1201628-91-2Relevant academic research and scientific papers
Pyrano[4,3-d]pyrimidinium salts : 22. Reactions of 1,3-dimethyl-2,4- dioxopyrano[4,3-d]pyrimidinium salts with hydrazine
Kostrub,Tsupak,Tkachenko,Shevchenko
, p. 1754 - 1759 (2011/04/23)
Reactions of 5-aryl- and 5,7-diaryl-1,3-dimethyl-2,4-dioxopyrano[4,3-d] pyrimidinium salts with hydrazine were studied. In the former case, the reaction products were the 6-amino-1,3-dimethyl-2,4-dioxopyrido[4,3-d]pyrimidinium salts. 5,7-Diarylpyrano[4,3-d]pyrimidinium salts were transformed into either the corresponding pyridinium salts or 1H-pyrimido-[5,4-d][1,2]diazepine-2,4(3H, 9H)-diones, depending on the hydrazine concentration and the reaction time.
