New Syntheses of Bismuthonium Salts, Bismuthonium Ylides and Bismuthane Imides Using Triarylbismuth(V)-Oxo and -Hydroxo Compounds

Abstract

Triarylbismuth(V)-oxo and -hydroxo compounds react with organoboronic acids and esters in the presence of BF 3 .OEt 2 to afford the corresponding bismuthonium salts. They also undergo dehydrative coupling with cyclic 1,3-dicarbonyl compounds. amides and sulfonamides to give stabilized bismuthonium ylides, bismuthane N-acylimides and bismuthane N-sulfonylimides, respectively. All reactions proceed efficiently under mild conditions.