1-Methyl-1H-pyrazole-5-carbonitrile synthesis
- Product Name:1-Methyl-1H-pyrazole-5-carbonitrile
- CAS Number:66121-72-0
- Molecular formula:C5H5N3
- Molecular Weight:107.11
98711-43-4
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66121-72-0
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Yield:66121-72-0 90%
Reaction Conditions:
with pyridine;trichlorophosphate at 20; for 3 h;
Steps:
94
Example 94: 2-Methyl-2H-pyrazole-3-carbonitrile; NC^(N-N2-Methyl-2H-pyrazole-3-carboxylic acid amide (2.3 g, 18 mmol. 1.0 equiv) was dissolved in pyridine (36 mL) and treated with POCI3 (2.5 mL, 26 mmol, 1.4 equiv). The resultant amber solution was stirred for 3 hours at room temperature. The reaction mixture was diluted with ice and the aqueous layer, which was adjusted to pH 3 with 6M HCI, was extracted with MTBE. The MTBE extract was washed with water, brine, dried over magnesium sulfate, filtered, concentrated in vacuo and gave the product as a clear oil (1.8 g, 90% yield): 1H NMR (400 MHz, DMSO-d6) δ 7.68 (d, J = 2.0Hz, 1H), 7.13 (d, J = 2.0Hz, 1 H), 4.00 (s, 3H).
References:
WO2006/43145,2006,A1 Location in patent:Page/Page column 120
27258-33-9
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66121-72-0
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$22.00/100mg
17827-60-0
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66121-72-0
41 suppliers
$22.00/100mg