作者:Elisabetta Brenna、Claudio Fuganti、Piero Grasselli、Stefano Serra
DOI:10.1002/1099-0690(200104)2001:7<1349::aid-ejoc1349>3.0.co;2-9
日期:2001.4
synthesis of (S)- and (R)-verapamil is described. The key steps of the synthetic sequence are the enantioselective acetylation, mediated by Lipase PS, of allylic alcohol (Z)-(±)-2, affording the acetate derivative (Z,R)-(−)-3 (ee 92%) and the Ireland−Claisen rearrangement of this latter and of its enantiomer (Z,S)-(+)-3 (ee 92%) to afford acid derivatives (E,R)-(−)-4 (ee 94%) and (E,S)-(+)-4 (ee 93%)
描述了脂肪酶介导的 (S)-和 (R)-维拉帕米合成。合成序列的关键步骤是由脂肪酶 PS 介导的烯丙醇 (Z)-(±)-2 的对映选择性乙酰化,得到乙酸衍生物 (Z,R)-(-)-3 (ee 92%)后者及其对映异构体 (Z,S)-(+)-3 (ee 92%) 的 Ireland-Claisen 重排得到酸衍生物 (E,R)-(-)-4 (ee 94%) 和(E,S)-(+)-4 (ee 93%),分别是 (S)- 和 (R)-维拉帕米的前体。