Process for the preparation of cyclic carboxylic anhydrides

Details Process for the preparation of cyclic carboxylic anhydrides Process for the preparation of cyclic carboxylic anhydrides

C - Chemistry, Metallurgy

07

D

260/359.3, 260/3

C07D 307/60 (2006.01) C07C 51/56 (2006.01) C07D 309/32 (2006.01)

Patent

CA 1337126

Process for the preparation of cyclic anhydrides of alkanedioic acids having 4 or 5 carbon atoms in the ring, by reacting an alkenoic acid with CO in the presence of (a) a palladium compound, (b) a phosphine, arsine and/or stibine, and (c) a protonic acid having a pKa < 2.

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