75526-82-8

Basic information

• Product Name: anhydro-1-hydroxy-3-oxo-2-phenylpyrazolo<1,2-a>pyrazolium hydroxide
• Synonyms: anhydro-1-hydroxy-3-oxo-2-phenylpyrazolo<1,2-a>pyrazolium hydroxide
• CAS NO: 75526-82-8
• Molecular Weight: 212.208
• Mol File: 75526-82-8.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: anhydro-1-hydroxy-3-oxo-2-phenylpyrazolo<1,2-a>pyrazolium hydroxide(CAS DataBase Reference)
• NIST Chemistry Reference: anhydro-1-hydroxy-3-oxo-2-phenylpyrazolo<1,2-a>pyrazolium hydroxide(75526-82-8)
• EPA Substance Registry System: anhydro-1-hydroxy-3-oxo-2-phenylpyrazolo<1,2-a>pyrazolium hydroxide(75526-82-8)

Safety Data

• Hazardous Substances Data: 75526-82-8(Hazardous Substances Data)

Upstream product

• 83-13-6 diethyl 2-phenylmalonate 
• 17118-70-6 (chlorocarbonyl)phenyl ketene 
• 18156-75-7 1-trimethylsilylpyrazole 
• 106367-54-8 3,5-dihydroxy-4-phenylpyrazole 
• 102-52-3 malonaldehydebis(dimethylacetal) 
• 288-13-1 NH-pyrazole 
• 37818-48-7 2-Phenyl-propanedioyl dichloride 

Downstream Products

• 542-78-9 Malondialdehyde 
• 106367-54-8 3,5-dihydroxy-4-phenylpyrazole 
• 114492-32-9 anhydro-2-(2-nitrophenyl)-1-hydroxy-3-oxopyrazolo<1,2-a>pyrazolium hydroxide 
• 114492-29-4 anhydro-2-(4-bromophenyl)-1-hydroxy-3-oxopyrazolo<1,2-a>pyrazolium hydroxide 
• 79815-71-7 α-phenylmalonmorpholide 
• 288-13-1 NH-pyrazole 

Relevant articles and documents

A Facile Synthesis of 1-Oxo-1H-pyrazolopyrazol-4-ium-3-olates

The thermal condensation at 200-300 deg C of pyrazoles 1a-c with substituted diethyl malonates 2a-c or triethyl methanetricarboxylate 2d yields the 1-oxo-1H-pyrazolo-pyrazol-4-ium-3-olates 3a-h.

Cross-Conjugated and Psaeudo-Cross-Conjugated Mesomeric Betaines. 1. Synthesis and Characterization

Reaction of pyrazoles, 1,2,3-triazoles, and 1,2,4-triazoles with aryl(chlorocarbonyl)ketenes, alkylmalonyl dichlorides, or carbon suboxide results in a series of cross-conjugated mesomeric betaines, characterized by the presence of distinct cationic and anionic segments. 1-Substituted imidazoles, suitably substituted 1,2,4-triazoles, and pyridine with the above reagents give rise to pseudo-cross-conjugated mesomeric betaines which, in addition to charge separation, are characterized by the presence of the 2-oxyallyl cation 1,3-dipole.Alternative syntheses of cross-conjugated mesomeric betaines which allow the introduction of more diverse substituents are also described.

Reactions of (Chlorocarbonyl)phenylketene. Formation of a New Class of Heterocyclic Zwitterion

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