Enantioselective synthesis of methyl (5Z,8S)-8,9-epoxynon-5-enoate, an eicosanoid synthon
作者:M. A. Lapitskaya、L. L. Vasiljeva、K. K. Pivnitsky
DOI:10.1007/s11172-007-0257-z
日期:2007.8
A six-step synthesis of methyl (5Z,8S)-8,9-epoxynon-5-enoate, a known synthon of constanolactones and hepoxilins, from 5-hexynoic ester was developed. The enantiomeric purity of the synthon was attained by S-enantiodirected dihydroxylation of a double bond in the intermediate methyl non-8-en-5-ynoate with subsequent enantioselective hydrolysis of the epoxide group in the admixture of the minor R-enantiomer.
本研究开发了一种从 5-己炔酸酯经六步合成 (5Z,8S)-8,9-环氧乙烷-5-烯酸甲酯的方法,这是一种已知的正己内酯和环紫杉素的合成物。通过对中间体非 8-en-5-ynoate 甲酯中的双键进行 S-enantiodirected dihydroxylation(S-对映体定向二羟基化),然后在混有次要 R-enantiomer 的情况下对环氧基团进行对映体选择性水解,从而获得对映体纯度较高的合成物。