Ca. Dvorak et Vh. Rawal, CATALYSIS OF BENZOIN CONDENSATION BY CONFORMATIONALLY-RESTRICTED CHIRAL BICYCLIC THIAZOLIUM SALTS, Tetrahedron letters, 39(19), 1998, pp. 2925-2928
Two new conformationally-restricted chiral bicyclic thiazolium salts h
ave been synthesized by a concise, high-yielding route. These salts ar
e effective catalysts for the benzoin condensation, affording benzoin
in 20-30% yield, with a similar range of enantiomeric excesses. (C) 19
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