Cinnamylzinc reagents react with cyclic and acyclic alpha-chiral ketones under very mild conditions (-78 degrees C, 1 h), yielding the corresponding homoallylic alcohols bearing three adjacent stereocenters with high diastereoselectivity. An extension of this reaction to enantioenriched alpha-chiral ketones is also described.
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Dunet et al. (2007) studied this question.
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