An easy route to dibenz[c,e]azepines via nitrile ylide cyclisation: the electrocyclic equivalent of a Bischler–Napieralski reaction
Abstract
N-(2-Arylbenzyl)benzimidoyl chlorides (9) are converted into dibenz[c,e]azepines (6) by treatment with potassium t-butoxide, via cyclisation of nitrile ylides (4).