Synthesis of α-diazo-β-hydroxyesters through a one-pot protocol by phase-transfer catalysis: application to enantioselective aldol-type reaction and diastereoselective synthesis of α-amino-β-hydroxyester derivatives
作者:Kazuya Hasegawa、Shigeru Arai、Atsushi Nishida
DOI:10.1016/j.tet.2005.11.028
日期:2006.2
The one-pot synthesis of α-diazo-β-hydroxyesters from sodium azide under phase-transfer-catalyzed conditions has been achieved. This protocol includes three different chemical transformations promoted by a single catalyst in each step to give products in good to excellent yields. The reaction was applied to a catalytic asymmetric aldol-type reaction using α-diazoesters with aldehydes in the presence
在相转移催化条件下,已经可以从叠氮化钠一锅法合成α-重氮-β-羟基酯。该方案包括在每个步骤中由一种催化剂促进的三种不同的化学转化,以产生具有良好收率的优良产品。在手性季铵盐存在下,使用α-重氮酸酯与醛将反应应用于催化不对称的醛醇缩醛型反应,并得到ee高达81%的产物。还描述了产物向手性α-氨基-β-羟基酯衍生物的非对映选择性转化。