Abstract

An electrochemical method to synthesize cationic palladium complexes has been developed. Their counter anions could be changed readily by the electrolyte. The reaction could be incorporated into electro-oxidative palladium catalyzed reactions, such as Wacker-type reaction, homo-coupling of arylboronic acids, oxidative Sonogashira-type coupling, and Glaser-type coupling of terminal alkynes. These reactions exhibited a wide scope and a variety of products were obtained in high yields due to high activity of electrogenerated palladium species. We also developed site-selective sequential reactions by the integration of the electro-oxidative coupling reactions with non-electrochemical reactions. The reaction site could be controlled completely by the on/off application of electricity.

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