Stereocontrol in Asymmetric SE′ Reactions of γ-Substituted α,β-Unsaturated Aldehydes
2014
Williams, David R. | Atwater, Bruce A. | Bawel, Seth | Ke, Pucheng | Gutierrez, Osvaldo | Tantillo, Dean J.
Asymmetric SE′ reactions of (E)- and (Z)-γ-substituted-α,β-unsaturated aldehydes have been studied for the stereocontrolled preparation of nonracemic alcohols. Mild exchange reactions of allylic stannanes provide access to chiral 1,3-bis(tolylsulfonyl)-4,5-diphenyl-1,3-diaza-2-borolidines. These reagents display reactivity with the γ-substituted α,β-unsaturated aldehydes, which is characterized by matched and mismatched elements of stereocontrol. Computational analysis (using density functional theory) provides valuable insights to guide reaction development.
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