New effective catalysts for Mukaiyama-aldol and-Michael reactions: bismuth trichloride-metallic iodide systems

…, H Gaspard-Iloughmane, J Dubac, J Jaud…

Index: Roux, Christophe Le; Gaspard-Iloughmane, Hafida; Dubac, Jacques; Jaud, Joel; Vignaux, Pierre Journal of Organic Chemistry, 1993 , vol. 58, # 7 p. 1835 - 1839

Full Text: HTML

Citation Number: 78

Abstract

11 additives gave either a very fast (NaI, CsI) or an instantaneous exothermic reaction (ZnI2, SnI2). The stoichiometry of the catalytic mixtures has been varied (Table I, entries 2-6), and the catalytic power for the BiCl3 plus xNaI system was greatest when x= 3. Thus, other systems employed a Bi/I ratio of 1: 3. Ultrasound has a marked influence on the activity of these catalysts. Commercial BiC13 treated in CH2C12 during 1 h with ultrasound ...