Aminal-Pyrrolidine Organocatalysts - Highly Efficient and Modular Catalysts for α-Functionalization of Carbonyl Compounds
作者:Adrien Quintard、Sébastien Belot、Estelle Marchal、Alexandre Alexakis
DOI:10.1002/ejoc.200901283
日期:2010.2
2-position, gave a synergistic effect leading to two powerful complementary organocatalysts. They show excellent enantiocontrol in the -functionalization of a wide range of linear/branched aldehydes and ketones, including Michael additions to ethenediyl disulfones or nitrostyrene and -amination. We obtained ees up to 98.5 % with low catalyst loadings (down to 1 mol-%). As a proof of efficiency, TOFs of up to
羟基脯氨酸的 4-位被 aphenol 基团取代,连同 2-位上的氨基,产生协同效应,产生两种强大的互补有机催化剂。它们在广泛的线性/支化醛和酮的 - 官能化中表现出出色的对映控制,包括迈克尔加成到乙二基二砜或硝基苯乙烯和 - 胺化。我们以低催化剂负载量(低至 1 mol%)获得了高达 98.5% 的 ees。作为效率的证明,可以获得高达 1000 h-1 的 TOF。