ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 37, Number 10
JKCSEZ 37(10)
August 20, 1993 

Reaction mechanism of palladium(0, Ⅱ)-phosphines complexes catalyzed cyclocarbonylation for unsaturated carboxylic acid such as crotonic acid, methacrylic acid and 3-butenoic acid has been investigated by product analysis, molecular mechanics and extended Huckel molecular orbital method. Reaction of 3-butenoic acid with palladium(0, Ⅱ)-phosphines catalyst gives palladium containing cycloester through intermediate palladium-olefin π-complex in the catalytic carbonylation. Palladium(0, Ⅱ)-phosphines complexes catalyze the cyclocarbonylation of 3-butenoic acid to give 3-methylsuccinic anhydride and glutaric anhydride. But π-complexes with palladium(0, Ⅱ)-phosphines and unsaturated carboxylic acids such as crotonic acid and methacrylic acid are not effective the catalytic cyclocarbonylation.