Palladium-Catalyzed Synthesis of Highly Substituted Endocyclic Enol Lactones via a Three-Component Coupling Reaction in an Ionic Liquid
作者:Yu Li、Zhengkun Yu、Howard Alper
DOI:10.1021/ol070231b
日期:2007.4.1
[reaction: see text] A new, efficient ionic liquid based synthetic procedure was developed for the preparation of highlysubstituted endocyclic enol lactones via the carbonylation couplingreactions of alkynes and 1,3-diketones in ionic liquid. The reactions proceeded in excellent regioselectivity and in reasonably good yields. The catalyst system can be recycled five times with only modest loss of