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An opening of vinyl oxiranes has been accomplished with Zn and Al enolates resulting from asymmetric conjugate addition reactions on cyclic enones. This novel tandem procedure affords the adducts in moderate to good yields, enantioselectivities up to 98%, and moderate to good cis/trans selectivities. This provides potentially useful synthetic substrates to prepare complex bicyclic compounds.
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Welker et al. (2010) studied this question.
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