Regiocontrolled synthesis of enantioenriched 2-substituted dehydropiperidines by stereospecific allyl–allyl cross-coupling of a chiral allylic boronate

Regiocontrolled cross-coupling of an optically enriched dehydropiperidinyl boronate with cinnamyl carbonates affords 2-allylated 3,4-dehydropiperidines exclusively with enantiospecificity up to 99%.