108599-16-2

Upstream product

• 4173-74-4 1-Phenyl-3-methyl-4-acetyl-5-pyrazolon 
• 100-63-0 phenylhydrazine 
• 128256-50-8 3-methyl-1-phenyl-4-acetyl-2-pyrazoline-5-thione 
• 1140-37-0 Acetyl-4 chloro-5 methyl-3 phenyl-1 pyrazole 
• 133636-22-3 5-Methyl-2-phenyl-4-[1-(phenyl-hydrazono)-ethyl]-2,4-dihydro-pyrazole-3-thione 
• 133636-20-1 5-Methyl-2-phenyl-4-[1-(phenyl-hydrazono)-ethyl]-2,4-dihydro-pyrazol-3-one 

Downstream Products

• 133636-26-7 3-(α-hydroxymethylene-α-formylmethyl)-4-methyl-1,6-diphenylpyrazolo<3,4-c>pyrazole 
• 133636-39-2 3-Isoxazol-4-yl-4-methyl-1,6-diphenyl-1,6-dihydro-pyrazolo[3,4-c]pyrazole 
• 133636-37-0 3-Methyl-1,6-diphenyl-4-(1H-pyrazol-4-yl)-1,6-dihydro-pyrazolo[3,4-c]pyrazole 
• 133636-31-4 (Z)-2-(4-Methyl-1,6-diphenyl-1,6-dihydro-pyrazolo[3,4-c]pyrazol-3-yl)-3-piperidin-1-yl-propenal 
• 133636-32-5 (Z)-2-(4-Methyl-1,6-diphenyl-1,6-dihydro-pyrazolo[3,4-c]pyrazol-3-yl)-3-morpholin-4-yl-propenal 
• 133636-33-6 (Z)-2-(4-Methyl-1,6-diphenyl-1,6-dihydro-pyrazolo[3,4-c]pyrazol-3-yl)-3-piperazin-1-yl-propenal 
• 68347-71-7 3,4-dimethyl-1,6-diphenylpyrazolo<3,4-c>pyrazole 

Relevant academic research and scientific papers

Studies in the Vilsmeier-Haack Reaction, Part VII: Synthesis and Reaction of 3-Methyl-1-phenyl-4-acetyl Hydrazono 2-Pyrazoline-5-one(-5-thione)

The keto (thio) tautomers 1-4 of the hydrazono pyrazolone, thiopyrazolone derivatives underwent simultaneous diformylation, chlorination (desulphurization) and ring closure under Vilsmeier reaction conditions giving the pyrazolopyrazole aminoacrole

Action des hydrazines sur les acetyl-4 chloro-5(ou 3) methyl-3(ou 5) pyrazoles: formation d'une pyrazoloquinoleine, d'hydrazones et de cetazines

The cyclization of 4-acetyl-5(or 3)-chloropyrazole hydrazones into pyrazolopyrazoles does not proceed when the pyrazole is a N-methylated derivative or when the hydrazone is a phenylhydrazone.Instead of 1-azapentalene derivatives, a new pyrazolo3,