作者:S. Leue、W. Miao、A. Kanazawa、Y. Génisson、S. Garçon、A. E. Greene
DOI:10.1039/b109071m
日期:2001.11.15
(5S)-5-Benzyloxy-5-ethyl-6-oxo-5,6-dihydro-2H-pyran-3-carboxylic acid, the protected E-ring moiety of (S)-camptothecin, has been rapidly prepared in enantiomerically enriched form (98% ee) through enolate conjugate addition to a β-bromo methacrylate derivative, followed by enzymatic resolution with PLE.
(5S)-5-苄氧基-5-乙基-6-氧代-5,6-二氢-2H-吡喃-3-羧酸((S)-喜树碱的受保护 E 环分子)是通过与β-溴甲基丙烯酸酯衍生物进行对映体共轭加成,然后用 PLE 进行酶解而快速制备的对映体富集形式(ee 值为 98%)。