[EN] AZAINDAZOLES AS BTK KINASE MODULATORS AND USE THEREOF<br/>[FR] AZAINDAZOLES COMME MODULATEURS DE LA KINASE BTK ET LEUR UTILISATION
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2011019780A1
公开(公告)日:2011-02-17
Compounds having the formula (I), and enantiomers, and diastereomers, pharmaceutically-acceptable salts, thereof, (I) are useful as kinase modulators, including Btk modulation, wherein A1, A2, A3, R4, are as defined herein.
Highly Enantioselective Construction of Fully Substituted Stereocenters Enabled by <i>In Situ</i> Phosphonium-Containing Organocatalysis
作者:Hongkui Zhang、Chunhui Jiang、Jian-Ping Tan、Hui-Lin Hu、Yayun Chen、Xiaoyu Ren、Hong-Su Zhang、Tianli Wang
DOI:10.1021/acscatal.0c01079
日期:2020.5.15
yields with excellent enantioselectivities (99.0 to >99.9% ee) under very low catalyst loading (0.5 mol %). The success of gram-level preparation and synthetic transformations proves the potential of this catalytic strategy for practical applications. Mechanisticinvestigation, including control experiments, in situ NMR analysis, and ESI-HRMS characterization of intermediates, provides insights into the
Rhodium-catalyzed chemo- and regioselective decarboxylative addition of β-ketoacids to alkynes
作者:Changkun Li、Christian P. Grugel、Bernhard Breit
DOI:10.1039/c6cc02272c
日期:——
A highly efficient rhodium-catalyzed chemo- and regioselective addition of [small beta]-ketoacids to alkynes is reported. Applying a Rh(I)/(S,S)-DIOP catalyst system, [small delta], [gamma]-unsaturated ketones were prepared with exclusively branched selectivity under mild...
Catalyst‐Free Synthesis of α‐Functionalized 2
<i>H</i>
‐Chromenes in Water: A Tandem Self‐Promoted
<i>pseudo</i>
‐Substitution and Decarboxylation Process
作者:Chunhui Jiang、Yayun Chen、Hongkui Zhang、Jian‐Ping Tan、Tianli Wang
DOI:10.1002/asia.201900641
日期:2019.9.2
protocol was also demonstrated by the scale-up synthesis and versatile conversions of the title product into other useful compounds. In addition, control experiments indicated that water was essential for the reactivity. Mechanistic studies further revealed that the reaction proceeded through a self-promoted tandem pseudo-substitution and decarboxylation process.
Rhodium-Catalyzed Chemo- and Regioselective Decarboxylative Addition of β-Ketoacids to Allenes: Efficient Construction of Tertiary and Quaternary Carbon Centers
作者:Changkun Li、Bernhard Breit
DOI:10.1021/ja411397g
日期:2014.1.22
A rhodium-catalyzedchemo- and regioselective intermolecular decarboxylative addition of β-ketoacids to terminalallenes is reported. Using a Rh(I)/DPPF system, tertiary and quaternary carbon centers were formed with exclusively branched selectivity under mild conditions. Preliminary mechanism studies support that the carbon-carbon bond formation precedes the decarboxylation and the reaction occurs