A novel three-step synthesis of Celecoxib via palladium-catalyzed direct arylation
摘要:
A novel three linear step synthesis of Celecoxib was achieved in 33% overall yield via a key regioselective direct C-H arylation reaction between a 1,3-disubstituted pyrazole and an aryl bromide. (C) 2011 Elsevier Ltd. All rights reserved.
Silver-Mediated Cycloaddition of Alkynes with CF<sub>3</sub>CHN<sub>2</sub>: Highly Regioselective Synthesis of 3-Trifluoromethylpyrazoles
作者:Feng Li、Jing Nie、Long Sun、Yan Zheng、Jun-An Ma
DOI:10.1002/anie.201301870
日期:2013.6.10
Silver screen: The title reaction provides a convenient and efficient method for the construction of 5‐substituted 3‐trifluoromethylpyrazoles under mild reaction conditions. By using this protocol, the marketed drug Celecoxib (antiarthritic) could be easily synthesized (see scheme; DMF=N,N‐dimethylformamide).
Cycloaddition of Trifluoroacetaldehyde <i>N</i>-Triftosylhydrazone (TFHZ-Tfs) with Alkynes for Synthesizing 3-Trifluoromethylpyrazoles
作者:Hongwei Wang、Yongquan Ning、Yue Sun、Paramasivam Sivaguru、Xihe Bi
DOI:10.1021/acs.orglett.0c00395
日期:2020.3.6
(TFHZ-Tfs) and alkynes is reported. This protocol provides an operationally simple and general method for the synthesis of diverse 3-trifluoromethylpyrazoles in good to excellent yields with broad substrate scope, including aryl, heteroaryl, and alkyl terminalalkynes, and electron-deficient internalalkynes. The synthetic potential of this method was further demonstrated by the synthesis of an antiarthritic
A copper-mediatedsynthesis of 4-(trifluoromethyl)pyrazoles is described. In one step from readily accessible α,β-alkynic tosylhydrazones, a remarkable domino sequence of cyclization, trifluoromethylation, and detosylation takes place to furnish the 4-CF3N-H pyrazole cores with good functional group compatibility. The reaction conditions are mild and convenient, at room temperature in air, using the
描述了铜介导的4-(三氟甲基)吡唑的合成。从易于获得的α,β-炔基甲苯磺酰nes的一个步骤中,发生了显着的环化,三氟甲基化和脱甲苯基化的多米诺序列,为4-CF 3 N -H吡唑核提供了良好的官能团相容性。使用可商购的三氟甲基三甲基硅烷(TMSCF 3)作为CF 3源,在空气中于室温下,反应条件温和且方便。该方法可以应用于抗炎药塞来昔布的4-CF 3类似物的合成。
Efficient copper-catalyzed cross-coupling of nitrogen nucleophiles with N,N-dibenzyl-4-iodobenzenesulfonamide and its application in the synthesis of Celecoxib intermediate
the cross-coupling of N,N-dibenzyl-4-iodobenzenesulfonamide with nitrogen nucleophiles using 0.5–20 mol% of CuI underligand-freeconditions. A variety of nitrogen nucleophiles including nitrogenheterocycles, sulfonamides and amides afforded the corresponding products in moderate to good yields (up to 98%) under the optimized conditions. The application of this catalytic system to the synthesis of Celecoxib
[EN] AMINO SUBSTITUTED PYRIDINYL METHANONE COMPOUNDS USEFUL IN TREATING KINASE DISORDERS<br/>[FR] COMPOSES DE PYRIDINYL-METHANONE AMINO SUBSTITUES UTILES DANS LE TRAITEMENT DE TROUBLES INDUITS PAR LA KINASE
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2005051387A1
公开(公告)日:2005-06-09
The present invention provides amino substituted pyridinyl methanone compounds; pharmaceutical compositions comprising the compounds and methods of synthesis thereof. The compounds, which are cyclin dependent kinase (CDK) inhibitors, can be used to treat or ameliorate CDK mediated disorders. The invention thus also provides the therapeutic or prophylactic use of the compounds and/or pharmaceutical compositions to treat such disorders.