Asymmetric β-boration of α,β-unsaturated carbonyl compounds promoted by chiral rhodium–bisoxazolinylphenyl catalysts

Chiral rhodium–bisoxazolinylphenyl acetate complexes exhibited high catalytic activity for the β-boration of α,β-unsaturated carbonyl compounds with bis(pinacolato)diboron in the presence of sodium t-butoxide with enantioselectivity up to 97%.