74169-56-5

Upstream product

• 141-97-9 ethyl acetoacetate 
• 100-16-3 4-nitrophenylhydrazone 
• 6402-09-1 1-(4'-nitrophenyl)-3-methyl-5-pyrazolone 
• 96138-44-2 3-[3-Methyl-1-(4-nitro-phenyl)-5-oxo-1,5-dihydro-pyrazol-(4Z)-ylidene]-butyric acid ethyl ester 
• 626-34-6 ethyl aminocrotonate 

Downstream Products

• 74169-63-4 5-Bromo-3,4-dimethyl-1-(4-nitro-phenyl)-1H-pyrano[2,3-c]pyrazol-6-one 
• 85094-24-2 3,4-Dimethyl-5-nitro-1-(4-nitro-phenyl)-1H-pyrano[2,3-c]pyrazol-6-one 
• 1410076-41-3 1-(4-aminophenyl)-3,4-dimethylpyrano[2,3-C]pyrazol-6(1H)-one 
• 1410076-43-5 (Z)-3,4-dimethyl-1-(4-((4-nitrobenzylidene)amino)phenyl)pyrano[2,3-c]pyrazol-6(1H)-one 

Relevant academic research and scientific papers

ETUDE DE LA REACTIVITE DU 3-AMINO-2-BUTENOATE D'ETHYLE VIS-A-VIS D'AZOLINE-5-ONES.

Various 1,3-disubstituted pyrazolin-5-ones, 3-phenylisoxazolin-5-one and 2-phenyloxazolin-5-one react with ethyl 3-amino-2-butenoate to yield compounds resulting from the elimination of ammonia between the precursors; subsequent intramolecular cyclization

Pyranopyrazoles. II (1). Synthesis and Reactions of 1H,6H-Pyranopyrazol-6-ones

Various 1H,6H-pyranopyrazol-6-ones (III-XXIII) were obtained from β-keto esters and 1H-pyrazol-5-ones or hydrazines.Nitrations, chlorinations and brominations of these pyranopyrazoles were also carried out giving the corresponding derivatives (XXIV-LXIV).The pyrone ring is the more reactive one by the addition-elimination route.