Manganese-Promoted, Titanocene-Catalyzed Stereoselective Pinacol Coupling of Aldehydes

Abstract

Aromatic and aliphatic aldehydes undergo pinacol coupling when treated with Mn/Me3SiCl in the presence of Cp2TiCl2 as catalyst. Good yields of bis-silyl pinacol ethers are obtained with varying degrees of diastereoselectivity. Enantioselective pinacolization has been achieved using an enantiomerically enriched catalyst