A Versatile Strategy for Divergent and Diastereoselective Synthesis of Natural Product-Like Polyhydroxylated Indolizidines
作者:Xiao-Ping Jiang、Ying Cheng、Gao-Feng Shi、Zhi-Mei Kang
DOI:10.1021/jo0624290
日期:2007.3.1
A general and versatile method for the divergent and diastereoselective synthesis of polyhydroxylated indolizidines has been established. The annulation reactions of a readily available enantiopure dihydroxylated cyclic secondary enamine with α,β-unsaturated carboxylates including methyl acrylate, methyl crotonate, methyl 2-hexenoate, allenoate, and dimethyl acetylenedicarboxylate and with malonyl
已经建立了用于发散和非对映选择性合成多羟基化吲哚并立定的通用且通用的方法。容易获得的对映纯二羟基化环仲烯胺与α,β-不饱和羧酸酯(包括丙烯酸甲酯,巴豆酸甲酯,2-己烯酸甲酯,烯丙酸酯和乙酰二甲基二甲酯)和丙二酰氯的环化反应可生成六氢或四氢-5-吲哚并酮- 8-羧酸盐收率高。通过实际的氢化和还原反应,将得到的5-吲哚嗪酮衍生物以良好的收率转化成各种多羟基化的吲哚唑烷。