我们报告了我们在开发以 3-烷基羟吲哚作为亲核试剂的 Mo 催化的不对称烯丙基烷基化反应方面所做的工作。就羟吲哚亲核试剂的范围而言,该反应与 Pd 催化反应互补。许多3-烷基羟吲哚在温和条件下成功烷基化,得到具有优异收率和良好对映选择性的产品。据报道,该方法应用于制备二氢吲哚生物碱,如 (-)-毒扁豆碱、ent- (-)-去溴氟曲明 B 和 communesin B 的吲哚啉喹啉环。
NOVEL PICOLINAMIDE-CINCHONA ORGANOCATALYSTS AND DERIVATIVES
申请人:UNIVERSIDADE DE ÉVORA
公开号:US20160236184A1
公开(公告)日:2016-08-18
The present application describes a novel type of picolinamide-cinchona organocatalyst that allows for the successful transformation of ketimines to chiral amines with very high enantioselectivities and with the highest TOFs reported for any particular organocatalyst to date. These organocatalysts have also been immobilized to a variety of solid supports, including magneto-nanoparticles.
Highly chemoselective, sterically sensitive NHC-catalysed amine acylation with pyridil
作者:Amy C. Maguire、Vikas Kumar、Stephen J. Connon
DOI:10.1039/c9cc06937b
日期:——
A new strategy for the protection of amines has been developed involving reaction with pyridil under the influence of N-heterocyclic carbene catalysis. The methodology is capable of distinguishing between two amines characterised by small differences in steric bulk and the resulting pyridoyl amides can be cleaved without requiring either strongly acidic or basic hydrolysis.