Detail of "20583-31-7"

CAS Number:
20583-31-7
Name:
1H-Pyrazole,3-(4-nitrophenyl)-
Superlist Name:
3-(4-Nitrophenyl)-1H-pyrazole
Molecular Structure:
Formula:
C₉H₇N₃O₂
Molecular Weight:
189.17
Synonyms:
Pyrazole,3(or 5)-(p-nitrophenyl)- (6CI);Pyrazole, 3-(p-nitrophenyl)- (8CI);3-(4-Nitrophenyl)-1H-pyrazole;
Density:
1.369 g/cm³
Melting Point:
195-197 °C
Boiling Point:
430 °C at 760 mmHg
Flash Point:
213.9 °C
Hazard Symbols:
Xi

Display：

3-(4-Nitrophenyl)Pyrazole

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Synthesis of 3-substituted arylpyrazole-4-carboxylic acids: Lebedev, A. V.; Lebedeva, A. B.; Sheludyakov, V. D.; Kovaleva, E. A.; Ustinova, O. L.; Kozhevnikov, I. B. (State Research Center, State Research Institute of Chemistry and Technology of Organoelement Compounds, Moscow, Russia). Russian Journal of General Chemistry, 75(5), 782-789 (English) 2005 Pleiades Publishing, Inc. CODEN: RJGCEK. ISSN: 1070-3632. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) A series of 3-arylpyrazole-4-carboxylic acids, e.g., I, have been prepd. via Vilsmeier formylation of semicarbazones of substituted acetophenones and 2-acetylthiophene followed by oxidn. of the resulting 3-aryl-substituted pyrazole-4-carboxaldehydes with potassium permanganate. The mechanism of the formylation reaction was discussed.Several substances are used for example 20583-31-7 which is its cas registry number. The method successfully worked even with acetophenones contg. alkyl substituents. In the latter case, an addnl. step involving isolation of pyrazole-4-carboxylic acids as their silyl esters was used. .