A novel aldehyde, 4-formylcyclohexane-1,2-dicarboxylic acid, is prepared by the reaction of 4-cyclohexene-1,2-dicarboxylic acid with hydrogen and carbon monoxide in the presence of a hydroformylation catalyst. Products in which hydrogen of the ring is substituted by other groups, and derivatives of the carboxyl groups, may also be prepared. Useful catalysts include rhodium carbonyl complex compounds with tertiary phosphine ligands with excess of the tertiary phosphine ligands.
4- 甲酰基
环己烯-1,2-二
羧酸是由
4-环己烯-1,2-二羧酸与
氢气和
一氧化碳在加氢甲酰化催化剂存在下反应制备而成。也可以制备环中氢被其他基团取代的产品以及羧基的衍
生物。有用的催化剂包括含有过量叔
膦配体的
铑羰基络合物。