| Identification | More | [Name]
1-METHYL-3-PROPYLPYRAZOLE-5-CARBOXYLIC ACID | [CAS]
139755-99-0 | [Synonyms]
TIMTEC-BB SBB010494
CHEMBRDG-BB 4402460
Sildenafil Impurity 57
ASINEX-REAG BAS 02107705
Methisosildenafil Impurity 14
2-methyl-5-propyl-3-pyrazolecarboxylate
1-METHYL-3-PROPYLPYRAZOLE-5-CARBOXYLIC ACID
1-METHYL-3-PROPYL-5-PYRAZOLE CARBOXYLIC ACID
2-METHYL-5-PROPYL-2H-PYRAZOLE-3-CARBOXYLIC ACID
1-METHYL-3-PROPYL-1H-PYRAZOLE-5-CARBOXYLIC ACID
1-Methyl-3-propylpyrazole-5-carboxylic acid ,98%
1H-Pyrazole-5-carboxylic acid, 1-methyl-3-propyl-
2-Methyl-5-propyl-2H-pyrazole-3-carboxboxylic acid
1H-Pyrazole-5-carboxylicacid,1-methyl-3-propyl-(9CI)
1-methyl-3-propyl-1H-pyrazole-5-carboxylic acid(SALTDATA: FREE) | [Molecular Formula]
C8H12N2O2 | [MDL Number]
MFCD02169703 | [Molecular Weight]
168.19 | [MOL File]
139755-99-0.mol |
| Chemical Properties | Back Directory | [Melting point ]
150-154 °C | [Boiling point ]
330.3±30.0 °C(Predicted) | [density ]
1.19±0.1 g/cm3(Predicted) | [storage temp. ]
Sealed in dry,Room Temperature | [solubility ]
Chloroform (Sightly), Methanol (Slightly) | [form ]
Solid | [pka]
3.10±0.25(Predicted) | [color ]
Off-White to Pale Beige | [Detection Methods]
HPLC,NMR | [CAS DataBase Reference]
139755-99-0(CAS DataBase Reference) |
| Hazard Information | Back Directory | [Chemical Properties]
White solid | [Uses]
Intermediate in the production of Sildenafil and respective analogs. | [Synthesis]
Preparation of Intermediate I-04a: Ethyl 1-methyl-3-n-propyl-pyrazole-5-carboxylate (11 g, 56.12 mmol) was dissolved in 6 M hydrochloric acid solution (121 mL) and heated to 100°C for overnight reaction. Upon completion of the reaction, the mixture was concentrated under vacuum and subsequently extracted with ethyl acetate (EA) and the organic layer was washed with water. Finally, the organic layer was concentrated in vacuum to afford the target product 1-methyl-3-propyl-1H-pyrazole-5-carboxylic acid (I-04a) (9.4 g, 98% yield).ESI-MS (M + 1): 169; calculated value C8H12N2O2: 168.1. | [References]
[1] Patent: WO2014/131855, 2014, A1. Location in patent: Page/Page column 80
[2] Patent: WO2016/20307, 2016, A1. Location in patent: Page/Page column 50
[3] Patent: US2008/194529, 2008, A1. Location in patent: Page/Page column 56-57
[4] Patent: WO2015/114647, 2015, A1. Location in patent: Page/Page column 46; 47
[5] Patent: US5250534, 1993, A |
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