Abstract Condensation of 2-methyl-4-oxo-1, 3-benzoxazinium perchlorate with various aromatic and heterocyclic aldehydes provided previously unknown arylvinyl-and hetarylvinyl- substituted salts whose recyclization under treatment with guanidine resulted in formerly undescribed 1, 3, 5-triazines. The reaction of perchlorates obtained with guanidinebenzoxazole led to the formation of bishetarylamines, with ...