申请人:A. E. Staley Manufacturing Company
公开号:US04617405A1
公开(公告)日:1986-10-14
Alpha, beta carbonyl compounds are prepared from an acid anhydride selected from the group consisting of glutaric anhydride and 3-alkyl glutaric anhydride, and a beta-hydroxy carbonyl compound having the following chemical formula: R.sub.2 COH--CHR--CRO or R.sub.2 COH--CHR--CN where each R is any substitutent group. The process comprises: (a) reacting the acid anhydride and the beta-hydroxy carbonyl compound in the presence of a catalytically effective amount of an acid catalyst to form an ester; (b) reacting the ester in the presence of a catalytically effective amount of a base catalyst to form a alpha, beta-unsaturated carbonyl compound and a carboxylic acid; and (c) separating the alpha, beta-unsaturated carbonyl compound and the carboxylic acid.
α,β羰基化合物是由选择自戊二酸酐和3-烷基戊二酸酐的羧酸酐和具有以下化学式的β-羟基羰基化合物制备的:R.sub.2 COH-CHR-CRO或R.sub.2 COH-CHR-CN,其中每个R都是任何取代基。该过程包括:(a)在酸催化剂的催化下反应羧酸酐和β-羟基羰基化合物以形成酯;(b)在碱催化剂的催化下反应酯以形成α,β-不饱和羰基化合物和羧酸;(c)分离α,β-不饱和羰基化合物和羧酸。