| Identification | More | [Name]
3-(1-methylethyl)-pyrazole | [CAS]
49633-25-2 | [Synonyms]
3-(1-methylethyl)-pyrazole
3-Isopropylpyrazole
3-(1-Methylethyl)-1H-pyrazole
3-isopropyl-1H-pyrazole
1H-Pyrazole, 3-(1-methylethyl)- | [Molecular Formula]
C6H10N2 | [MDL Number]
MFCD08701139 | [Molecular Weight]
110.16 | [MOL File]
49633-25-2.mol |
| Chemical Properties | Back Directory | [Boiling point ]
115 °C(Press: 12 Torr) | [density ]
0.991±0.06 g/cm3(Predicted) | [storage temp. ]
Sealed in dry,Room Temperature | [pka]
14.32±0.10(Predicted) | [Appearance]
Colorless to light yellow Liquid | [InChI]
InChI=1S/C6H10N2/c1-5(2)6-3-4-7-8-6/h3-5H,1-2H3,(H,7,8) | [InChIKey]
ZICRALLMHKILDG-UHFFFAOYSA-N | [SMILES]
N1C=CC(C(C)C)=N1 | [CAS DataBase Reference]
49633-25-2(CAS DataBase Reference) |
| Hazard Information | Back Directory | [Synthesis]
Step 4: Preparation of 3-isopropyl-1H-pyrazole (88b). 1-(Dimethylamino)-4-methylpent-1-en-3-one (87) (6.6 g, 1 eq.) was slowly added dropwise to a stirred mixed solution of hydrazine monochloride (3.2 g, 1 eq.), sulfuric acid (1.13 mL) and water (6 mL). The reaction mixture was stirred at 68 °C for 2 hours. Upon completion of the reaction, the reaction mixture was neutralized with 1N NaOH solution and subsequently extracted with ether. The organic layers were combined, dried with anhydrous Na2SO4, filtered and concentrated under reduced pressure to afford the target product 3-isopropyl-1H-pyrazole (88b) as a beige solid in 94% yield.1H NMR (DMSO-d6, 400 MHz) δ: 1.17 (s, 3H), 1.19 (s, 3H), 2.87-2.93 (m, 1H), 5.99 ( s, 1H), 7.40 (s, 1H), 1.39-1.43 (t, J = 7.04 Hz, 3H), 4.08-4.13 (q, J = 7.04 Hz, 2H), 5.86 (d, J = 12.40 Hz, 1H), 7.90 (d, J = 12.40 Hz, 1H). | [References]
[1] Patent: WO2009/14730, 2009, A1. Location in patent: Page/Page column 132
[2] Patent: US2004/63744, 2004, A1. Location in patent: Page/Page column 89
[3] Patent: WO2011/17389, 2011, A1. Location in patent: Page/Page column 152 |
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