Em. Keramane et al., Bi(III) carboxylates as efficient reagents for preparation of esters undermild conditions. A new method for the protection of carboxylic acids, TETRAHEDR L, 42(5), 2001, pp. 855-857
Bi(III) carboxylates have been obtained by reaction of triphenylbismuth wit
h various monocarboxylic acids. By a ligand-exchange reaction, these Bi(III
) carboxylates react with tertiary or benzylic-type bromides and afford est
ers. This reaction sequence constitutes a new efficient way for the tempora
ry protection of carboxylic acids under mild conditions. (C) 2001 Elsevier
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