Allylic alcohols of unexpected confirugation by oxazaborolidine-catalysed reduction of α,β-unsaturated ketones. An explanation based on MO calculations

Article abstract of DOI:10.1016/0957-4166(95)00357-U

While the reduction of most α,β-unsaturated ketones with BH₃:SMe₂ in the presence of (R)-B-methyl-4,5,5-triphenyl-1,3,2-oxazaborolidine [(R)-2] affords allylic alcohols of the S configuration, that of α,β-unsaturated ketones branched