The first asymmetric Cu-catalyzed conjugate addition of dialkylzinc zinc reagents to a large scope of enals in presence of phosphoramidite, SimplePhos, or (R)-BINAP ligands with enantiomeric excesses up to 90% is reported. Moreover, ACA of Grignard reagents afforded moderate to good 1,4-regioselectivities with enantioselectivities up to 90%.
Regio- and Stereoselective Synthesis of Allylic and Homoallylic Alcohols by the Reductive Desulfonylation of Allylic Sulfone Derivatives. Application to the Syntheses of (±)-Lavandulol and Isolavandulol
Regio- and stereoselective desulfonylation of β-tosylhomoallylic alcohols provided a convenient method for the preparation of allylic and homoallylicalcohols. (±)-Lavandulol and isolavandulol were synthesized in excellent yields by this method.