- Non-metal Lewis acid-catalyzed cross-Claisen condensation for β-keto esters
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In this work, we disclose a new catalytic and highly chemoselective cross-Claisen condensation of esters. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles to achieve cross-Claisen condensation, requires mild conditions and has good tolerance of functional groups. This journal is
- Han, Zhengyu,Huang, Hai,Meng, Fuliang,Yang, Zhenkun,Zhang, Tianyu,Zhou, Dapeng
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supporting information
p. 9163 - 9166
(2021/11/16)
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- Discovery of pyrrolo[2,3-d]pyrimidine derivatives as potent Axl inhibitors: Design, synthesis and biological evaluation
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Axl has emerged as an attractive target for cancer therapy due to its strong correlation with tumor growth, metastasis, poor survival, and drug resistance. Herein, we report the design, synthesis and structure-activity relationship (SAR) investigation of a series of pyrrolo[2,3-d]pyrimidine derivatives as new Axl inhibitors. Among them, the most promising compound 13b showed high enzymatic and cellular Axl potencies. Furthermore, 13b possessed preferable pharmacokinetic properties and displayed promising therapeutic effect in BaF3/TEL-Axl xenograft tumor model. Compound 13b may serve as a lead compound for new antitumor drug discovery.
- Xu, Dandan,Sun, Deqiao,Wang, Wei,Peng, Xia,Zhan, Zhengsheng,Ji, Yinchun,Shen, Yanyan,Geng, Meiyu,Ai, Jing,Duan, Wenhu
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- MACROCYCLIC FUSED PYRRAZOLES AS MCL-1 INHIBITORS
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Provided are compounds represented by Formula IA: (IA), and the pharmaceutically acceptable salts and solvates thereof, wherein R, R 1a, R 1b, L 1, L 2, L 3, X, A, B and C are as defined as set forth
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Paragraph 0865
(2020/08/13)
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- Amidine compound containing substituent pyrimidine aryl groups and preparation method and application of amidine compound
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The invention discloses an amidine compound containing substituent pyrimidine aryl groups. The general formula of the amidine compound is as shown in formula F-1, and the definition of the various substituent groups of the amidine compound is as shown in
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Paragraph 0122; 0127; 0128
(2017/10/07)
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- Heterocyclic derivative and pharmaceutical composition comprising the same
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The present invention provides novel compounds having a P2X3 and/or P2X2/3 receptor antagonistic effect. A pharmaceutical composition having a P2X3 and/or P2X2/3 receptor antagonistic effect comprising a compoun
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Page/Page column 197
(2016/01/10)
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- Synthesis of aryl β-ketoesters by opening of aryl epoxides with ethyl diazoacetate catalyzed by BF3OEt2
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A facile synthesis of 4-aryl substituted β-ketoesters from the reaction aryl epoxides with ethyl diazoacetate, in presence of BF 3OEt2 has been described with excellent yields.
- Rao, D. Chandra,Reddy, D. Kumar,Shekhar,Chinababu,Rao, Ch. Bhujanga,Venkateswarlu
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p. 356 - 358
(2014/05/06)
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- Bioisosteric replacement of an acylureido moiety attached to an indolin-2-one scaffold with a malonamido or a 2/4-pyridinoylamido moiety produces a selectively potent Aurora-B inhibitor
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Bioisosteric replacement of acylureido moiety in 6-acylureido-3- pyrrolylmethylidene-2-oxoindoline derivatives resulted in a series of malonamido derivatives with indolin-2-one scaffold (11-14). Further conformational restrictions of the malonamido moiety led to 2-oxo-1,2-dihydropyridine (21-25) or a 4-oxo-1,4-dihydropyridine derivatives (31-36). 4-Oxo-1,4-dihydropyridine derivatives were more potent Aurora B inhibitors than their 2-oxo-1,2- dihydropyridine counterparts and demonstrated cytotoxicities against A549 and HepG2 cells in the submicromolar range. In A549 cells, 31h decreased phosphorylation of histone H3, triggered polyploidy, induced expression of pro-apoptotic Fas and FasL with subsequent activation of caspase 8, resulting into apoptosis. In a Huh7-xenograft mouse model, 31h demonstrated potent in vivo efficacy with a daily dose of 5 mg/kg.
- Wang, Hsiao-Chun,Jagtap, Ajit Dhananjay,Chang, Pei-Teh,Liu, Jia-Rong,Liu, Chih-Peng,Tseng, Hsiang-Wen,Chen, Grace Shiahuy,Chern, Ji-Wang
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p. 312 - 334
(2014/08/05)
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- Structure-based design of potent and selective leishmania N -myristoyltransferase inhibitors
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Inhibitors of Leishmania N-myristoyltransferase (NMT), a potential target for the treatment of leishmaniasis, obtained from a high-throughput screen, were resynthesized to validate activity. Crystal structures bound to Leishmania major NMT were obtained,
- Hutton, Jennie A.,Goncalves, Victor,Brannigan, James A.,Paape, Daniel,Wright, Megan H.,Waugh, Thomas M.,Roberts, Shirley M.,Bell, Andrew S.,Wilkinson, Anthony J.,Smith, Deborah F.,Leatherbarrow, Robin J.,Tate, Edward W.
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supporting information
p. 8664 - 8670
(2015/01/09)
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- Novel pyridinone derivatives as non-nucleoside reverse transcriptase inhibitors (NNRTIs) with high potency against NNRTI-resistant HIV-1 strains
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Novel 6-substituted-4-cycloalkyloxy-pyridin-2(1H)-ones were synthesized as non-nucleoside reverse transcriptase inhibitors (NNRTIs), and their biological activity was evaluated. Most of the compounds, especially 26 and 22, bearing a 3-isopropyl and 3-iodine group, respectively, exhibited highly potent activity against wild-type HIV-1 strains and those resistant to reverse transcriptase inhibitors (RTIs). The diastereoisomers of 26-trans and 26-cis were synthesized separately and confirmed with HPLC and NOESY spectra. The 26-trans isomers had an activity about 400-fold more potent than that of 26-cis. The pair of 26-trans enantiomers, one of the most potent inhibitors with EC50 of 4 nM and selectivity index (SI) of 75000, was highly effective against a panel of RTIs-resistant strains with single (Y181C and K103N) or double (A17) mutations in reverse transcriptase. The results suggest that these novel pyridinone derivatives have the potential to be further developed as new antiretroviral drugs with improved antiviral efficacy and drug resistance profile.
- Li, Amin,Ouyang, Yabo,Wang, Ziyun,Cao, Yuanyuan,Liu, Xiangyi,Ran, Li,Li, Chao,Li, Li,Zhang, Liang,Qiao, Kang,Xu, Weisi,Huang, Yang,Zhang, Zhili,Tian, Chao,Liu, Zhenming,Jiang, Shibo,Shao, Yiming,Du, Yansheng,Ma, Liying,Wang, Xiaowei,Liu, Junyi
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p. 3593 - 3608
(2013/06/27)
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- NOVEL HETEROCYCLIC DERIVATIVES AND PHARMACEUTICAL COMPOSITION CONTAINING SAME
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The present invention provides novel compounds having a P2X3 and/or P2X2/3 receptor antagonistic effect. A pharmaceutical composition having a P2X3 and/or P2X2/3 receptor antagonistic effect comprising a compoun
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Paragraph 0269; 0270
(2013/06/28)
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- PYRAZOLE DERIVATIVES, PREPARATION METHOD THEREOF, AND COMPOSITION FOR PREVENTION AND TREATMENT OF OSTEOPOROSIS CONTAINING SAME
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The present invention provides pyrazole derivative compounds and pharmaceutically acceptable salts thereof. The compounds of the present invention have an excellent effect of preventing and treating osteoporosis.
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Page/Page column 7
(2012/09/22)
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- Process for Preparing Bicyclic Pyrazolyl
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A process for preparing compounds of Formula (I) is described herein. The compounds have been shown to act as cannabinoid receptor ligands and are therefore useful in the treatment of disease linked to the mediation of the cannabinoid receptors in animals.
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Page/Page column 14
(2010/11/28)
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- PYRAZOLE COMPOUNDS HAVING CANNABINOID RECEPTOR (CB1) ANTAGONIZING ACTIVITY
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The present invention relates to a pyrazole compound having potent CB1-antagonizing activity, having the following formula [I]: wherein R1 and R2 are the same or different and an optionally substituted aryl group etc., R3 is an alkyl group etc., E is one of the following groups of the formula (i) to (iv): Q1 is a single bond, an alkylene group or a group of the formula: -N(R7)-, R7 is a hydrogen atom or an alkyl group, Q2 is a single bond, an oxygen atom or an alkylene group, R4 is a cycloalkyl group, a group of the formula: -N(R5)(R6) etc., one of R5 and R6 is a hydrogen atom or an alkyl group and the other is an alkyl group, a group of the formula: -N(R8)(R9) etc., D is an oxygen atom etc., RA1 is an amino group etc., RA2 is an optionally substituted aliphatic heterocyclic group, R is an alkyl group optionally substituted by one to three halogen atom(s) etc., one of R8 and R9 is a hydrogen atom or an alkyl group and the other is an alkyl group etc., or a pharmaceutically acceptable salt thereof.
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Page/Page column 110-111
(2008/06/13)
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- Bicyclic pyrazolyl and imidazolyl compounds and uses thereof
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Compounds of Formula (I) are described herein. The compounds have been shown to act as cannabinoid receptor ligands and are therefore useful in the treatment of diseases linked to the mediation of the cannabinoid receptors in animals.
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Page/Page column 29
(2010/02/11)
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- 1-ARYL-2-ACYLAMINO-ETHANE COMPOUNDS AND THEIR USE AS NEUROKININ ESPECIALLY NEUROKININ 1 ANTAGONISTS
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1-Aryl-2-acylaminoethane compounds of formula I STR1 wherein R. sub.1-R 4, X and Am are as defined in the description, have valuable pharmaceutical properties and are especially effective as NK-1 antagonists.
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- 5-alkyl-2-(alkylthio)-6-(2,6-dihalophenylmethyl)-3,4-dihydropyrimidin- 4(3H)-ones: Novel potent and selective dihydro-alkoxy-benzyl-oxopyrimidine derivatives
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Molecular modeling analysis of compounds belonging to the recently published series of dihydro-alkoxy-benzyl-oxopyrimidines (DABOs), such as S- DABOs and DATNOs, gave support to the design of new 2,6-disubstituted benzyl- DABO derivatives as highly potent
- Mai, Antonello,Artico, Marino,Sbardella, Gianluca,Massa, Silvio,Novellino, Ettore,Greco, Giovanni,Loi, Anna Giulia,Tramontano, Enzo,Marongiu, Maria Elena,La Colla, Paolo
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p. 619 - 627
(2007/10/03)
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- A pyrazole to furan rearrangement. Thermolysis of 5-Azido-4-formylpyrazoles
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5-Azido-3-benzyl-4-formyl-1-phenylpyrazoles 1a-c extrude dinitrogen upon heating in toluene to give the corresponding nitrenes, which immediately rearrange via a new ring-opening ring-closure reaction to produce an equimolar mixture of 4-cyano-2-phenyl-3-phenylazofurans 2a-c and 3-benzyl-4-cyano-1-phenylpyrazoles 3a-c. The formation of the 4-cyano-2-phenyl-3-phenylazofurans 2a-c is the first example in the pyrazole series of a nitrene rearrangement, in which the parent heterocyclic system of the product differs from that of the starting material. The isolation of equimolar amounts of the two products points to the fact that their formation occurs by two mechanistically interconnected pathways, between which the exchange of a redox equivalent takes place. Evidence for the existence of two mechanistically interlinked pathways is presented, and the insight into the stoechiometry of the reaction is taken advantage of to optimize the reaction with respect to either of the two products 2 or 3. Thus, it is demonstrated how one can bias the two pathways using external reagents, thereby changing the product distribution ratio 2:3 from 1:1 in the unbiased case, to 1:4 in one direction, and to better than 20:1 in the other direction.
- Svenstrup, Niels,Simonsen, Klaus B.,Thorup, Niels,Brodersen, Jorgen,Dehaen, Wim,Becher, Jan
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p. 2814 - 2820
(2007/10/03)
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