An efficient enzymatic preparation of 20-pregnane succinates: chemoenzymatic synthesis of 20β-hemisuccinyloxy-5αH-pregnan-3-one
作者:Leandro N. Monsalve、Mayra Y. Machado Rada、Alberto A. Ghini、Alicia Baldessari
DOI:10.1016/j.tet.2007.12.006
日期:2008.2
Lipase-catalyzedtransesterification of the 20 hydroxyl group in a series of pregnanes afforded novel 20-ethyl succinates that are not possible to prepare following the traditional synthetic methods. The reaction is stereoselective. The enzyme reacts selectively with the 20β epimers therefore only the 20β-succinyloxy derivatives are obtained. These compounds are obtained in variable yield, depending