Thermal conversions of 2-azido-3-piperazino-substituted 1,4-naphthoquinones

Conclusions The 2-azido derivatives which are formed when 2-chloro-3-(4-acylpiperazino)-1,4-naphthoquinones are reacted with NaN₃ in DMF are converted during the reaction to the corresponding 2-amino derivatives and the cyclization products-naphthimidazolediones.2. It is shown that the precursors of the naphthimidazolediones are 1-(3-amino-1,4-naphthoquinonyl-2)-1,4,5,6-tetrahydropyrazines, which are products from dehydrogenation of the piperazine ring.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2822–2826, December, 1988.