Chemoselective Lactam Formation in the Addition of Benzenesulfonyl Bromide to N-Allyl Acrylamides and N-Allyl 3,3-Dimethylacrylamides
摘要:
Chemoselectivity in the addition and cyclization reactions of PhSO2Br to N-allyl acrylamides has been confirmed due to the higher reactivity of the acrylic C=C bond toward the sulfonyl radical than that of the allyl C=C bond. Formation of gamma-lactams by C-beta-->C-alpha, cyclization can be achieved with N-allyl 3,3-dimethylacrylamides.