130839-62-2

Basic information

• Product Name: [4-(4-nitro-phenylhydrazono)-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-acetic acid ethyl ester
• CAS NO: 130839-62-2
• Molecular Weight: 395.374
• Mol File: 130839-62-2.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [4-(4-nitro-phenylhydrazono)-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-acetic acid ethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: [4-(4-nitro-phenylhydrazono)-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-acetic acid ethyl ester(130839-62-2)
• EPA Substance Registry System: [4-(4-nitro-phenylhydrazono)-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-acetic acid ethyl ester(130839-62-2)

Safety Data

• Hazardous Substances Data: 130839-62-2(Hazardous Substances Data)

Upstream product

• 29211-44-7 ethyl 2-(4,5-dihydro-5-oxo-1-phenyl-1H-pyrazol-3-yl)ethanoate 
• 100-01-6 4-nitro-aniline 
• 148516-30-7 2-(4-nitro-phenylhydrazono)-3-oxo-glutaric acid diethyl ester 
• 100-63-0 phenylhydrazine 
• 100-05-0 4-nitrobenzenediazonium chloride 

Relevant articles and documents

A Novel Electro-organic Synthesis of Pyrrolopyrazole Derivatives

The polarographic reduction of two series of pyrazolone derivatives, namely ethyl 4-arylazo-5-oxo-4,5-dihydropyrazol-3-ylacetate derivatives (1a-d) and ethyl 4-arylazo-5-oxo-1-phenyl-4,5-dihydropyrazol-3-ylacetate derivatives (2a-d), is reported in detail for aqueous buffered media at a dropping mercury electrode (DME).Controlled-potential electrolysis (CPE) on four members showed that the products of electrolysis were ethyl 4-amino-5-oxo-4,5-dihydropyrazol-3-ylacetate (5a), 3,5-dioxo-2,3,3a,4,5,6-hexahydropyrrolopyrazole (6a), ethyl 4-amino-5-oxo-1-phenyl-4,5-dihydropyrazol-3-ylacetate (5b), and 3,5-dioxo-2-phenyl-2,3,3a,4,5,6-hexahydropyrrolo-pyrazole (6b).These were isolated and identified through IR, 1H NMR, and MS analyses.Also, the acid dissociation constants pKa1 and pKa2 were determined spectrophotometrically and a mechanism has been suggested and discussed for the electrode and ionization processes.Finally the results were shown to be predicted through Hammett correlations.