Titanocene(III)-promoted Barbier-type crotylation of carbonyl compounds

J Org Chem. 2011 Jan 21;76(2):732-5. doi: 10.1021/jo102269d. Epub 2010 Dec 29.

Abstract

A mild, highly regio- and stereoselective method for the crotylation of aldehydes and ketones mediated/catalyzed by titanocene(III) is described. Optimized conditions permit the selective generation of γ-adducts in high yields together with high stereoselectivity, with a predominance of anti stereoisomers.