2-Phenylbenzazete, an azacyclobutadiene
Abstract
2-Phenylbenzazete (2), the first heterocyclic analogue of cyclobutadiene, is formed by vapour phase pyrolysis of 4-phenylbenzo-1,2,3-triazine; it dimerises and reacts with nucleophiles and dienes very rapidly but is surprisingly stable at –80°; 2-phenylnaphty[2,3-b]-azete (12), formed similarly, is even appreciably stable at room temperature.