A new chemoenzymatic Baylis–Hillman approach for the synthesis of enantiomerically enriched umbelactones
作者:Ahmed Kamal、Tadiparthi Krishnaji、P. Venkat Reddy
DOI:10.1016/j.tetlet.2007.07.139
日期:2007.10
An efficient and convenient strategy for the enantioselective synthesis of enantiomerically enriched umbelactones is described utilizing a lipase-mediated resolution protocol, Baylis–Hillman reaction and ring closing metathesis as key steps. The lipase-resolution is carried out using several lipases from various sources in different solvents to afford the required intermediate 8 in good yield and high
描述了利用脂肪酶介导的拆分方案,Baylis-Hillman反应和闭环易位为关键步骤的对映体富集的伞形内酯的对映选择性合成的高效便捷策略。使用来自不同来源的几种脂肪酶在不同溶剂中进行脂肪酶拆分,以高收率和高对映选择性提供所需的中间体8。