Electrophilic olefin heterocyclization in organic synthesis. Stereoselective synthesis of 4,5-disubstituted .gamma.-lactams by iodine-induced lactam formation of .gamma.,.delta.-unsaturated thioimidates
Electrophilic olefin heterocyclization in organic synthesis. Stereoselective synthesis of 4,5-disubstituted .gamma.-lactams by iodine-induced lactam formation of .gamma.,.delta.-unsaturated thioimidates
alpha-Iodination reaction of 4-alkenylamide with a beta-chiral center proceeds with high diastereoselectivity to give syn alpha-iodoalkenamide through the formation of cyclic ketene N,O-acetal and subsequent alpha-iodination from the opposite side of a beta-substituent. (C) 1997 Elsevier Science Ltd.
Electrophilic olefin heterocyclization in organic synthesis. Stereoselective synthesis of 4,5-disubstituted .gamma.-lactams by iodine-induced lactam formation of .gamma.,.delta.-unsaturated thioimidates