The bifunctional thiourea–tertiary amine derivatives of simple chiral diamines serve as highly enantioselective catalysts for the Michael addition of α-substituted cyanoacetates to vinyl sulfones, giving an efficient protocol for the construction of an all-carbon substituted quaternary stereocentre.
Synergistic Effect of a Bis(proazaphosphatrane) in Mild Palladium-Catalyzed Direct α-Arylations of Nitriles with Aryl Chlorides
作者:So Han Kim、Wonseok Jang、Min Kim、John G. Verkade、Youngjo Kim
DOI:10.1002/ejoc.201402466
日期:2014.9
The effect of a bis(proazaphosphatrane) ligand on the palladium-catalyzed direct α-arylation of nitriles with various arylchlorides under mild conditions is reported. Comparisons of the catalytic properties of this ligand with those of three related mono(proazaphosphatrane)s under the same reaction conditions revealed that bis(proazaphosphatrane) displayed a synergistically enhanced activity. In the
Deacylative Allylation: Allylic Alkylation via Retro-Claisen Activation
作者:Alexander J. Grenning、Jon A. Tunge
DOI:10.1021/ja205717f
日期:2011.9.21
"deacylative allylation", the coupling partners, an allylic alcohol and a ketone pronucleophile, undergo in situ retro-Claisen activation to generate an allylic acetate and a carbanion. In the presence of palladium, these reactive intermediates undergo catalytic coupling to form a new C-C bond. In comparison to unimolecular decarboxylative allylation, a commonly utilized method for allylation of carbon
本文描述了多种相对不稳定的碳亲核试剂的烯丙基烷基化的新方法。在这个“脱酰基烯丙基化”过程中,偶联伙伴,烯丙醇和酮亲核试剂,进行原位逆克莱森活化以生成烯丙乙酸和碳负离子。在钯的存在下,这些反应性中间体进行催化偶联形成新的 CC 键。与单分子脱羧烯丙基化(一种常用的碳阴离子烯丙基化方法)相比,脱酰基烯丙基化是一种分子间过程。此外,脱酰基烯丙基化允许容易获得的烯丙醇直接偶联。最后,通过快速构建多种 1、
SUBSTITUTED N-ARYLETHYL-2-ARYLQUINOLINE-4-CARBOXAMIDES AND USE THEREOF
申请人:Bayer Aktiengesellschaft
公开号:US20200031775A1
公开(公告)日:2020-01-30
The present application relates to novel substituted N-arylethyl-2-arylquinoline-4-carboxamide derivatives, to processes for preparation thereof, to the use thereof alone or in combinations for treatment and/or prevention of diseases, and to the use thereof for production of medicaments for treatment and/or prevention of diseases, especially for treatment and/or prevention of fibrotic and inflammatory disorders.
An Efficient and Mild CuI/<scp>l</scp>-Proline-Catalyzed Arylation of Acetylacetone or Ethyl Cyanoacetate
作者:Yongwen Jiang、Nan Wu、Haihong Wu、Mingyuan He
DOI:10.1055/s-2005-918921
日期:——
The coupling reaction of aryl iodides with acetylacetone or ethyl cyanoacetate under catalysis of CuI/l-proline works at relatively mild conditions to provide 3-aryl-2, 4-pentanediones and α-aryl cyanoacetates in moderate to good yields.