Process for the preparation of an alkylidene diester by reacting an ethylenically unsaturated compound with carbon monoxide, a carboxylic acid and an aldehyde in the presence of a catalytic system prepared by combining palladium or a palladium compound, at least 5 mol of a phosphine having three aryl groups, per gram atom of palladium, and with an acid with a pK. < 2 (at 18 'C in aqueous solution), except hydrohalogenic and carboxylic acids, as promoter.
一种亚烷基二酯的制备方法,该方法是将一种
乙烯基不饱和化合物与
一氧化碳、一种
羧酸和一种醛在一种催化体系存在下进行反应,该催化体系是由
钯或
钯化合物、每克
钯原子至少含有 5 摩尔具有三个芳基的膦以及一种 pK.<2(18'C 水溶液中)的酸(氢卤酸和羧酸除外)作为
促进剂。