| Identification | More | [Name]
1-Methyl-1H-pyrazol-5-ylamine | [CAS]
1192-21-8 | [Synonyms]
1-METHYL-1H-PYRAZOL-5-AMINE
1-METHYL-1H-PYRAZOL-5-YLAMINE
1-METHYL-5-AMINOPYRAZOLE
2-METHYL-2 H-PYRAZOL-3-YLAMINE
2-METHYLPYRAZOL-3-AMINE
5-AMINO-1-METHYL-1H-PYRAZOLE
5-AMINO-1-METHYLPYRAZOLE
AKOS B024266
AKOS PAO-0256
ART-CHEM-BB B024266
BUTTPARK 18\09-58
5-Amino-1-methylpyrazole 97%
1-Methyl-1H-pyrazol-5-ylamine ,97%
1-Methyl-5-amino-1H-pyrazole | [EINECS(EC#)]
688-112-1 | [Molecular Formula]
C4H7N3 | [MDL Number]
MFCD00068156 | [Molecular Weight]
97.12 | [MOL File]
1192-21-8.mol |
| Chemical Properties | Back Directory | [Appearance]
white to light yellow crystal powde | [Melting point ]
73 °C | [Boiling point ]
95-96°C (0.5 mmHg) | [density ]
1.22±0.1 g/cm3(Predicted) | [storage temp. ]
Keep in dark place,Sealed in dry,2-8°C | [solubility ]
Chloroform (Slightly), DMSO (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) | [form ]
Solid | [pka]
4.16±0.10(Predicted) | [color ]
Dark Red to Orange to Brown | [Usage]
An interesting synthetic intermediate | [Detection Methods]
GC | [InChI]
InChI=1S/C4H7N3/c1-7-4(5)2-3-6-7/h2-3H,5H2,1H3 | [InChIKey]
JESRNIJXVIFVOV-UHFFFAOYSA-N | [SMILES]
N1(C)C(N)=CC=N1 | [CAS DataBase Reference]
1192-21-8(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi | [Risk Statements ]
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
2811 | [Hazard Note ]
Irritant | [HazardClass ]
IRRITANT | [HS Code ]
29331990 |
| Hazard Information | Back Directory | [Chemical Properties]
white to light yellow crystal powde | [Uses]
An interesting synthetic intermediate | [Synthesis]
General procedure for the synthesis of 1-methyl-5-aminopyrazole (9) from 3-methoxyacrylonitrile (1a) and methylhydrazine (2b): methylhydrazine (2b) (0.25 mL, 4.7 mmol) and 3-methoxyacrylonitrile (1a) (0.20 mL, 2.4 mmol) were dissolved in toluene/acetic acid (4:1 v/v; 5 mL) solvent mixture. The reaction mixture was placed in a sealed pressure rated Pyrex tube (10 mL) and microwave irradiated for 1 h at 120 °C using a CEM Discover microwave synthesizer set at an initial power of 100 W. The reaction was carried out using a CEM Discover microwave synthesizer. After completion of the reaction, the reaction mixture was cooled in a stream of compressed air. Subsequently, the reaction mixture was neutralized with saturated aqueous NaHCO3 solution and extracted with EtOAc (3 × 20 mL). The organic layers were combined, washed sequentially with water and brine, dried over MgSO4, and the solvent was evaporated in vacuum to afford 1-methyl-5-aminopyrazole (0.22 g, 97%) as a light brown solid with a melting point of 71-73 °C (literature value: 71-72 °C). The product was confirmed by high-resolution mass spectrometry (measured value: 97.0640, C4H7N3 [M] theoretical value: 97.0637).1H NMR (400 MHz; DMSO-d6) δ 7.60 (1H, d, J = 2.0 Hz, H-3), 5.15 (1H, d, J = 2.0 Hz, H-4), 3.85 (2H, br s, with D2O exchange, NH2), 3.50 (3H, s, Me); 13C NMR (126 MHz; DMSO-d6) δ 145.6 (C), 138.5 (CH), 90.8 (CH), 34.0 (Me); LRMS (APcI) m/z (relative intensity) 97 (M+, 100). | [References]
[1] Tetrahedron, 2013, vol. 69, # 39, p. 8429 - 8438 |
|
|