Bi(III) carboxylates as efficient reagents for preparation of esters under mild conditions.A new method for the protection of carboxylic acids

摘要

Bi(III) carboxylates have been obtained by reaction of triphenylbismuth with various monocarboxylic acids.By a ligand-exchange reaction,these Bi(III) carboxylates react with tertiary or benzylic-type bromides and afford esters.This reaction sequence constitutes a new efficient way for the temporary protection of carboxylic acids under mild conditions.