Rearrangements in the haloalkoxy(thio,amino)-sym-triazine series. 10. Synthesis and rearrangement of 2-dimethylamino-4-(2-acylhydrazino)-6,7-dihydrooxazolo[3,2-a]-sym-triazines

2-Dimethylamino-4-(2-acetylhydrazino)- and 4-(2-benzoyl)hydrazino-6,7-dihydrooxazolo3,2-a]-sym-triazines were synthesized. It was established that when these compounds are heated, they undergo rearrangement to the corresponding 2-dimethylamino-6,7-dihydroimidazo2,1-a]-sym-triazines. Deacylation of the latter gives the N-amino derivative.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, 1689–1692, December, 1981