Potassium Carbonate → HCID 89740139, compound

HRID 1526937Notes

Reaction equation

[CH3:1][C:2]1[C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][NH:4][N:3]=1.Br[CH:12]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[CH3:13].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[CH3:1][C:2]1[C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][N:4]([CH:12]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH3:13])[N:3]=1.[CH3:1][C:2]1[N:3]([CH:12]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH3:13])[N:4]=[CH:5][C:6]=1[C:7]([O:9][CH3:10])=[O:8]

Participants

Conditions

Temperature: 20 °C

Procedure

To a solution of methyl 3-methyl-1H-pyrazole-4-carboxylate (280 mg, 2 mmol) in N, N-dimethylformamide (30 mL) was added (1-bromoethyl)benzene (0.37 g, 2 mmol) and potassium carbonate (0.55 g, 4 mmol). The mixture was stirred at 20° C. and stirred for 12 hours. The solvent was evaporated in vacuo and the residue was purified by CXTH (Column: Dsisol, 10 μM, C18, 250 mm*50 mm; Mobile: acetonitrile (0.1% formic acid)-water (0.1% formic acid), acetonitrile from 30% to 70% in 80 minutes; oven: 20° C.; flow rate: 50 ml/minute, wavelength: 214 nm) to give methyl 3-methyl-1-(1-phenylethyl)-1H-pyrazole-4-carboxylate (90 mg, 19%) and methyl 5-methyl-1-(1-phenylethyl)-1H-pyrazole-4-carboxylate (80 mg, 16%). The product was used directly in the following reaction. LRMS (M+H+) m/z: calcd 244.12. found 244.

Workup

stirringstirred for 12 hours
customThe solvent was evaporated in vacuo
customthe residue was purified by CXTH (Column: Dsisol, 10 μM, C18, 250 mm*50 mm; Mobile: acetonitrile (0.1% formic acid)-water (0.1% formic acid), acetonitrile from 30% to 70% in 80 minutes; oven: 20° C.; flow rate: 50 ml/minute, wavelength: 214 nm)

Sources & evidence

ORD record: ord-cf6634cf845547d4b9aa38021f720229
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09085583B2

Reaction notes

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