Copper-catalyzed enantioselective substitution of allylic carbonates with diboron:: An efficient route to optically active α-chiral allylboronates

A method for the synthesis of alpha-chiral allylboronates featuring the Cu(I)-catalyzed enantioselective substitution of readily available allylic carbonates with a diboron is described. Using this method, various alpha-chiral allylboronates, including functionalized allylboronates, were successfully synthesized, with high enantiomeric purity.