1241955-79-2

Upstream product

• 1171808-98-2 8-phenyl-3-phenylamino-1,8-dihydro-5H-pyrazolo[3,4-d][1,2,4]triazolo[4,3-a]pyrimidin-5-one 

Relevant academic research and scientific papers

Synthesis of arylamino-substituted pyrazolo[3,4-d][1,2,4]triazolo[4,3-a] pyrimidinones, pyrazolo[4,3-e][1,2,4]triazolo[4,3-a]pyrimidinones, and their thermal isomerization

The reaction of 1-(4-oxo-1-R-5H-pyrazolo[3,4-d]pyrimidin-6-yl)-4- arylthiosemicarbazides with methyl iodide gave rise to 1,2,4-triazolo- pyrazolopyrimidinones of linear structure, and with dicyclohexylcarbodiimide the products had angular and linear structure. The heating of compounds obtained higher than their melting point resulted in their isomerization into 7-aryl-amino-1-R-1,8-dihydro-4H-pyrazolo[3,4-d]-[1,2,4]triazolo[1,5-a] pyrimidin-4-ones.