Organocatalytic Asymmetric Mannich Reaction of 3-Hydroxyoxindoles/3-Aminooxindoles with in Situ Generated <i>N</i>-Boc-Protected Aldimines for the Synthesis of Vicinal Oxindole–Diamines/Amino Alcohols
作者:Jing Shan、Baodong Cui、Yu Wang、Chengli Yang、Xiaojian Zhou、Wenyong Han、Yongzheng Chen
DOI:10.1021/acs.joc.6b00278
日期:2016.7.1
A highly efficient asymmetric Mannich reaction of 3-monosubstituted 3-aminooxindoles/3-hydroxyoxindoles with in situ generated N-Boc-protected aldimines catalyzed by the chiral bifunctional thiourea–tertiary amine catalyst has been developed. Under mild reaction conditions, a series of structurally diverse vicinal oxindole–diamines/amino alcohols were smoothly obtained in moderate to high yields (up
已经开发了由手性双官能硫脲-叔胺催化剂催化的3-单取代的3-氨基氧吲哚/ 3-羟基氧吲哚与原位生成的N -Boc保护的醛亚胺的高效不对称曼尼希反应。在温和的反应条件下,可以中等至高收率(高达99%)顺利获得一系列结构多样的邻位羟吲哚-二胺/氨基醇,非对映选择性和对映选择性(高达95:5 dr和96%ee) 。手性邻位羟吲哚-二胺/氨基醇向螺环型羟吲哚的多功能转化也证明了该方案的综合应用。