The addition of y-disubstituted allylchromium (II1) reagents to aldehydes proceeds in a stereodivergent manner, in contrast to the case of y-monosubstituted allylchromium (II1) species. The method allows the preparation of a variety of homoallylic alcohols bearing a quaternary center of defined relative configuration in the a-position. The preparation of both stereomeric homoallylic alcohols 13 is possible by using either of the two (E)-or (2)-allylic ...
