Reactions of α-aryl-, α-heteroaryl-, and α-heteroatom-substituted masked alkenyllithiums with
aldehydes and ketones provide a general method for the synthesis of allylic alcohols substituted
with an aryl or heteroaryl in the β position and aryl, heteroaryl or alkyl substituents in the α
position via a [1,4]-C→O silicon rearrangement. In the case of reactions with enolizable aldehydes
and ketones, anhydrous CeCl3 was used as an additive. High diastereoselectivities are observed
for allyl alcohols produced from α-substituted aldehydes.