Formation of 1,2,4-triazinium 1-imides from 4-aryl-1-azido-1,3-bis(dimethylamino)-2-azabutenylium salts: heterocyclic N-imides lacking exocyclic stabilisation
Abstract
Treatment of 4-aryl-1-azido-1,3-bis(dimethylamino)-2-azabutrnylium perchlorates (5) with sodium hydroxide yields stable 6-aryl-3,5-bis(dimethylamino)-1,2,4-triazinium 1-imides (8), in which the exocyclic nitrogen atom bears only hydrogen.