Convenient Syntheses of Optically Active .BETA.-Lactams by Enzymatic Resolution.
作者:Hazuki NAGAI、Tatsushi SHIOZAWA、Kazuo ACHIWA、Yoshiyasu TERAO
DOI:10.1248/cpb.41.1933
日期:——
Optically active β-lactams were synthesized by lipase-catalyzed kinetic resolution using the enantioselective hydrolysis of N-acyloxymethyl β-lactams (3) in an organic solvent and the transesterification of N-hydroxymethyl β-lactams (2) with vinyl acetate. A variety of highly optically pure β-lactams (2 and 3) possessing some substituents at the 3, 4, or both positions were obtained and the optically active N-hydroxymethyl β-lactams prepared were converted into useful N-unsubstituted ones without racemization.
通过脂肪酶催化的动力学分辨,合成了光学活性的β-内酰胺,利用N-酰氧甲基β-内酰胺(3)在有机溶剂中的对映选择性水解以及N-羟甲基β-内酰胺(2)与乙烯基醋酸酯的转酯化反应。获得了多种在3、4位或两者位置具有一些取代基的高光学纯度的β-内酰胺(2和3),所制备的光学活性的N-羟甲基β-内酰胺在不发生消旋化的情况下转化为有用的N-无取代基的形式。