Reversible C–C Bond Activation Enables Stereocontrol in Rh-Catalyzed Carbonylative Cycloadditions of Aminocyclopropanes
作者:Megan H. Shaw、Niall G. McCreanor、William G. Whittingham、John F. Bower
DOI:10.1021/ja511335v
日期:2015.1.14
cycloaddition with tethered alkenes to provide stereochemically complex N-heterocyclic scaffolds. These processes rely upon the generation and trapping of rhodacyclopentanone intermediates, which arise by regioselective, Cbz-directed insertion of Rh and CO into one of the two proximal aminocyclopropane C-C bonds. For cyclizations using cationic Rh(I)-systems, synthetic and mechanistic studies indicate that rhodacyclopentanone
在暴露于中性或阳离子 Rh(I)-催化剂体系后,氨基取代的环丙烷与系链烯烃发生羰基化环加成反应,以提供立体化学复杂的 N-杂环支架。这些过程依赖于环戊酮中间体的产生和捕获,其通过区域选择性、Cbz 定向将 Rh 和 CO 插入到两个近端氨基环丙烷 CC 键之一中而产生。对于使用阳离子 Rh(I) 系统的环化,合成和机理研究表明,环戊酮的形成是可逆的,并且烯烃插入步骤决定了产物的非对映选择性。这种机制有助于对烯烃系链上的取代基进行高水平的立体控制。
MST1 kinase inhibitors and methods of their use
申请人:Augeri David John
公开号:US08440652B2
公开(公告)日:2013-05-14
Compounds for the inhibition of mammalian Ste20-like kinase 1 (MST1) are disclosed, along with compositions comprising them and methods of their use in the treatment, management or prevention of an inflammatory or autoimmune diseases or disorders. Particular compounds are of the formula:
Compounds for the inhibition of mammalian Ste20-like kinase 1 (MST1) are disclosed, along with compositions comprising them and methods of their use in the treatment, management or prevention of an inflammatory or autoimmune diseases or disorders.