Efficient Synthesis of Novel γ-Substituted γ-Butenolides by Lewis Acid Catalyzed Addition of Metal Enolates of Active Methylene Compounds to Mucohalic Acids
作者:Ji Zhang、Koushik Das Sarma、Timothy T. Curran、Daniel T. Belmont、James G. Davidson
DOI:10.1021/jo050538t
日期:2005.7.1
Lewis acid catalyzed addition of activemethylenecompounds to mucochloric acid (1) and mucobromic acid (2) affording Knoevenagel aldol adducts, γ-substituted γ-butenolides, has been explored. Catalytic efficiencies of various Lewis acids have been compared. Indium acetate (0.25−5 mol %) was found to be the most efficient catalyst.