Soluble Polymer-Supported Chemoenzymatic Synthesis of the C<sub>21</sub>−C<sub>27</sub> Fragment of the Bryostatins
作者:José A. López-Pelegrín、Paul Wentworth,、Frank Sieber、William A. Metz、Kim D. Janda
DOI:10.1021/jo005539u
日期:2000.12.1
A chemoenzymatic synthesis of the C(21)-C(27) fragment of the marine macrolide family of bryostatin antibiotics is presented. The approach commences from achiral starting materials and has as its crucial step the enzymatic resolution of a racemic mixture of soluble polymer-supported alcohols (syn-10 and syn-11). The immobilized lipase from Candida antarctica (Novozym 435) catalyzes the enantioselective
介绍了化学的酶促合成的海洋大环内酯类抑菌素抗生素的C(21)-C(27)片段。该方法从非手性原料开始,并将其作为酶解可溶性聚合物负载的醇(syn-10和syn-11)的外消旋混合物的关键步骤。来自南极假丝酵母的固定化脂肪酶(Novozym 435)催化syn-10的对映选择性乙酰化(40%的转化率和> 99%ee),从而从其对映体切割后分离出对映体纯净形式的关键中间体(R)-14。聚乙二醇(PEG)支架。PEG基质与多聚体酶促转化均兼容,并且可以在整个合成过程中对所有中间体进行快速纯化和简便的NMR表征。