Benzimidazole-pyrrolidine/H+ (BIP/H+), a Highly Reactive Organocatalyst for Asymmetric Processes
作者:Eric Lacoste、Emilie Vaique、Muriel Berlande、Isabelle Pianet、Jean-Marc Vincent、Yannick Landais
DOI:10.1002/ejoc.200600664
日期:2007.1
e has been devised, which exhibits excellent activities in aminocatalyzed aldol reactions, leading to aldol products in high yields and enantioselectivities in the presence of an equimolar amount of a Bronsted acid. This organocatalyst has demonstrated remarkable reactivities in aldol processes even with equimolar amounts of aldehyde and ketone in THF. A discussion of the role of the Bronsted acid
已经设计了一种新的手性苯并咪唑-吡咯烷,它在氨基催化的羟醛反应中表现出优异的活性,在等摩尔量的布朗斯台德酸存在下,产生高产率和对映选择性的羟醛产物。即使在 THF 中使用等摩尔量的醛和酮,这种有机催化剂在羟醛过程中也表现出显着的反应性。讨论了布朗斯台德酸作为助催化剂的作用以及这种新型有机催化剂在罗宾逊退火和α-胺化过程中的一些应用。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)