Tributyltin radical-induced addition–carbocyclization on chiral perhydro-1,3-benzoxazines: a facile entry to enantiopure tin-containing auxiliaries
Abstract
N-Acryloylperhydro-1,3-benzoxazines 1a,b undergo stereo-selective addition–carbocyclization when reacted with Bu3SnH, leading to stannylated lactamic rings that can be transformed into enantiopure pyrrolidines.