- A new and improved process for celiprolol hydrochloride
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Celiprolol hydrochloride, a β-blocker drug, has been synthesized by a new approach. How this new process offers distinctive advantages over the existing one will be described.
- Joshi, Ramesh A.,Gurjar, Mukund K.,Tripathy, Narendra K.,Chorghade, Mukund S.
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- Design, synthesis and biological evaluation of novel benzopyran sulfonamide derivatives as 5-HT6 receptor ligands
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On the basis of a known pharmacophore model for 5-HT6 receptor antagonists (5-HT6R), we have designed and synthesized a novel series of benzopyran sulfonamide derivatives 9(a-d), 20(a-d) and 21(a-d) and their structures were confirmed by 1H NMR and mass spectral data. All the synthesized compounds were tested for their antagonistic activity towards 5-HT6R in a cell based reporter gene in vitro functional assay. Most of the tested compounds showed moderate to potent binding affinities towards 5-HT6R.
- Nirogi, Ramakrishna V. S.,Badange, Rajeshkumar,Reballi, Veena,Khagga, Mukkanti
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- Sigma Complexes in the Pyrimidine Series. 6. Reaction of 5-Nitro-2-methoxy- and 5-Nitro-4,6-dimethoxypyrimidines with the Acetylacetone Carbanion
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Depending on the reaction conditions, the reaction of 5-nitro-2-methoxy- and 5-nitro-4,6-dimethoxypyrimidines with acetylacetone carbanion gives potassium salts of 5-nitrodiacetylmethylenepyrimidines or, as a result of recyclization of the pyrimidine ring, 5-nitro-2-hydroxyacetophenone.
- Remennikov, G. Ya.,Kisilenko, A. A.,Cherkasov, V. M.
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Read Online
- Raf kinase inhibitor based on chromone structure, and preparation method and uses thereof
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The invention relates to the technical field of pharmaceutical chemistry, and more concretely relates to a group of chromone compounds (A), wherein R1-R10, X1 and X2 are defined in the description. The invention also discloses a preparation method of the
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Paragraph 0160; 0161; 0162
(2016/10/07)
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- A kind of two-thiazoline ketone compounds and pharmaceutical compositions thereof and use thereof (by machine translation)
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The invention provides general formula (I) indicated by the thiazoline ketone compounds and pharmaceutical compositions thereof and use thereof. The compounds can be combined with the bromodomain domain of the protein, thereby adjusting the downstream signal path, to play a particular function, can be used for treating the relevant domain protein in the bromodomain of various diseases. Such compounds can be interference has Brd4 bromodomain domain with the acetylated histone binding, and then lower the oncogene c - the ventilating cabins and its related target gene transcription, so that it may be effective for treating the tumor. (by machine translation)
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Paragraph 0091; 0092
(2017/01/17)
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- 8-nitro-2-four azolyl-4- carbonyl benzene benzopyran synthetic method
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The invention relates to a synthesis method of 8-nitro-2-tetrazol-5-yl-4-oxo-4H-1-benzopyran. The method comprises the following steps: firstly nitrifying hydroxyacetophenone taken as a starting material with a nitric acid so as to generate a mixture of 2
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Paragraph 0033; 0034; 0035
(2017/02/24)
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- Design, synthesis and docking studies of novel thienopyrimidine derivatives bearing chromone moiety as mTOR/PI3Kα inhibitors
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Two series of thienopyrimidine derivatives (10a-k, 16a-j) bearing chromone moiety were designed and synthesized. All the compounds were evaluated for inhibitory activity against mTOR kinase at a concentration of 10uM. Four selected compounds were further evaluated for the IC50 values against mTOR kinase, PI3Kα kinase and two cancer cell lines. Some of the target compounds exhibited moderate to excellent mTOR/PI3Kα kinase inhibitory activity and cytotoxicity. The most promising compound 16i showed good inhibitory activity against mTOR/PI3Kα kinase and good antitumor potency for H460 and PC-3 cell lines with IC50 values of 0.16 ± 0.03 μM, 2.35 ± 0.19 μM, 1.20 ± 0.23 μM and 0.85 ± 0.04 μM, which were 8.6, >5, 7.9 and 19.1 times more active than compound I (1.37 ± 0.07 μM, >10 μM, 9.52 ± 0.29 μM, 16.27 ± 0.54 μM), respectively. Structure-activity relationships (SARs) and docking studies indicated that the chromone moiety is necessary for the potent antitumor activity and cytotoxicity of these compounds. Substitution of the chromone moiety at the 6-position has a significant impact to the inhibitory activity, in particular a carboxylic acid group, produced the best potency.
- Zhu, Wufu,Chen, Chen,Sun, Chengyu,Xu, Shan,Wu, Chunjiang,Lei, Fei,Xia, Hui,Tu, Qidong,Zheng, Pengwu
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- Identification of 3-hydroxy-4[3,4-dihydro-3-oxo-2H-1,4-benzoxazin-4-yl]-2,2-dimethyldihydro-2H-benzopyran derivatives as potassium channel activators and anti-inflammatory agents
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The present study described the design, synthesis and identification of 3-hydroxy-4[3,4-dihydro-3-oxo-2H-1,4-benzoxazin-4-yl]-2,2-dimethyldihydro-2H-benzopyran derivatives. Their biological activity was tested for KATP channel opener as antihypertensives, COX-1 and COX-2 activity. The results were compared with the activity of cromakalim, ibuprofen and celecoxib. The study aimed at exploring the influence of introduction of a benzoxazine substituent at position 6 of various derivatives of benzopyrans in order to improve biological activity. Several compounds were found to be equipotent or even more potent than cromakalim. Out of these nitro-substituted benzopyrans, nitro substitution at benzoxazino group possessed potent antihypertensive activity in the R/S isomers. With amino derivatives, activity remains constant when compared with standard cromakalim. Similarly, compounds 17b, 17c, 17e and 17h have exhibited around 40 % inhibition of COX-1 as compared to the inhibition of COX-2. Only two compounds 17g and 17i exhibited effective inhibition more than 50 % of COX-2 compared with the inhibition of COX-1 at a concentration of 0.3 mg/ml.
- Bano, Mohsina,Barot, Kuldipsinh P.,Jain, Shailesh V.,Ghate, Manjunath D.
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p. 3008 - 3020
(2015/03/18)
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- Synthesis, structure-activity relationship of novel substituted 4H-chromen-1,2,3,4-tetrahydropyrimidine-5-carboxylates as potential anti-mycobacterial and anticancer agents
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Series of 4H-chromen-1,2,3,4-tetrahydropyrimidine-5-carboxylate derivatives 7a-7zb, 8a-8d and 9a-9d were synthesized and screened for their in vitro anti-mycobacterial activity against Mycobacterium tuberculosis H37Rv (MTB) and cytotoxicity against three human cancer cell lines including A549, SK-N-SH and HeLa. The results indicate that six compounds are more potent and 7za is most effective anti-mycobacterial derivative compared to the standard drugs Ethambutol and Ciprofloxacin. However, 12 compounds exhibited cytotoxicity against human neuroblastoma cell line; amongst them the compound 7v is most effective compared to the standard drug Doxorubicin. This is the first report assigning in vitro anti-mycobacterial, anticancer and structure-activity relationship for this new class of 4H-chromen-1,2,3,4-tetrahydropyrimidine-5- carboxylates.
- China Raju,Nageswara Rao,Suman,Yogeeswari,Sriram,Shaik, Thokhir Basha,Kalivendi, Shasi Vardhan
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p. 2855 - 2859
(2011/06/24)
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- A facile demethylation of ortho substituted aryl methyl ethers promoted by AlCl3
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An efficient and practical demethylation of ortho substituted aryl methyl ethers using AlCl3 has been developed. This method gives a high conversion, is simple to operate and is cost-effective. A mechanism involving the complexation of AlCl3 with the OMe and the adjacent electron withdrawing group is proposed. Many functional groups can be tolerated in the demethylation process, and 29 examples gave a demethylated product in a yield of 90-98%.
- Du, Zhen-Ting,Lu, Jing,Yu, Hong-Rui,Xu, Yan,Li, An-Pai
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experimental part
p. 222 - 227
(2010/08/04)
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- ANTI-HIV COMPOUNDS
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Thiazole derivatives represented by Formula (I) are disclosed, where R1, R2, R3, A, X, Y, Z, R6 and R7 are disclosed herein. These thiazole derivatives and pharmaceutical compositions comprising these derivatives are useful in the treatment of HIV mediated diseases and conditions.
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Page/Page column 55
(2009/08/14)
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- Antifungal Triazole Derivatives
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Disclosed herein are antifungal triazole derivatives or pharmaceutically acceptable salts thereof, a preparation method thereof, and a pharmaceutical composition comprising the same.
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Page/Page column 20
(2008/12/07)
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- ANTIFUNGAL TRIAZOLE DERIVATIVES
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Disclosed herein are antifungal triazole derivatives or pharmaceutically acceptable salts thereof, a preparation method thereof, and a pharmaceutical composition comprising the same.
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Page/Page column 48
(2010/11/24)
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- Microwave assisted direct ortho-acylation of phenol and naphthol derivatives by BF3·(C2H5)2O
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The solventless acylation of phenol and naphthol derivatives with various organic acids and BF3·(C2H5) 2O, under microwave conditions, was studied. High yields of the o-acylated products were achieved in a very short time.
- Naeimi, Hossein,Moradi, Leila
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p. 284 - 287
(2008/02/04)
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- QSAR studies of paeonol analogues for inhibition of platelet aggregation
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Various paeonol analogues were synthesized and tested in vitro as inhibitors of platelet aggregation. Structural properties (or descriptors) of paeonol analogues were calculated and the structure-activity relationships were determined. Several multiple linear and nonlinear regression models and back-propagation neural network model were tested and the latter using relative positive charge, hydration energy, and hydrophilic factor as inputs gave the best data fitting with R2 = 0.89 and qpre2=0.66. The correlation coefficient between antiplatelet inhibition activity with an interaction energy between the paeonol compounds with COX-1 enzyme is only 0.39.
- Doble, Mukesh,Karthikeyan,Padmaswar,Akamanchi
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p. 5996 - 6001
(2007/10/03)
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- One-step reaction of friedel-crafts acylation and demethylation of aryl-methyl ethers catalyzed by ytterbium(III) triflate
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Catalytic amount of ytterbium(III) inflate [Yb(OTf)3] has been used to catalyze Friedel-Crafts acylation and demethylation of aryl-methyl ethers in one-step reaction to produce hydroxyacylphenones with moderate yields under mild conditions.
- Su, Weike,Jin, Can
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p. 4199 - 4205
(2007/10/03)
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- Demonstrating the Synergy of Synthetic, Mechanistic, and Computational Studies in A Regioselective Aniline Synthesis
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Tri- and tetrasubstituted anilines are formed in good to excellent yields by the addition of ketones to vinamidinium salts (up to 98%). The reaction proceeds via the formation of dienone intermediates, which react to form an enamine with the liberated amine. In the case of a nitro, or dimethylaminomethylene substituent, the enamines undergo a facile electrocyclic ring closure to form a cyclohexadiene, which goes on to form anilines with a high degree of selectivity (up to 50:1) with a minor competing pathway proceeding via the enol providing phenols. Competition experiments using isotopic substitution reveal that the rate determining step en route to dienone is enol/enolate addition to the vinamidinium salt, which is characterized by an inverse secondary isotope effect (kH/D 0.7-0.9). Computational studies have been used to provide a framework for understanding the reaction pathway. The original proposal for a [1,5]-H shift was ruled out on the basis of the calculations, which did not locate a thermally accessible transition state. The minimum energy conformation of the enamine is such that a facile electrocyclic ring closure is ensured, which is corroborated by the experimental studies. A framework for understanding the reaction pathway is presented.
- Davies, Ian W.,Marcoux, Jean-Francois,Kuethe, Jeffery T.,Lankshear, Michael D.,Taylor, Jeremy D. O.,Tsou, Nancy,Dormer, Peter G.,Hughes, David L.,Houk,Guner, Vildan
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p. 1298 - 1308
(2007/10/03)
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- Bismuth(III) triflate: Novel and efficient catalyst for Claisen and Fries rearrangements of allyl ethers and phenyl esters
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Bismuth(III) triflate catalyzed Claisen and Fries rearrangements of allyl phenyl ethers and phenyl acetates have been presented. The reaction proceeds smoothly and yields corresponding rearranged products in good yields. The bismuth triflate displays higher activity over the corresponding La, Yb, and Sc triflates.
- Sreedhar,Swapna,Sridhar
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p. 1433 - 1440
(2007/10/03)
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- Regio-selective mono nitration of phenols with ferric nitrate in room temperature ionic liquid
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The mono nitration of phenols with ferric nitrate has been achieved in high regio-selectivities in 1-3 h at 30-60°C using the ionic liquid 1,3-di-n-butylimidazolium tetraflouroborate [bbim]BF4 as the solvent. In particular, excellent para selectives of the order of 76-86% for unsubstituted, ortho and meta-substituted phenols were observed.
- Rajagopal,Srinivasan
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p. 961 - 966
(2007/10/03)
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- An unexpected [1,5]-H shift in the synthesis of nitroanilines
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Equation Presented Addition of methyl acetoacetate to 2-nitrovinamidinium hexafluorophosphate salts leads to the formation of anilines or phenols in good to excellent yields depending on the alkylamine substituents. Small substituents, e.g., pyrrolidine,
- Davies, Ian W.,Marcoux, Jean-Francois,Taylor, Jeremy D. O.,Dormer, Peter G.,Deeth, Robert J.,Marcotte, Felix-Antoine,Hughes, David L.,Reider, Paul J.
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p. 439 - 441
(2007/10/03)
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- Development of serine protease inhibitors displaying a multicentered short (<2.3 ?) hydrogen bond binding mode: Inhibitors of urokinase-type plasminogen activator and factor Xa
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Novel scaffolds that bind to serine proteases through a unique network of short hydrogen bonds to the catalytic Ser195 have been developed. The resulting potent serine protease inhibitors were designed from lead molecule 2-(2-hydroxyphenyl)1H-benzoimidazo
- Verner,Katz,Spencer,Allen,Hataye,Hruzewicz,Hui,Kolesnikov,Li,Luong,Martelli,Radika,Rai,She,Shrader,Sprengeler,Trapp,Wang,Young,Mackman
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p. 2753 - 2771
(2007/10/03)
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- Benzenesulphonamide derivatives, preparation thereof and therapeutical uses thereof
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Benzenesulphonamide compounds of general formula (I), wherein R1is a hydrogen or halogen atom such as chlorine or fluorine, or a straight or branched C1-4alkyl or C1-4alkoxy group, each of R2, R3and R4, which are the same or different, is a hydrogen atom or a straight, branched or cyclic C1-4alkyl group, and R1is a hydrogen atom or a C1-2alkyl, C1-2fluoroalkyl or C1-2perfluoroalkyl group, in the form of enantiomers, diastereoisomers or mixtures thereof, including racemic mixtures, as well as pharmaceutically acceptable acid addition salts thereof, are provided for therapeutical use.
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- Tricyclic compounds and drug compositions containing the same
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Compounds having a β-3 adrenaline receptor agonist and are useful as drugs for the treatment and prevention of diabetes, obesity, hyperlipemia, etc., represented by a general formula (I) and salts thereof, and a process for producing these, and their intermediates, wherein R represents hydrogen or methyl; R1 represents hydrogen, halogen, hydroxy, benzyloxy, amino, or hydroxymethyl; R2 represents hydrogen, hydroxymethyl, NHR3, SO2 NR4 R4', or nitro; R6 represents hydrogen or lower alkyl; and X represents nitrogen, R9 represents hydrogen, one of R7 and R8 represent hydrogen, and the other thereof represents hydrogen, amino, acetylamino, or hydroxy.
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- Synthesis and in-vitro evaluation of platelet aggregation inhibitory activity of paeonol and its analogues
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Paeonol (1-(2-hydroxy-4-methoxyphenyl)ethanone) and a series of substituted 1-(2-hydroxyphenyl)ethanone derivatives were synthesized and screened as inhibitors of platelet aggregation. The compounds with the greatest anti-platelet potential among the series tested were 1-(2,5-dihydroxyphenyl)ethanone (65.36% inhibition at 300 μM against 5 μM ADP), paeonol(36.31%), 1-(2-hydroxy-5-methoxyphenyl)ethanone (24.47%), 1-(2-hydroxy-5-nitrophenyl) ethanone (30.40%) and 1-(5-chloro-2-hydroxy-4-methylphenyl)ethanone (24.43%).
- Akamanchi,Padmawar,Thatte,Rege,Dahanukar
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p. 323 - 329
(2007/10/03)
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- Microwave assisted Fries rearrangement on K 10 montmorillonite
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An expeditious solvent free Fries rearrangement is described which occurs under mild conditions on K 10 montmorillonite using microwave radiations.
- Kad,Trehan,Kaur,Nayyar,Arora,Brar
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p. 734 - 736
(2007/10/03)
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- Synthesis and Biochemical Evaluation of a Series of Aminoflavones as Potential Inhibitors of Protein-Tyrosine Kinases p56lek, EGFr, and p60v-src
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A series of nitroflavones, 8a-p, and their corresponding aminoflavone hydrochloride salts, 10a-p, was synthesized.The preparation of nitroflavones 8b-i,o,p began with commercially available o-hydroxyacetophenones 2b-f which were converted to o-hydroxynitroacetophenones 3a-h via a variety of nitration methods, followed by condensation with nitrobenzyl chlorides and cyclization under acidic condition.The nitroflavones 8a,j-n were prepared by nitration of the corresponding flavones 7a-e.These new compounds were evaluated for their abilities to inhibit the in vitro protein-tyrosine kinase activities of p56lek, EGFr, and p60v-src, and all of the active compounds were amino-substituted flavones.None of the nitroflavones inhibited the enzymes.The most active substance in this series against p56lek was compound 10j, which had an IC50 of 18 μM.When tested versus EGFr, compounds 10a,m displayed IC50's of 8.7 and 7.8 μM, respectively.Against p60v-src, 10a,m showed IC50 values of 28.8 and 38.4 μM, respectively.
- Cushman, Mark,Zhu, Helen,Geahlen, Robert L.,Kraker, Alan J.
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p. 3353 - 3362
(2007/10/02)
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- PYRIMIDINE SIGMA-COMPLEXES. 7. THE RECYCLIZATION OF 5-NITROPYRIMIDINE AND ITS METHOXY DERIVATIVES UPON REACTION WITH THE ACETYLACETONE CARBANION
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A study was carried out on the reaction of 5-nitro and 5-nitromethoxypyrimidines with the acetylacetone carbanion.Benzene and pyridine derivatives are formed as a result of recyclization.The direction of the reaction depends on the position of the substituents in the pyrimidine ring and the nature of the bases.
- Remennikov, G. Ya.,Kurilenko, L. K.,Boldyrev, I. V.,Cherkasov, V. M.
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p. 422 - 425
(2007/10/02)
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- Two New Thia Chalcones
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4-Hydroxy-3-nitro- and 2-hydroxy-5-nitroacetophenone (1 and 3), both obtained by nitrating the parent hydroxy ketone, were condensed with thiophene-α-carboxaldehyde in the presence of dilute NaOH to give the appropriate yellow thia chalcones 2, mp 147 deg C, and 4, mp 190 -191 deg C, with yields of 72.5 percent and 71 percent, respectively.The chalcones (C13H9NSO4) were characterized by elemental analysis as well as by their IR and (1)H NMR spectra.
- Szell, Thomas,Brand, Andrea,Ratanathanawongs, Siriwan
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