Enantioselective Friedel-Crafts Alkylation of 4,7-Dihydroindoles with Enones Catalyzed by Primary-Secondary Diamines
作者:Liang Hong、Wangsheng Sun、Chunxia Liu、Lei Wang、Kwokyin Wong、Rui Wang
DOI:10.1002/chem.200901635
日期:2009.10.26
selectivity: A primary–secondary diamine catalyst 1 was readily prepared from a commercially available amino acid and has been applied in the asymmetric Friedel–Crafts alkylation of 4,7‐dihydroindoles with α,β‐unsaturated enones. A series of aromatic, aliphatic, and cyclic α,β‐unsaturated ketones can be converted into the desired products in moderate to high yields with excellent enantioselectivities (up to
优异的选择性:伯-仲二胺催化剂1易于从市售氨基酸制备,并已用于4,7-二氢吲哚与α,β-不饱和烯酮的不对称Friedel-Crafts烷基化反应。在温和条件下,一系列芳族,脂肪族和环状α,β-不饱和酮可以中等至高收率转化成所需的产品,并具有出色的对映选择性(最高97%ee)。