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144701-48-4

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144701-48-4 Usage

Description

Telmisartan, a member of the benzimidazole class, is an angiotensin II receptor antagonist used widely in the treatment of hypertension. It is a white or off-white crystalline powder, odorless and tasteless, with specific chemical properties that allow it to be soluble in chloroform, slightly soluble in methanol, very slightly soluble in acetone, and practically insoluble in water. Telmisartan was launched in the US for the treatment of hypertension and is the sixth of its class to be marketed after the lead compound Losartan. It is known for its long-lasting effect (24-hour half-life) and does not require transformation into an active metabolite for its activity. Telmisartan is a potent competitive antagonist of AT1 receptors, which mediate most of the important effects of angiotensin II, while lacking affinity for the AT2 subtypes or other receptors involved in cardiovascular regulation.

Uses

1. Cardiotonic Applications:
Telmisartan is used as a cardiotonic agent for the treatment of congestive heart failure.
2. Antihypertensive Applications:
Telmisartan is used alone or in combination with other classes of antihypertensives for the treatment of hypertension.
3. Anti-cancer Applications:
Telmisartan is used as an anti-cancer agent, although its specific role and mechanism in cancer treatment are not detailed in the provided materials.
4. Diabetic Nephropathy Treatment:
Telmisartan is used in the treatment of diabetic nephropathy in hypertensive patients with type 2 diabetes mellitus.
5. Hypertension Treatment:
Telmisartan is used as an angiotensin II receptor antagonist for the treatment of hypertension, providing effective and sustained blood-pressure lowering effects with a low incidence of side effects.
Used in Pharmaceutical Industry:
Telmisartan is used as an active pharmaceutical ingredient for the development of drugs targeting hypertension, congestive heart failure, and diabetic nephropathy.
Used in Clinical Studies:
Telmisartan is used in clinical studies to evaluate its efficacy and safety in treating various cardiovascular conditions, including hypertension and heart failure.

Mechanisms of Action

80mg of telmisartan for the human body will practically completely counter the high blood pressure caused by angiotension II. Effects will last for 24 and can still be detected within 48 hours. Blood pressure-lowering effects should gradually become apparent within 3 hours after the initial dose. If treatment is suddenly interrupted, blood pressure will return to the same level as before treatment in a matter of days, and there will be no rebound high blood pressure. In a clinical trial that compared two kinds of antihypertensive drugs, patients in the treatment group experienced lower rates of coughing than those in the group treated by angiotensin converting enzyme inhibitors. Telmisartan has a half-life of 18~24 hours, and will take effect 1~4 hours after taken. Medicinal effects can last for as long as 35 hours, with a high (T/P) ratio and outstanding effects in controlling morning blood pressure. Thus, this medicine can effectively control blood pressure for 24 hours, and it meets the once-daily medicinal standard (40~80mg, qd). Clinical effects and characteristics: Pharmacokinetics show: Rapid effects (0.3h), long duration (35.4h), little effect on heart rate when lowering blood pressure. Compared to Enalapril: Stronger antihypertensive effects than Enalapril; when both are used in combination with diuretics, Telmisartan still appears to be superior and results in a lower coughing rate. Compared to Lisinopril: More apparent antihypertensive effects (for both systolic and diastolic blood pressure), coughing rate for Telmisartan (16%) is drastically lower than that of Lisinopril (60%). Compared to Atenolol: Similar antihypertensive effects, lower rate of side effects (impotence and fatigue). Compared to Amlodipine: The Telmisartan group experienced noticeably lower heart rates four hours after ingestion and from six a.m. to twelve p.m. Overall, Telmisartan has the following characteristics in comparison with other antihypertensive medicine: specific receptor effects, noticeable hypertensive effects, good diuretic effects, improvement of myocardial stenosis, safe usage, good tolerance, and convenient daily dosage.

Side Effects

In the placebo control experiment, the incidence rate of negative events for the Telmisartan group (41.4%) was similar to that of the placebo group (43.9%). Negative events were unrelated to dosage, sex, age, or race. The following lists negative reactions were accumulated via the 5788 hypertensive patients that were treated with Telmisartan in the clinical trial. Negative effects are categorized by incident rate as: Very common (>1/10); common (>1/100, <1/10=); uncommon (>1/1000, <1/100=); rare (>1/10000, <1/1000=); very rare (<1/100000=) Bodily reaction: Common: Back pain (e.g. sciatica), chest pain, flu-like symptoms, infection symptoms (e.g. urinary tract infection including cystitis). Uncommon: sight abnormality, sweating. Central and peripheral nervous system: Common: vertigo. Digestive system: Common: stomach pain, diarrhea, indigestion, gastrointestinal disorders. Rare: dry mouth, bloating. Muscle skeletal system: Common: joint pain, leg cramps or leg pain, muscle pain. Rare: Tenosensitis symptoms. Nervous system: Rare: anxiety. Respiratory system: Common: upper respiratory tract infection, including pharyngitis and rhinitis. Skin and accessory system: Common: Skin abnormalities such as eczema. Additionally, since Telmisartan entered the market, there have been individual cases of erythema, itching, syncope, insomnia, depression, stomach discomfort, vomiting, hypotension, bradycardia, tachycardia, dyspnea, eosinophilia, thrombocytopenia, weakness, and reduced work efficiency. Similar to other angiotensin II receptor blockers, very few cases have reported vascular edema, nettles, and other negative reactions. The laboratory found: compared to the placebo, the Telmisartan group occasionally exhibited lowered hemoglobin or raised uric acid. Any increase in serum creatinine or liver enzymes in the Telmisartan group was similar or lower than that of the placebo group.

Patent

Telmisartan was originally formulated by the German pharmaceutical company Boehringer Ingelheim; it earned the German patent EP502,314 in 1991, was first approved to enter the American market in November 1998, and then entered German, Philippines, Australian, Belgium, British, and other markets.

Originator

Boehringer Ingelheim (Germany)

Manufacturing Process

A solution of 23.9 g (100 mMol) of methyl 3,4-diaminobenzoate dihydrochloride and 11.7 g (110 mMol) of butyric acid chloride in 100 ml of phosphorus oxychloride is refluxed for 2 h. Then about 80 ml of phosphorus oxychloride are distilled off and the residue is mixed with about 150 ml of water. The oily crude product precipitated is extracted three times with 50 ml of ethyl acetate and after evaporation purified by column chromatography (600 g of silica gel; eluant:methylene chloride/methanol (30:1)). Yield of methyl-2-n-propyl-benzimidazole-5-carboxylate: 15.0 g of oil (69%).A solution of 15.0 g (73 mmol) of methyl 2-n-propyl-benzimidazole-5- carboxylate and 8 g (200 mMol) of sodium hydroxide in 200 ml of water and 400 ml of ethanol is refluxed for 2 h. Then the alcohol is distilled off, the aqueous solution is acidified with dilute sulphuric acid (pH 4-5) and evaporated using a rotary evaporator. The product crystallising out is suction filtered, washed with 50 ml of acetone and 50 ml of diethylether and dried. Yield of 2-n-propyl-benzimidazole-5-carboxylic acid-hemisulphate: 9.1 g (61%), melting point: >220°C.A solution of 6.7 g (25 mMol) of 2-n-propyl-benzimidazole-5-carboxylic acidhemisulphate and 4.9 g (25 mMol) of 2-methylaminoaniline dihydrochloride in 200 g of polyphosphoric acid is stirred for 5 h at 150°C, then poured onto 600 ml of water and made alkaline with concentrated ammonia whilst cooling with ice. The resulting solution is extracted three times with 200 ml of ethyl acetate, the crude product thus obtained is purified by column chromatography (300 g of silica gel; eluant:methylene chloride/methanol = 15:1). Yield of 2-n-propy1-5-(1-methylbenzimidazol-2-yl)-benzimidazole: 2.8 g of oil (39%).A solution of 2.0 g (6.9 mMol) of 2-n-propyl-5-(1-methylbenzimidazol-2-yl)- benzimidazole and 0.91 g (7.5 mmol) of potassium tert-butoxide in 50 ml of dimethylsulfoxide is stirred for 90 min at room temperature, then 2.6 g (7.5 mMol) of tert-butyl 4'-bromomethyl-biphenyl-2-carboxylate are added and the mixture is stirred for a further 15 h at room temperature. The mixture is then poured onto 300 ml of water and extracted three times with 50 ml of ethyl acetate. The crude product obtained after evaporation of the organic phase is purified by column chromatography (300 g silica gel; eluant:methylene chloride/methanol = 30:1). In this way, 2.7 g (70%) of an isomer mixture are obtained (by NMR spectroscopy), contains about 1.18 g of tert-butyl-4'-[(2-npropyl- 5-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl)-methyl]biphenyl-2- carboxylate and about 1.52 g of tert-butyl 4'-[(2-n-propyl-6-(1- methylbenzimidazol-2-yl)-benzimidazol-1-yl)-methyl]biphenyl-2-carboxylate).2.70 g of the isomer mixture obtained above are dissolved in 100 ml of methylene chloride, mixed with 40 ml of trifluoroacetic acid and stirred for 4 h at room temperature. The mixture is then evaporated to dryness in vacuo, the residue is dissolved in 100 ml of 2 N sodium hydroxide solution, the solution is washed with 50 ml of diethylether and the product mixture is precipitated by acidifying the aqueous phase with acetic acid. By column chromatography (400 g of silica gel, eluant:methylene chloride/methanol = 15:1) of the solid thus obtained 0.9 g (74%) of 4'-[[2-n-propyl-6-(1-methylbenzimidazol-2-yl)- benzimidazol-1-yl]methyl]biphenyl-2-carboxylate, melting point 217°-218°C.

Therapeutic Function

Antihypertensive

Biochem/physiol Actions

Telmisartan is a non-peptide AT1 angiotensin receptor antagonist.

Clinical Use

Angiotensin-II antagonist: Hypertension Prevention of cardiovascular events

Drug interactions

Potentially hazardous interactions with other drugs Anaesthetics: enhanced hypotensive effect. Analgesics: antagonism of hypotensive effect and increased risk of renal impairment with NSAIDs; hyperkalaemia with ketorolac and other NSAIDs. Antihypertensives: increased risk of hyperkalaemia, hypotension and renal impairment with ACE-Is and aliskiren. Cardiac glycosides: concentration of digoxin increased. Ciclosporin: increased risk of hyperkalaemia and nephrotoxicity. Diuretics: enhanced hypotensive effect; hyperkalaemia with potassium-sparing diuretics. ESAs: increased risk of hyperkalaemia; antagonism of hypotensive effect. Lithium: reduced excretion (possibility of enhanced lithium toxicity). Potassium salts: increased risk of hyperkalaemia. Tacrolimus: increased risk of hyperkalaemia and nephrotoxicity.

Metabolism

Telmisartan is metabolised by conjugation to the glucuronide of the parent compound. No pharmacological activity has been shown for the conjugate. Telmisartan is excreted almost entirely in the faeces via bile, mainly as unchanged drug.

Check Digit Verification of cas no

The CAS Registry Mumber 144701-48-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,7,0 and 1 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 144701-48:
(8*1)+(7*4)+(6*4)+(5*7)+(4*0)+(3*1)+(2*4)+(1*8)=114
114 % 10 = 4
So 144701-48-4 is a valid CAS Registry Number.
InChI:InChI=1/C33H30N4O2/c1-7-12-33-39-34-24(2)21-27(35-38-30-15-10-11-16-31(30)40(35)6)22-32(34)41(33)23-25-17-19-26(20-18-25)28-13-8-9-14-29(28)36(42)43-37(3,4)5/h8-11,13-22H,7,12,23H2,1-6H3

144701-48-4 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • TCI America

  • (T2861)  Telmisartan  >98.0%(HPLC)(T)

  • 144701-48-4

  • 1g

  • 690.00CNY

  • Detail
  • TCI America

  • (T2861)  Telmisartan  >98.0%(HPLC)(T)

  • 144701-48-4

  • 5g

  • 2,500.00CNY

  • Detail
  • Sigma-Aldrich

  • (Y0000648)  Telmisartan  European Pharmacopoeia (EP) Reference Standard

  • 144701-48-4

  • Y0000648

  • 1,880.19CNY

  • Detail
  • Sigma-Aldrich

  • (Y0000649)  Telmisartan for peak identification  European Pharmacopoeia (EP) Reference Standard

  • 144701-48-4

  • Y0000649

  • 1,880.19CNY

  • Detail
  • Sigma-Aldrich

  • (Y0001003)  Telmisartan for system suitability  European Pharmacopoeia (EP) Reference Standard

  • 144701-48-4

  • Y0001003

  • 1,880.19CNY

  • Detail
  • USP

  • (1643419)  Telmisartan  United States Pharmacopeia (USP) Reference Standard

  • 144701-48-4

  • 1643419-200MG

  • 4,662.45CNY

  • Detail
  • Sigma

  • (T8949)  Telmisartan  ≥98% (HPLC), solid

  • 144701-48-4

  • T8949-10MG

  • 1,835.73CNY

  • Detail
  • Sigma

  • (T8949)  Telmisartan  ≥98% (HPLC), solid

  • 144701-48-4

  • T8949-50MG

  • 7,072.65CNY

  • Detail

144701-48-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017

1.Identification

1.1 GHS Product identifier

Product name telmisartan

1.2 Other means of identification

Product number -
Other names Telmisartan

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:144701-48-4 SDS

144701-48-4Synthetic route

4'-[[2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-1H-benzimidazol-1-yl]-methyl]-2-cyano-biphenyl
144702-27-2

4'-[[2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-1H-benzimidazol-1-yl]-methyl]-2-cyano-biphenyl

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4'-[[2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-1H-benzimidazol-1-yl]-methyl]-2-cyano-biphenyl With sodium hydroxide; water In ethylene glycol for 8h; Heating / reflux;
Stage #2: With acetic acid In water; ethylene glycol at 20℃; pH=4; Product distribution / selectivity;
98%
Stage #1: 4'-[[2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-1H-benzimidazol-1-yl]-methyl]-2-cyano-biphenyl With potassium hydroxide; water In ethylene glycol at 140 - 150℃; for 21h;
Stage #2: With hydrogenchloride In water; ethylene glycol at 20℃; pH=7; Product distribution / selectivity;
98%
Stage #1: 4'-[[2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-1H-benzimidazol-1-yl]-methyl]-2-cyano-biphenyl With water; potassium hydroxide In ethylene glycol at 150 - 155℃;
Stage #2: With water; acetic acid for 2h; pH=4 - 4.5; Product distribution / selectivity;
98.7%
4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester
528560-93-2

4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester With methanol; sodium hydroxide; water for 2h; Heating / reflux;
Stage #2: With acetic acid In water
98.6%
Stage #1: 4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester With methanol; potassium hydroxide for 24h; Reflux;
Stage #2: With formic acid Product distribution / selectivity;
96%
Stage #1: 4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester With sodium hydroxide In methanol; water for 3h; Reflux;
Stage #2: With acetic acid In methanol; water pH=5;
95%
2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole
152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

4'-bromomethylbiphenyl-2-carboxylic acid
150766-86-2

4'-bromomethylbiphenyl-2-carboxylic acid

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole With sodium hydride In N,N-dimethyl-formamide at 0 - 5℃; for 1h;
Stage #2: 4'-bromomethylbiphenyl-2-carboxylic acid In N,N-dimethyl-formamide at 10℃; Solvent; Reagent/catalyst; Temperature;
95%
tert-butyl-4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylate hydrochloride
515815-48-2

tert-butyl-4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylate hydrochloride

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: tert-butyl-4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylate hydrochloride With acetic acid In water Heating / reflux;
Stage #2: With sodium hydroxide In water at 80 - 90℃;
93.3%
With sodium hydroxide; water In water; acetic acid at 80 - 90℃; Heating / reflux;93.3%
tert-butyl 4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylate
144702-26-1

tert-butyl 4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With sodium hydroxide In tetrahydrofuran at 100℃; Reagent/catalyst; Solvent;93%
With trifluoroacetic acid In N,N-dimethyl-formamide for 4h;70%
With trifluoroacetic acid In N-methyl-acetamide63.9%
With trifluoroacetic acid In dichloromethane for 24h; Ambient temperature; Yield given;
4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylic acid ammonium salt
960356-44-9

4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylic acid ammonium salt

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylic acid ammonium salt With pyrographite In methanol at 25℃; for 0.5h;
Stage #2: With acetic acid In methanol at 5℃; for 1h;
93%
at 60℃; for 12h; Temperature; Time;91%
4'-[(2-butyrylamino-3-methyl-5-(1N-methyl-1H-benzimidazol-2-yl)-phenylamino)-methyl]-biphenyl-2-carboxylic acid isopropyl ester

4'-[(2-butyrylamino-3-methyl-5-(1N-methyl-1H-benzimidazol-2-yl)-phenylamino)-methyl]-biphenyl-2-carboxylic acid isopropyl ester

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4'-[(2-butyrylamino-3-methyl-5-(1N-methyl-1H-benzimidazol-2-yl)-phenylamino)-methyl]-biphenyl-2-carboxylic acid isopropyl ester With acetic acid for 3h; Reflux;
Stage #2: With sodium hydroxide In ethanol for 12h; Reflux;
Stage #3: With hydrogenchloride In ethanol; water for 1h; pH=5 - 6; Cooling;
92%
4'-[(2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-benzimidazol-1-yl)methyl]-biphenyl-2-carboxaldehyde
172525-90-5

4'-[(2-n-propyl-4-methyl-6-(1-methyl-benzimidazol-2-yl)-benzimidazol-1-yl)methyl]-biphenyl-2-carboxaldehyde

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With hydrogenchloride; sodium chlorite; sodium dihydrogenphosphate; dihydrogen peroxide In water; acetonitrile at 10 - 20℃; for 1.5h;90.6%
With oxone In N,N-dimethyl acetamide at 20 - 120℃; for 27.5h;
With sodium perborate In acetic acid at 100℃;
C25H25BN2O4

C25H25BN2O4

2-bromo-1-methyl-1H-benzo[d]imidazole
49572-60-3

2-bromo-1-methyl-1H-benzo[d]imidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With palladium diacetate; sodium carbonate In 1,4-dioxane at 80℃; for 6h; Reagent/catalyst; Solvent; Suzuki Coupling; Inert atmosphere;90.05%
4’-((1,7′-dimethyl-2′-propyl-1H,3′H-[2,5′-bibenzo[d]imidazol]-3′-yl)methyl)-[1,1′-biphenyl]-2-carboxamide
915124-86-6

4’-((1,7′-dimethyl-2′-propyl-1H,3′H-[2,5′-bibenzo[d]imidazol]-3′-yl)methyl)-[1,1′-biphenyl]-2-carboxamide

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4’-((1,7′-dimethyl-2′-propyl-1H,3′H-[2,5′-bibenzo[d]imidazol]-3′-yl)methyl)-[1,1′-biphenyl]-2-carboxamide With sulfuric acid In water at 125℃; for 28h;
Stage #2: With sodium hydroxide In dichloromethane; water pH=5.4;
89%
Stage #1: 4’-((1,7′-dimethyl-2′-propyl-1H,3′H-[2,5′-bibenzo[d]imidazol]-3′-yl)methyl)-[1,1′-biphenyl]-2-carboxamide With potassium hydroxide In propylene glycol at 85 - 150℃;
Stage #2: With water; acetic acid at 25 - 85℃; for 1.25h;
84%
potassium (1-(2′-carboxy-[1,1′-biphenyl]-4-yl)-4-methyl-2-propylbenzimidazole-6-yl)trifluoroborate

potassium (1-(2′-carboxy-[1,1′-biphenyl]-4-yl)-4-methyl-2-propylbenzimidazole-6-yl)trifluoroborate

2-bromo-1-methyl-1H-benzo[d]imidazole
49572-60-3

2-bromo-1-methyl-1H-benzo[d]imidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium hydroxide In ethanol; water at 150℃; for 0.5h; Catalytic behavior; Reagent/catalyst; Temperature; Suzuki Coupling; Microwave irradiation; Sealed tube;89%
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium hydroxide In ethanol; water at 150℃; under 13680.9 Torr; for 0.5h; Reagent/catalyst; Temperature; Suzuki Coupling; Microwave irradiation; Sealed tube;89%
telmisartan tert-butyl ester oxalate

telmisartan tert-butyl ester oxalate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: telmisartan tert-butyl ester oxalate With water; sodium hydroxide In butan-1-ol at 115 - 120℃;
Stage #2: With hydrogenchloride In water; butan-1-ol at 10 - 30℃; for 5h; pH=4.5 - 5;
88.4%
Methyl 4'-(bromomethyl)biphenyl-2-carboxylate
114772-38-2

Methyl 4'-(bromomethyl)biphenyl-2-carboxylate

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole
152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: Methyl 4'-(bromomethyl)biphenyl-2-carboxylate; 2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole With potassium hydroxide In dimethyl sulfoxide at 25 - 50℃; for 4h;
Stage #2: With water; acetic acid In water; dimethyl sulfoxide at 20℃; pH=3.8 - 4; Product distribution / selectivity;
88%
Stage #1: Methyl 4'-(bromomethyl)biphenyl-2-carboxylate; 2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole With sodium hydroxide In dimethyl sulfoxide at 25 - 50℃; for 4h;
Stage #2: With water; acetic acid In water; dimethyl sulfoxide pH=4.2; Product distribution / selectivity;
80%
4-{[2-n-propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazol-1-yl]methyl}chlorobenzene

4-{[2-n-propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazol-1-yl]methyl}chlorobenzene

sodium 2-carboxylic acid phenylborate

sodium 2-carboxylic acid phenylborate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With palladium diacetate; potassium carbonate; triphenylphosphine In 2-methyltetrahydrofuran; water at 65℃; for 20h; Inert atmosphere;88%
3'-([2'-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)biphenyl-4-yl]methyl)-1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzimidazole
1191259-51-4

3'-([2'-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)biphenyl-4-yl]methyl)-1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzimidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With hydrogenchloride; water at 100 - 105℃; for 30h;85%
With hydrogenchloride; water at 100 - 105℃; for 30h; Inert atmosphere;85%
Stage #1: 3'-([2'-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)biphenyl-4-yl]methyl)-1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzimidazole With hydrogenchloride; water for 30h; Reflux;
Stage #2: With sodium hydroxide In water at 0 - 20℃; pH=9 - 10;
Stage #3: With acetic acid In water; acetonitrile for 2h; pH=5 - 5.5;
85%
4-(chloromethyl)biphenyl-2'-carboxylic acid
667457-41-2

4-(chloromethyl)biphenyl-2'-carboxylic acid

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole
152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole With sodium hydride In N,N-dimethyl-formamide at 20℃; for 0.5h; Cooling with ice;
Stage #2: 4-(chloromethyl)biphenyl-2'-carboxylic acid In N,N-dimethyl-formamide at 20 - 50℃; for 5h; Reagent/catalyst; Temperature;
84%
4'-[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-ylmethyl]biphenyl-2-carboxylic acid dihydrochloride

4'-[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-ylmethyl]biphenyl-2-carboxylic acid dihydrochloride

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With ammonia In methanol; water at 0 - 55℃; for 7.75h; pH=6.5;82.2%
3'-{[2'-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)biphenyl-4-yl]methyl}-1,7'-dimethyl-2'-propyl-1H.3'H-2,5'-bibenzimidazole

3'-{[2'-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)biphenyl-4-yl]methyl}-1,7'-dimethyl-2'-propyl-1H.3'H-2,5'-bibenzimidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With hydrogenchloride In water at 100 - 110℃; for 30h;80%
4'-(1,4'-dimethyl-2'-propyl-1H-[2,5']dibenzimidazolyl-3'-ylmethyl)biphenyl-2-carboxylic acid methyl ester hydrochloride
884330-05-6

4'-(1,4'-dimethyl-2'-propyl-1H-[2,5']dibenzimidazolyl-3'-ylmethyl)biphenyl-2-carboxylic acid methyl ester hydrochloride

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 4'-(1,4'-dimethyl-2'-propyl-1H-[2,5']dibenzimidazolyl-3'-ylmethyl)biphenyl-2-carboxylic acid methyl ester hydrochloride With potassium hydroxide In acetonitrile at 80 - 85℃; for 2h;
Stage #2: With acetic acid In water; acetonitrile at 60 - 65℃; for 2h; pH=5 - 5.5;
77%
4'-chloromethylbiphenyl-2-carboxylic acid methyl ester

4'-chloromethylbiphenyl-2-carboxylic acid methyl ester

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole
152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Stage #1: 2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole With potassium hydroxide In acetonitrile for 0.166667h;
Stage #2: 4'-chloromethylbiphenyl-2-carboxylic acid methyl ester In acetonitrile
Stage #3: With hydrogenchloride In water
75.1%
3-(4-((1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]imidazol-3'-yl)methyl)phenyl)propiolic acid
1197049-22-1

3-(4-((1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]imidazol-3'-yl)methyl)phenyl)propiolic acid

acetylene
74-86-2

acetylene

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
bis(1,5-cyclooctadiene)diiridium(I) dichloride; 1,2-bis-(diphenylphosphino)ethane In tetrahydrofuran at 30℃; for 8h; Inert atmosphere;68%
carbon monoxide
201230-82-2

carbon monoxide

3'-((2'-bromobiphenyl-4-yl)methyl)-1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]imidazole
1206701-77-0

3'-((2'-bromobiphenyl-4-yl)methyl)-1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]imidazole

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
With tributyl-amine; cesium acetate; palladium diacetate; triphenylphosphine In water; N,N-dimethyl-formamide at 120℃; for 24h;60%
methyl 4-amino-3-methylbenzoate
18595-14-7

methyl 4-amino-3-methylbenzoate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1: chlorobenzene / 100 °C
2: fuming HNO3, 60percent H2SO4 / 0 °C
3: H2 / 10percent Pd/C / methanol / 50 °C / 3750.3 Torr
4: glacial CH3COOH / 1.5 h / Heating
5: 5.46 g / aq. NaOH / methanol / 2 h / Heating
6: 5.86 g / polyphosphoric acid / 20 h / 150 °C
7: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
8: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
N-methylbenzene-1,2-diamine dihydrochloride
25148-68-9

N-methylbenzene-1,2-diamine dihydrochloride

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 5.86 g / polyphosphoric acid / 20 h / 150 °C
2: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
3: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid
152628-03-0

4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 5.86 g / polyphosphoric acid / 20 h / 150 °C
2: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
3: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
methyl 4-(n-butyrylamino)-3-methylbenzoate
301533-59-5

methyl 4-(n-butyrylamino)-3-methylbenzoate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: fuming HNO3, 60percent H2SO4 / 0 °C
2: H2 / 10percent Pd/C / methanol / 50 °C / 3750.3 Torr
3: glacial CH3COOH / 1.5 h / Heating
4: 5.46 g / aq. NaOH / methanol / 2 h / Heating
5: 5.86 g / polyphosphoric acid / 20 h / 150 °C
6: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
7: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
4-methyl-2-propyl-1H-benzimidazole-6-carboxylic acid methyl ester
152628-00-7

4-methyl-2-propyl-1H-benzimidazole-6-carboxylic acid methyl ester

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 5.46 g / aq. NaOH / methanol / 2 h / Heating
2: 5.86 g / polyphosphoric acid / 20 h / 150 °C
3: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
4: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
Multi-step reaction with 3 steps
1.1: sodium hydroxide; water / methanol / 80 °C
2.1: sodium hydroxide / N,N-dimethyl-formamide; water / 0.5 h / 0 - 5 °C
2.2: 0.5 h
3.1: sodium hydroxide / methanol / 80 °C
3.2: 5 - 10 °C / pH 6 - 6.5
View Scheme
Multi-step reaction with 5 steps
1.1: potassium hydroxide / N,N-dimethyl-formamide / 20 - 32 °C
2.1: water; sodium hydroxide / methanol / 70 °C
2.2: 2 h / pH 3 - 4
3.1: thionyl chloride / 4 h / 78 - 80 °C / Inert atmosphere
4.1: triethylamine / dichloromethane / 0.5 h / 5 - 10 °C / Inert atmosphere
4.2: 85 °C
4.3: pH 9 - 10
5.1: water; potassium hydroxide / ethylene glycol / 150 - 155 °C
5.2: 2 h / pH 4 - 4.5
View Scheme
methyl 4-(n-butyrylamino)-3-methyl-5-aminobenzoate
675882-71-0

methyl 4-(n-butyrylamino)-3-methyl-5-aminobenzoate

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: glacial CH3COOH / 1.5 h / Heating
2: 5.46 g / aq. NaOH / methanol / 2 h / Heating
3: 5.86 g / polyphosphoric acid / 20 h / 150 °C
4: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
5: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
Multi-step reaction with 6 steps
1.1: toluene-4-sulfonic acid / toluene / Reflux
2.1: potassium hydroxide / N,N-dimethyl-formamide / 20 - 32 °C
3.1: water; sodium hydroxide / methanol / 70 °C
3.2: 2 h / pH 3 - 4
4.1: thionyl chloride / 4 h / 78 - 80 °C / Inert atmosphere
5.1: triethylamine / dichloromethane / 0.5 h / 5 - 10 °C / Inert atmosphere
5.2: 85 °C
5.3: pH 9 - 10
6.1: water; potassium hydroxide / ethylene glycol / 150 - 155 °C
6.2: 2 h / pH 4 - 4.5
View Scheme
4-butyrylamino-3-methyl-5-nitro-benzoic acid methyl ester
152628-01-8

4-butyrylamino-3-methyl-5-nitro-benzoic acid methyl ester

telmisatran
144701-48-4

telmisatran

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: H2 / 10percent Pd/C / methanol / 50 °C / 3750.3 Torr
2: glacial CH3COOH / 1.5 h / Heating
3: 5.46 g / aq. NaOH / methanol / 2 h / Heating
4: 5.86 g / polyphosphoric acid / 20 h / 150 °C
5: 1.) t-BuOK / 1.) DMSO, RT, 30 min, 2.) DMSO, 14 h
6: CF3COOH / CH2Cl2 / 24 h / Ambient temperature
View Scheme
Multi-step reaction with 3 steps
1.1: water; sodium dithionite / 70 - 100 °C
2.1: sodium hydroxide / N,N-dimethyl-formamide; water / 0.5 h / 0 - 5 °C
2.2: 0.5 h
3.1: sodium hydroxide / methanol / 80 °C
3.2: 5 - 10 °C / pH 6 - 6.5
View Scheme
Multi-step reaction with 4 steps
1.1: sodium dithionite / water / 70 - 100 °C
2.1: sodium hydroxide; water / methanol / 80 °C
3.1: sodium hydroxide / N,N-dimethyl-formamide; water / 0.5 h / 0 - 5 °C
3.2: 0.5 h
4.1: sodium hydroxide / methanol / 80 °C
4.2: 5 - 10 °C / pH 6 - 6.5
View Scheme
Multi-step reaction with 7 steps
1.1: hydrogen / nickel / methanol / 30 - 36 °C / 2574.5 - 3310.08 Torr / Autoclave
2.1: toluene-4-sulfonic acid / toluene / Reflux
3.1: potassium hydroxide / N,N-dimethyl-formamide / 20 - 32 °C
4.1: water; sodium hydroxide / methanol / 70 °C
4.2: 2 h / pH 3 - 4
5.1: thionyl chloride / 4 h / 78 - 80 °C / Inert atmosphere
6.1: triethylamine / dichloromethane / 0.5 h / 5 - 10 °C / Inert atmosphere
6.2: 85 °C
6.3: pH 9 - 10
7.1: water; potassium hydroxide / ethylene glycol / 150 - 155 °C
7.2: 2 h / pH 4 - 4.5
View Scheme
methanesulfonic acid
75-75-2

methanesulfonic acid

telmisatran
144701-48-4

telmisatran

telmisartan methanesulfonate

telmisartan methanesulfonate

Conditions
ConditionsYield
In tetrahydrofuran for 2h; Solvent; Reflux;98.6%
N-tert-butoxycarbonyl-O-diethylcarbamoyl-N-bromopropylhydroxylamine

N-tert-butoxycarbonyl-O-diethylcarbamoyl-N-bromopropylhydroxylamine

telmisatran
144701-48-4

telmisatran

3-((tert-butoxycarbonyl)((diethylcarbamoyl)oxy)amino)propyl 4'-((1,7'-dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)-[1,1'-biphenyl]-2-carboxylate

3-((tert-butoxycarbonyl)((diethylcarbamoyl)oxy)amino)propyl 4'-((1,7'-dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)-[1,1'-biphenyl]-2-carboxylate

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 60℃;98%
telmisatran
144701-48-4

telmisatran

4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylic acid ammonium salt
960356-44-9

4'-[[2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)-benzimidazol-1-yl]-methyl]-biphenyl-2-carboxylic acid ammonium salt

Conditions
ConditionsYield
With ammonia In ethanol at 10 - 15℃; Solvent; Temperature; Large scale;96.3%
With ammonium hydroxide In ethanol; water at 25℃; for 0.166667h; Time;
With ammonia In methanol
telmisatran
144701-48-4

telmisatran

telmisartan sodium
515815-47-1

telmisartan sodium

Conditions
ConditionsYield
With sodium hydroxide In ethanol; water; toluene at 78℃; for 0.5h;96%
Stage #1: telmisatran With sodium hydroxide In methanol; water at 20℃; for 2h;
Stage #2: In ethanol; tert-butyl methyl ether at 20℃; for 4.5h; Product distribution / selectivity; Heating / reflux;
95%
With sodium hydroxide In ethanol at 20℃; for 1h;81%
temozolomide
85622-93-1

temozolomide

telmisatran
144701-48-4

telmisatran

4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester
528560-93-2

4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid methyl ester

Conditions
ConditionsYield
With sodium carbonate In 1,4-dioxane; water at 60℃; for 6h; Sealed tube;95%
telmisatran
144701-48-4

telmisatran

2-[4-[[4-methyl-6-(1-methylbenzoimidazol-2-yl)-2-propylbenzoimidazol-1-yl]methyl]phenyl]benzoic acid zinc salt

2-[4-[[4-methyl-6-(1-methylbenzoimidazol-2-yl)-2-propylbenzoimidazol-1-yl]methyl]phenyl]benzoic acid zinc salt

Conditions
ConditionsYield
With zinc(II) chloride In acetone at 53℃; for 2h; Product distribution / selectivity;93%
C15H22N4O5

C15H22N4O5

telmisatran
144701-48-4

telmisatran

C48H50N8O6

C48H50N8O6

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃; Inert atmosphere;93%
diiodomethane
75-11-6

diiodomethane

telmisatran
144701-48-4

telmisatran

C67H60N8O4

C67H60N8O4

Conditions
ConditionsYield
With potassium carbonate In dimethyl sulfoxide at 50℃; for 12h; Solvent; Temperature;93%
dichloromethane
75-09-2

dichloromethane

telmisatran
144701-48-4

telmisatran

C67H60N8O4

C67H60N8O4

Conditions
ConditionsYield
With potassium carbonate In dimethyl sulfoxide at 65℃; for 18h; Reagent/catalyst; Temperature; Solvent;92%
telmisatran
144701-48-4

telmisatran

1,2-dibromomethane
74-95-3

1,2-dibromomethane

C67H60N8O4

C67H60N8O4

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 70℃; for 8h; Solvent; Temperature; Reagent/catalyst;92%
iodobromomethane
557-68-6

iodobromomethane

telmisatran
144701-48-4

telmisatran

C67H60N8O4

C67H60N8O4

Conditions
ConditionsYield
With sodium carbonate In dimethyl sulfoxide at 65℃; for 9h;91%
diphenyltin(IV) dichloride
1135-99-5

diphenyltin(IV) dichloride

telmisatran
144701-48-4

telmisatran

C78H68N8O4Sn

C78H68N8O4Sn

Conditions
ConditionsYield
for 8h; Reflux;90%
Chloroiodomethane
593-71-5

Chloroiodomethane

telmisatran
144701-48-4

telmisatran

C67H60N8O4

C67H60N8O4

Conditions
ConditionsYield
With sodium carbonate In dimethyl sulfoxide at 65℃; for 8h;90%
dibutyltin chloride
683-18-1

dibutyltin chloride

telmisatran
144701-48-4

telmisatran

C74H76N8O4Sn

C74H76N8O4Sn

Conditions
ConditionsYield
for 8h; Reflux;89%
telmisatran
144701-48-4

telmisatran

4'-((1,7'-dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)[1,1'-biphenyl]-2-carbonyl fluoride

4'-((1,7'-dimethyl-2'-propyl-1H,3'H-[2,5'-bibenzo[d]imidazol]-3'-yl)methyl)[1,1'-biphenyl]-2-carbonyl fluoride

Conditions
ConditionsYield
With dmap; trifluoromethyl trifluoromethanesulfonate In dichloromethane at 20℃; for 1h; Inert atmosphere; Schlenk technique;89%
With N,N,N',N'-tetramethyl-1,8-diaminonaphthalene; fluoro-N,N,N',N'-tetramethylformamidinium hexafluorophosphate In tetrahydrofuran at 20℃;
With (bis-(2-methoxyethyl)amino)sulfur trufluoride In dichloromethane at 0℃; for 1h;
telmisatran
144701-48-4

telmisatran

2-[4-[[4-methyl-6-(1-methylbenzoimidazol-2-yl)-2-propylbenzoimidazol-1-yl]methyl]phenyl]benzoic acid calcium salt

2-[4-[[4-methyl-6-(1-methylbenzoimidazol-2-yl)-2-propylbenzoimidazol-1-yl]methyl]phenyl]benzoic acid calcium salt

Conditions
ConditionsYield
With calcium hydroxide In methanol at 60 - 65℃; for 12h;87%
With calcium hydroxide In methanol Heating / reflux;

144701-48-4Relevant articles and documents

Improved one-pot synthesis of telmisartan

Rao, Challa Nageswar,Naresh, Tondepu,Satyanarayana, Komati,Reddy, Bojja Ramachandra,Reddy, Ghanta Mahesh

, p. 530 - 534 (2010)

Cost-effective and improved one-pot synthesis for telmisartan (1) is described that minimizes the reaction time and gives high-purity material. Copyright Taylor & Francis Group, LLC.

A convergent approach to the total synthesis of telmisartan via a Suzuki cross-coupling reaction between two functionalized benzimidazoles

Martin, Alex D.,Siamaki, Ali R.,Belecki, Katherine,Gupton, B. Frank

, p. 1915 - 1919 (2015)

A direct and efficient total synthesis has been developed for telmisartan, a widely prescribed treatment for hypertension. This approach brings together two functionalized benzimidazoles using a high-yielding Suzuki reaction that can be catalyzed by either a homogeneous palladium source or graphene-supported palladium nanoparticles. The ability to perform the cross-coupling reaction was facilitated by the regio-controlled preparation of the 2-bromo-1-methylbenzimidazole precursor. This convergent approach provides telmisartan in an overall yield of 72% while circumventing many issues associated with previously reported processes.

MANUFACTURING METHOD OF BIPHENYL-2-CARBOXYLIC ACID METHYL ESTER

-

Paragraph 0071-0076, (2019/12/25)

PROBLEM TO BE SOLVED: To provide a manufacturing method of 4'-{[4-methyl-6-(1-methyl-1H-benzimidazole-2-yl)-2-propyl-1H-benzimidazole-1-yl]methyl}biphenyl-2-carboxylic acid methyl ester, capable of improving yield and quality, and enhancing efficiency of workability in an industrial scale. SOLUTION: There is provided a manufacturing method of 4'-{[4-methyl-6-(1-methyl-1H-benzimidazole-2-yl)-2-propyl-1H-benzimidazole-1-yl]methyl}biphenyl-2-carboxylic acid methyl ester by adding water to a reaction mixture containing an organic polar solvent and 4'-{[4-methyl-6-(1-methyl-1H-benzimidazole-2-yl)-2-propyl-1H-benzimidazole-1-yl]methyl}biphenyl-2-carboxylic acid methyl ester generated by mixing a mixture obtained by adding 2-n-propyl-4-methyl-6-(1'-methylbenzimidazole-2-yl)benzimidazole and a base to an organic polar solvent, and 4'-bromomethyl biphenyl-2-carboxylic acid methyl ester, to crystallize the methyl ester. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT

Solid dispersions comprising Telmisartan and the preparation method thereof

-

Paragraph 0111; 0114; 0118, (2018/05/15)

The solid dispersions comprising telmisartan and a manufacturing method thereof, according to the present invention, unlike conventional methods requiring a low yield, can manufacture telmisartan of a high yield through simple and short steps by using a relatively inexpensive raw material, can secure excellent quality through reduction of generation of decomposition products, and can manufacture the solid dispersions on a mass production basis to be commercially available. Therefore, the solid dispersions of novel crystalline polymorph of the telmisartan of the present invention has improved storage stability and solubility, and can be synthesized at a high yield, thereby being expected to be very useful in the manufacture of pharmaceuticals.COPYRIGHT KIPO 2018

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