Patent ID: 6500962
Filing Date: 2002-12-31
Classification: C07D

Abstract:
A method for synthesizing an &agr;-methylene-&ggr;-butyrolactone by reacting an alene compound having the following formula (I) with carbon monoxide in the presence of a catalyst containing ruthenium: in whichR is hydrogen or C1-C5 low alkyl group; X is selected from the group consisting of C, O, S and N, provided that when X is C, X is substituted with one selected from the group consisting of hydrogen, C1-C5 low alkyl and diethylester group, and when X is N, X is substituted with one selected from the group consisting of hydrogen, tosyl group, t-butyloxycarbonyl group and diethylester group; and n is 1 or 2.