Dimethylformamide → Methyl 2-(4-formyl-3-methyl-pyrazol-1-yl)pyridine-3-carboxylate

HRID 1517569Notes

Reaction equation

[CH3:1][C:2]1[C:6]([CH:7]=[O:8])=[CH:5][NH:4][N:3]=1.C(=O)([O-])[O-].[K+].[K+].F[C:16]1[C:21]([C:22]([O:24][CH3:25])=[O:23])=[CH:20][CH:19]=[CH:18][N:17]=1.CN(C)C=O>O>[CH:7]([C:6]1[C:2]([CH3:1])=[N:3][N:4]([C:16]2[C:21]([C:22]([O:24][CH3:25])=[O:23])=[CH:20][CH:19]=[CH:18][N:17]=2)[CH:5]=1)=[O:8]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 3-methyl-1H-pyrazole-4-carbaldehyde (300 mg, 2.72 mmol), potassium carbonate (565 mg, 4.08 mmol), methyl 2-fluoropyridine-3-carboxylate (507 mg, 3.27 mmol) and dimethylformamide (2 mL) is stirred at 60° C. for 16 h. Water is added and the compound is extracted in ethyl acetate. The organic layer is washed with brine, dried over sodium sulfate and solvent is evaporated. The crude mixture is purified by normal phase Isco chromatography using hexane:ethyl acetate, 2:1 as eluent to yield 422 mg of the title compound. MS (m/z): 246 (M+1).

Workup

extractionthe compound is extracted in ethyl acetate
washThe organic layer is washed with brine
dry with materialdried over sodium sulfate and solvent
customis evaporated
customThe crude mixture is purified by normal phase Isco chromatography

Sources & evidence

ORD record: ord-f549775b1fe94cf1b2f647957482649a
Source dataset: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08232289B2

Reaction notes

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