- Iron-catalyzed cross-coupling of N?methoxy amides and arylboronic acids for the synthesis of N-aryl amides
-
An efficient iron-catalyzed synthesis of N-aryl amides from N?methoxy amides and arylboronic acids is developed. FeCl3 is used as the sole catalyst for the cross-coupling reaction between N?methoxy amides and arylboronic acids without any other
- Li, Jinhui,Liu, Jin-Biao,Luo, Nianhua,Qiu, Guanyinsheng,Ren, Shangfeng,Wang, Ying,Xie, Huilin
-
-
- CuO-decorated magnetite-reduced graphene oxide: a robust and promising heterogeneous catalyst for the oxidative amidation of methylarenes in waterviabenzylic sp3C-H activation
-
A magnetite-reduced graphene oxide-supported CuO nanocomposite (rGO/Fe3O4-CuO) was preparedviaa facile chemical method and characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV-vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) analysis, vibrating-sample magnetometry (VSM), and thermogravimetric (TG) analysis. The catalytic activity of the rGO/Fe3O4-CuO nanocomposite was probed in the direct oxidative amidation reaction of methylarenes with free amines. Various aromatic and aliphatic amides were prepared efficiently at room temperature from cheap raw chemicals usingtert-butyl hydroperoxide (TBHP) as a “green” oxidant and low-toxicity TBAI in water. This method combines the oxidation of methylarenes and amide bond formation into a single operation. Moreover, the synthesized nanocomposites can be separated from the reaction mixtures using an external magnet and reused in six consecutive runs without a noticeable decrease in the catalytic activity.
- Ebrahimi, Edris,Khalafi-Nezhad, Ali,Khalili, Dariush,Rousta, Marzieh
-
p. 20007 - 20020
(2021/11/12)
-
- Nitromethane as a nitrogen donor in Schmidt-type formation of amides and nitriles
-
The Schmidt reaction has been an efficient and widely used synthetic approach to amides and nitriles since its discovery in 1923. However, its application often entails the use of volatile, potentially explosive, and highly toxic azide reagents. Here, we report a sequence whereby triflic anhydride and formic and acetic acids activate the bulk chemical nitromethane to serve as a nitrogen donor in place of azides in Schmidt-like reactions. This protocol further expands the substrate scope to alkynes and simple alkyl benzenes for the preparation of amides and nitriles.
- Jiao, Ning,Liu, Jianzhong,Qiu, Xu,Song, Song,Wei, Jialiang,Wen, Xiaojin,Zhang, Cheng,Zhang, Ziyao
-
supporting information
p. 281 - 285
(2020/01/28)
-
- Green synthetic method of N-arylamides using recyclable cheap metal catalyst
-
Magnetically separable and reusable Fe/Cu oxide (Fe3O4-Cu2O) nanoparticles were employed as an efficient catalyst for the arylation of benzamide, which was carried out with a range of both arylboronic acid and benzamide to afford N-arylamide in good to excellent yield.
- Wang, Xingyang,Liu, Jianhui,An, Guanghui
-
supporting information
(2020/10/05)
-
- 2-phenylpyrimidine compounds, preparation method and medical application
-
The invention belongs to the field of medicines and particularly relates to 2-phenylpyrimidine compounds and pharmacologically-acceptable salts thereof and an isotope marker. The invention also discloses a pharmaceutical composition containing the substances and application of the pharmaceutical composition for treating diseases related with protein kinase activity, such as cancer and inflammation. (The formula is shown in the description).
- -
-
Paragraph 0062; 0063; 0082; 0083; 0084
(2018/06/15)
-
- Base-promoted synthesis of N-arylbenzamides by N-benzoylation of dimethylphenylthioureas
-
An efficient synthesis of 10 N-arylbenzamides was achieved by N-benzoylation of N,N-dimethyl-(N'-phenyl)thioureas with 4-substituted benzoyl chlorides in dimethylacetamide in the presence of K2CO3. The features of this method include
- Liu, Xing,Xu, Wan,Zeng, Meng-Tian,Liu, Min,Chang, Cai-Zhu,Zhu, Hui,Dong, Zhi-Bing
-
p. 484 - 486
(2017/08/18)
-
- Nickel-Catalyzed Reductive Addition of Aryl/Benzyl Halides and Pseudohalides to Carbodiimides for the Synthesis of Amides
-
A Nickel-catalyzed reductive process is described for the direct amidation of benzyl and aryl halides using carbodiimides as the amidating agent. Moreover, aryl and benzyl C–O electrophiles such as triflate, acetate, tosylate, trityl ether, and pivalate were converted into amides using this method. The in-situ-generated Ni0acts as a catalyst for the reaction at room temperature for benzylic substrates, and 70 °C for aryl electrophiles. This new nickel-catalyzed reductive coupling protocol provides a general and operationally simple method for the synthesis of diverse amides using carbodiimides. Amides bearing bulky substituents can be synthesized by this strategy in high yield, which demonstrates its effectiveness in amide synthesis.
- Panahi, Farhad,Jamedi, Fereshteh,Iranpoor, Nasser
-
p. 780 - 788
(2017/01/18)
-
- Imidazolium salt-supported Mukaiyama reagent: An efficient condensation reagent for amide bond formation
-
A novel imidazolium salt-supported Mukaiyama reagent (2-chloropyridinium salt) has been developed and explored as an efficient coupling agent for amide bond formation. The use of an ionic liquid-supported reagent enabled isolation of the amide products by simple extraction with organic solvents in high purity and avoiding column chromatography purification. This journal is
- Pandey, Khima,Muthyala, Manoj Kumar,Choudhary, Sunita,Kumar, Anil
-
p. 13797 - 13804
(2015/02/19)
-
- Synthesis of 2-(4-aminophenyl) benzothiazole derivatives and use thereof
-
The present invention provides a method of preparing a compound of formula 6 comprising: (a) reacting a compound of formula 1 with a compound of formula 2 to form a compound of formula 3 wherein X of formula 2 is Cl or OH; (b) treating the compound formula 3 with Lawesson's reagent to form a compound of formula 4 (c) reacting a compound of formula 4 with potassium ferricyanide to produce a compound of formula 5 and (d) performing catalytic reduction of nitro group of the compound of formula 5 with palladium on charcoal to generate the compound of formula 6, wherein R1 of formulae 1-6 is H, C1-10 alkyl, C1-10 alkoxy or C1-10 haloalkyl, and R2 of formulae 1-6 is H or C1-10 alkyl. The present invention also provides a photodynamic therapy to a patient having at least one tumor comprising the steps of: administering a compound of formula 6 (wherein R1 and R2 are defined as the above) in a pharmaceutically acceptable carrier to the patient; waiting for a sufficient time to allow the administered compound to be taken up by a target tissue having the at least one tumor; and irradiating a region of the patient containing the target tissue; wherein growth of the tumor is inhibited.
- -
-
Page/Page column 7
(2013/12/03)
-
- Preparation of esters and amides from carboxylic acids and N-formylation of amines promoted by 1,3,5-triazo-2,4,6-triphosphorine-2,2,4,4,6,6-hexachloride (TAPC)
-
A new method is described for the preparation of esters and amides promoted by TAPC from carboxylic acids using a solvent-free grinding technique. The solvent-free N-formylation of amines is also reported.
- Bahrami, Kiumars,Khodaei, Mohammad M.,Targhan, Homa,Sheikh Arabi, Mehdi
-
supporting information
p. 5064 - 5068
(2013/09/02)
-
- TiCl4 hiocarbonyls and oxidation of sulfides in the presence of H2O2
-
H2O2 in combination with TiCl4 proved to be a highly reactive reagent system for the desulfurization of thioamide and thioketone derivatives in excellent yields and short reaction times with high purity. Sulfides were also found to undergo oxidation to sulfones under similar reaction conditions. In most cases, these reactions are highly selective, simple, and clean, affording products in high yields and purity.
- Bahrami, Kiumars,Khodaei, Mohammad M.,Shakibaian, Vida,Khaledian, Donya,Yousefi, Behrooz H.
-
experimental part
p. 155 - 163
(2012/06/01)
-
- Yttrium (amidate) complexes for catalytic C-N bond formation. Rapid, room temperature amidation of aldehydes
-
Yttrium (amidate) precatalysts are highly active for the mild amidation of aldehydes with amines. Reactions occur at room temperature within 5 min in up to 98% isolated yield. These rare-earth systems are effective for this transformation in the absence of supplementary heat, light, base, or oxidants. The reaction proceeds with functionalized amines and/or aldehydes. A comparison of various amidate precatalysts in combination with reaction monitoring suggests that the targeted amide products formed during the reaction promote the formation of alternative catalytically active amidate species in situ.
- Thomson, Jaclyn A.,Schafer, Laurel L.
-
experimental part
p. 7897 - 7904
(2012/08/07)
-
- SYNTHESIS OF 2-(4-AMINOPHENYL) BENZOTHIAZOLE DERIVATIVES AND USE THEREOF
-
The present invention provides a method of preparing a compound of formula 6 comprising: (a) reacting a compound of formula 1 with a compound of formula 2 to form a compound of formula 3 wherein X of formula 2 is Cl or OH; (b) treating the compound formula 3 with Lawesson's reagent to form a compound of formula 4 (c) reacting a compound of formula 4 with potassium ferricyanide to produce a compound of formula 5 and (d) performing catalytic reduction of nitro group of the compound of formula 5 with palladium on charcoal to generate the compound of formula 6, wherein R1 of formulae 1-6 is H, C1-10 alkyl, C1-10 alkoxy or C1-10 haloalkyl, and R2 of formulae 1-6 is H or C1-10 alkyl. The present invention also provides a photodynamic therapy to a patient having at least one tumor comprising the steps of: administering a compound of formula 6 (wherein R1 and R2 are defined as the above) in a pharmaceutically acceptable carrier to the patient; waiting for a sufficient time to allow the administered compound to be taken up by a target tissue having the at least one tumor; and irradiating a region of the patient containing the target tissue; wherein growth of the tumor is inhibited.
- -
-
-
- Synthesis, and biological evaluation of 2-(4-aminophenyl)benzothiazole derivatives as photosensitizing agents
-
Photodynamic therapy (PDT) employing exogenous photosensitizers is currently being approved for treatment of basal cell carcinoma (BCC). 2-(4-Aminophenyl)benzothiazoles (6) consist of chromophoric structure and absorb light in the UVA (315-400 nm). These results encouraged us to design and synthesize a diversity of 2-phenylbenzothiazoles (6). Studies on the apoptotic mechanism involved in photosensitive effects induced by UVA-activated 6 in BCC cells are carried out in the present article. 6-UVA-treated cells displayed several features of apoptosis, including an increase in the sub-G1 population, a significantly increased annexin V binding, and activation of caspase-3. 6-UVA induced a decrease in mitochondrial membrane potential (Δψ mt) and ATP via enhanced ROS generation and promoted phosphorylation of extracellular signal-regulated kinase (ERK) and p38 MAPK expression. These results suggest that 6-UVA elicits photosensitive effects in mitochondria processes which involve ERK and p38 activation, and ultimately lead to BCC cell apoptosis.
- Hu, Wan-Ping,Chen, Yin-Kai,Liao, Chao-Cheng,Yu, Hsin-Su,Tsai, Yi-Min,Huang, Shu-Mei,Tsai, Feng-Yuan,Shen, Ho-Chuan,Chang, Long-Sen,Wang, Jeh-Jeng
-
experimental part
p. 6197 - 6207
(2010/10/02)
-
- H2O2/SOCl2: a useful reagent system for the conversion of thiocarbonyls to carbonyl compounds
-
The H2O2/SOCl2 reagent system has been used as a new and efficient reagent for deprotection of thiocarbonyls to carbonyl compounds. The salient features of this protocol are short reaction times, good chemoselectivity, clean reaction profiles, and simple work-up that preclude the use of toxic solvents.
- Bahrami, Kiumars,Khodaei, Mohammad M.,Farrokhi, Azita
-
supporting information; experimental part
p. 7658 - 7661
(2009/12/04)
-
- Desulfurization of Thioamides into Amides with H2O 2/ZrCl4 Reagent System
-
The hydrogen peroxide/zirconium(IV) chloride reagent system has been used as a new and efficient reagent for the deprotection/desulfurization of thioamides to amides. This system is reasonably general and can be applied to the conversion of several thioamides to the corresponding amides. The salient features of this protocol are short reaction times, good chemoselectivity, cleaner reaction profiles, and simple workup that precludes the use of toxic solvents. Georg Thieme Verlag Stuttgart.
- Bahrami, Kiumars,Khodaei, Mohammad Mehdi,Tirandaz, Yeganeh
-
experimental part
p. 369 - 371
(2009/07/04)
-
- Synthesis and evaluation of18F-labeled 2-phenylbenzothiazoles as positron emission tomography imaging agents for amyloid plaques in alzheimer's disease
-
Imaging agents targeting amyloid β(Aβ) may be useful for early diagnosis and follow-up of treatment of patients with Alzheimer's disease (AD). Three of five tested 2-(4′-fluorophenyl)-1,3-benzothiazoles displayed high binding affinities for Aβ plaques in
- Serdons, Kim,Terwinghe, Christelle,Vermaelen, Peter,Van Laere, Koen,Kung, Hank,Mortelmans, Luc,Bormans, Guy,Verbruggen, Alfons
-
supporting information; experimental part
p. 1428 - 1437
(2009/12/26)
-
- N-amidation by copper-mediated cross-coupling of organostannanes or boronic acids with O-acetyl hydroxamic acids
-
(Chemical Equation Presented) A general nonoxidative N-amidation of organostannanes and boronic acids has been developed. Under nonbasic conditions a wide variety of aryl, alkenyl, and heteroaryl organostannanes and boronic acids couple efficiently with O-acetyl hydroxamic acids in the presence of Cu(I) sources.
- Zhang, Zhihui,Yu, Ying,Liebeskind, Lanny S.
-
supporting information; experimental part
p. 3005 - 3008
(2009/04/18)
-
- Direct oxidative amidation of aldehydes with anilines under mechanical milling conditions
-
(Chemical Equation Presented) Oxone is found to be an effective oxidant for the oxidative amidation of aldehydes with anilines to furnish amides in a one-pot process under mechanical milling conditions.
- Gao, Jie,Wang, Guan-Wu
-
p. 2955 - 2958
(2008/09/19)
-
- Cyclooxygenase-1-selective inhibitors are attractive candidates for analgesics that do not cause gastric damage. Design and in vitro/in vivo evaluation of a benzamide-type cyclooxygenase-1 selective inhibitor
-
Although cyclooxygenase-1 (COX-1) inhibition is thought to be a major mechanism of gastric damage by nonsteroidal anti-inflammatory drugs (NSAIDs), some COX-1-selective inhibitors exhibit strong analgesic effects without causing gastric damage. However, it is not clear whether their analgesic effects are attributable to COX-1-inhibitory activity or other bioactivities. Here, we report that N-(5-amino-2-pyridinyl)-4-(trifluoromethyl)benzamide (18f, TFAP), which has a structure clearly different from those of currently available COX-1-selective inhibitors, is a potent COX-1-selective inhibitor (COX-1 IC 50 = 0.80 ± 0.05 μM, COX-2 IC50 = 210 ± 10 μM). This compound causes little gastric damage in rats even at an oral dose of 300 mg/kg, though it has an analgesic effect at as low a dose as 10 mg/kg. Our results show that COX-1-selective inhibitors can be analgesic agents without causing gastric damage.
- Kakuta, Hiroki,Zheng, Xiaoxia,Oda, Hiroyuki,Harada, Shun,Sugimoto, Yukio,Sasaki, Kenji,Tai, Akihiro
-
p. 2400 - 2411
(2008/12/22)
-
- Intramolecular charge transfer with N-benzoylaminonaphthalenes. 1-Aminonaphthalene versus 2-aminonaphthalene as electron donors
-
N-(substituted-benzoyl)-1-aminonaphthalenes and N-(substituted-benzoyl)-2-aminonaphthalenes (1-NBAs and 2-NBAs) with varied substituents at the para- or meta-position of benzoylphenyl ring were prepared to probe the difference between 1-aminonaphthalene (1-AN) and 2-aminonaphthalene (2-AN) as electron donors, using benzanilide-like charge transfer as a probe reaction. An abnormal long-wavelength emission was found for all of the prepared aminonaphthalene derivatives in cyclohexane and was assigned to the CT state by the observation of a substantial red shift with increasing solvent polarity or with increasing electron-withdrawing ability of the substituent. The CT emission energies were found to follow a linear relationship with the Hammett constant of the substituent and the value of the linear slope for 1-NBAs (-0.45 eV) was higher than that of 2-NBAs(-0.35 eV), the latter being close to that of the aniline derivatives (BAs, -0.345 eV). This pointed to a higher extent of charge separation in the CT state of 1-NBAs in which a full charge separation was established by the reduction potential dependence of the CT emission energy with a linear slope of -1.00. The possible contribution of the difference in the steric effect and the electron donating ability of the donors in 1-NBAs and 2-NBAs was ruled out by the observation that the corresponding linear slopes of benzoyl-substituted BAs remained unchanged when para-, meta-, ortho-, or ortho, ortho-methyls were introduced into the aniline moiety. It was therefore concluded that 1-AN enhanced the charge transfer in 1-NBAs and the proximity of its 1La and 1Lb states was suggested to be responsible. Results showed that the charge transfers in 1-NBAs and 2-NBAs were not the same and 1-AN and 2-AN as electron donors were different not only in electron donating ability but in shaping the charge transfer pathways as well.
- Zhang, Xuan,Liu, Chun-Hua,Liu, Li-Hong,Wu, Fang-Ying,Guo, Lin,Sun, Xiang-Ying,Wang, Chao-Jie,Jiang, Yun-Bao
-
p. 728 - 732
(2007/10/03)
-
- Substituted cyclic amine compound, production process thereof and pharmaceutical composition for circulatory organ use containing the same
-
A substituted cyclic amine compound represented by the following general formula (1) STR1 wherein each of R1 to R5 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or the like, A represents a carbonyl group or a sulfonyl group, B represents a methine moiety or a nitrogen atom, D represents a methine moiety, a nitrogen atom or =N(→O)-- and n is an integer of 2 to 3; and synthetic methods thereof. The inventive compound is useful in preventing and treating circulatory organ-related diseases such as hypertension, ischemic heart disease, cerebrovascular disease, peripheral circulatory disease and the like.
- -
-
-
- Kinetics and Mechanism of the Aminolysis of S-Phenyl Thiobenzoates
-
Kinetic studies on the nucleophilic substitution reaction of S-phenyl thiobenzoates with anilines have been carried out at 55.0 deg C.Effects of substituents in the nucleophile(X), substrate(Y) and leaving groups(Z) are analyzed in terms of Hammett's and Broensted's coefficients, ρi and βi and cross-interaction constants ρij and βij where i and j denote X, Y or Z.The sign of ρXZ (or βXZ) is positive, and accordingly, the transition state(TS) variations with the substituents are consistent with those predicted by the potential energy surface diagram; the magnitude of ρx(βx) and ρxy decreases with a better leaving group, and that of ρz and βz decreases with a stronger nucleophile leading to an earlier TS, in agreement with a normal Hammond effect.The larger magnitudes of ρXY, ρYZ and βXZ suggest that the reaction proceeds by an associative SN2 mechanism.A greater kH/kD value (1.0) is observed with deuterated aniline nucleophiles for a stronger nucleophile and a better leaving group, supporting the earlier TS proposed on the basis of the cross-interaction constants.The inverse secondary kinetic isotope effects obtained preclude involvement of any four-center TS or base catalysis by aniline.
- Lee, Ikchoon,Shim, Chang Sub,Lee, Hai Whang
-
p. 769 - 793
(2007/10/02)
-
- The heterolytic and the homolytic cleavage of the oxygen-nitrogen bond in O,N-diacylarylhydroxylamines
-
Two O,N-diacylarylhydroxylamines were thermolysed in different solvents and first order rate constants and activation parameters were calculated.A six-membered transition state is suggested in acetonitrile, radical pairs or ion pairs are suggested in the other solvents.Photolysis of five of these compounds gave a homolytic reaction pattern.
- Bassoli, Angela,Gregorio, Giuseppina Di,Galliani, Guido,Riboldi, Massimo,Rindone, Bruno,et al.
-
p. 293 - 297
(2007/10/02)
-
- Synthesis and Antiviral Activity of Sulfonamidobenzophenone Oximes and Sulfonamidobenzamides
-
To find antiviral agents, various sulfonamidobenzophenone oximes (II) were synthesized from the appropriate m-sulfonamidobenzophenones by hydroxylamine reaction.The reaction products were generally obtained as syn/anti mixtures which were separable by fractional crystallization.The anti isomer had more potent antipoliovirus activity than the syn isomer.Various sulfonamidobenzamides (III) which were structurally related to II were synthesized by the reaction of amino-substituted benzamides with sulfuryl chloride or amines with (aminosulfonyl)benzoyl chloride.Antiviral activity was examined by the plaque-inhibition test.Compounds 5, 36, and 69 exhibited strong antipicornavirus activity.The structure-activity relationships are discussed.
- Ogata, Masaru,Matsumoto, Hiroshi,Shimizu, Sumio,Kida, Shiro,Wada, Toru,et al.
-
p. 417 - 423
(2007/10/02)
-
- REGENTS AND SYNTHETIC METHODS. 16. AMINOLYSIS OF N-ACYL-2-PHENYLIMINOOXAZOLIDINE. A NEW SYNTHESIS OF AMIDES
-
N-Acyl-2-phenyliminooxazolidines 7 were easily prepared and treated with several amines at room temperature, yielding amides 9 in very high yields.Possible mechanisms for this transformation are briefly discussed.
- Ganboa, Inaki,Palomo, Claudio
-
p. 167 - 170
(2007/10/02)
-
- Mechanisms for the Reactions of Nitrones with Aroyl Chlorides
-
Reaction of nitrones with equivalent quatities of aroyl chlorides in anhydrous dioxane containing triethylamine aields N,N-diacylamines.Treatment of nitrons with 18O-labeled benzoyl chloride under these conditions forms N,N-diacylamines with the 18O label distributed equally between the two acyl groups.Reaction of nitrones with equivalent or excess amounts of aroyl chlorides in anhydrous dioxane in the absence of triethylamine brings about isomerization of the nitrones to amides. α-Phenyl-N-(p-tolyl)nitrone treated with benzoyl chloride leads to an amide containing 50percent of the 18O label.Both reactions can be rationalized on the basis of the formation of aroyloxy(benzylidene)ammonium chlorides which undergo elimination of acid anions or acid to yield nitrillium ions.Addition of the acid anions or acids to the nitrillium ions affords the precursors to the N,N-diacylamines or isomerized amides, respectively.
- Heine, Harold W.,Zibuck, Regina,VandenHeuvel, William J. A.
-
p. 3691 - 3694
(2007/10/02)
-