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

Pin it down: A highly enantioselective diboration of terminal alkenes with chiral 1 and bis(pinacolato)diboron (B2 pin2 ) was realized. Subsequent oxidation of the diboron adducts with sodium peroxoborate readily gave the corresponding optically active 1,2-diols in high yields and high enantioselectivities.

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Eine enantioselektive Diborierung von terminalen Alkenen mit chiralem 1 und Bis(pinakolato)dibor (B2pin2) wurde entwickelt. Die anschließende Oxidation des Dibor‐Addukts mit Natriumperoxoborat ergab die entsprechenden optisch aktiven 1,2‐Diole mit hohen Ausbeuten und Enantioselektivitäten.

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