Carbene Reactions of α-Oxacyclo- and α-Azacyclo-N-aziridinylimines: Effect of Heteroatom and Ring Size in the Ring Expansion Reaction
作者:Sunggak Kim、Joo-Yong Yoon
DOI:10.1055/s-2000-7598
日期:——
Carbenes, generated from thermolysis of α-oxacyclo- and α-azacyclo-N-aziridinylimines in refluxing toluene, underwent ring expansions via insertion of alkyl carbenes into carbon-carbon bonds and intramolecular ammonium ylide formations, respectively. Ring expansion reaction of α-oxetanyl-N-aziridinylimines occurred via alkylidenecarbene intermediates, whereas thermal reaction of α-azetidinyl-N-aziridinylimines afforded α-aminoacetylene compounds via 1,2-H migration of alkylidenecarbene intermediates.