53106-30-2

Upstream product

• 81933-80-4 1-phenyl-3-methylpyrazolo<3,4-b>pyridin-6(7H)-one-5-carboxylic acid 
• 81933-75-7 1-phenyl-3-methyl-6-chloropyrazolo<3,4-b>pyridine-5-carbaldehyde 
• 81933-81-5 1-phenyl-3-methylpyrazolo<3,4-b>pyridin-6(7H)-one-5-carbaldehyde 
• 81933-79-1 ethyl 1-phenyl-3-methylpyrazolo<3,4-b>pyridin-6(7H)-one-5-carboxylate 
• 52217-38-6 1-phenyl-3-methylpyrazolo<3,4-b>pyridin-6(7H)-one-5-carbonitrile 
• 52217-35-3 5-amino-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde 

Relevant academic research and scientific papers

AMINOPYRAZOLES, II; SYNTHESIS OF PYRAZOLOPYRIDINES VIA VILSMEIER-HAACK REACTION OF 5-ACETAMINOPYRAZOLES

The title compounds 4 and 5 were isolated as by-product in the Vilsmeier-Haack reaction of 5-acetylaminopyrazoles 1.The structures were supported spectroscopically and proved by a preparative route.On the basis of preliminary investigation of the mechanis