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Paper | Regular issue | Vol 43, No. 7, 1996, pp.1459-1464
Published online, 1st January, 1970
DOI: 10.3987/COM-96-7455
Convenient Preparation of 3-Methoxycarbonylpyridazines by Palladium Catalyzed Alkoxycarbonylation of Pyridazinetriflates

Markus Rohr, Dominique Toussaint, Saïd Chayer, Andre Mann,* Jean Suffert , and Camille-Georges Wermuth

*Laboratoire de Pharmacochimie Moleculaire, Centre de Neurochimie du CNRS, 5, rue Blaise Pascal, 67084 Strasbourg-Cedex, France

Abstract

The methoxycarbonylation of several pyridazine-trifluoromethanesulphonates with CO and MeOH is catalyzed by Pd(OAc)2 and 1,1’-bis(diphenylphosphino)ferrocene. This method constitutes a mild and efficient homologation of pyridazinones.