246855-20-9

Upstream product

• 246855-13-0 N-(6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl)-N'-(4-methoxy-benzylidene)-hydrazine 
• 224577-56-4 4-{N'-[1-(4-Methoxy-phenyl)-meth-(E)-ylidene]-hydrazino}-1,7-dihydro-pyrazolo[3,4-d]pyrimidin-6-one 
• 246855-07-2 6-Chloro-4-hydrazino-1H-pyrazolo[3,4-d]pyrimidine 
• 224577-48-4 4-Hydrazino-1H-pyrazolo[3,4-d]pyrimidin-6(7H)-one 
• 50270-27-4 2,4,6-trichloropyrimidine-5-carbaldehyde 
• 123-11-5 4-methoxy-benzaldehyde 
• 5334-33-8 4,5-Dihydro-4-thioxo-1H-pyrazolo[3,4-d]pyrimidin-6(7H)-one 
• 2465-59-0 oxypurinol 
• 241161-65-9 3-(4-methoxy-phenyl)-6,7-dihydro-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidin-5-one 

Relevant academic research and scientific papers

Facile and general syntheses of 3- and/or 5-substituted 7H-pyrazolo[4,3-e]-1,2,4-triazolo[4,3-c]pyrimidines as a new class of potential xanthine oxidase inhibitors

Convenient syntheses of 3- and/or 5-substituted 7H-pyrazolo[4,3-e]-1,2,4-triazolo[4,3-c]pyrimidines as a new class of potent xanthine oxidase inhibitors, involving the oxidative cyclisation of 4-alkylidenehydrazino- or 4-arylmethylidenehydrazino-1H-pyrazolo[3,4-d]pyrimidines with 70% nitric acid as the key step, are described.