Abstract

The conjugate addition of Ti “ate” complexes of ketone and ester enolates to α,β-unsaturated carbonyl compounds was studied. The reaction was found to be highly regio- and stereoselective. Compared to the lithium enolates, ketone enolate Ti complexes showed an improved 1,4-regioselectivity. t-Butyl propionate enolate Ti complex gave the opposite stereochemical results compared to the parent lithium enolate.

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