Water → 1-[4-(2-Azidoethyl)phenyl]-3,5-dimethyl-4-phenyl-1H-pyrazole

HRID 891079Notes

Reaction equation

Cl[CH2:2][CH2:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[C:14]([CH3:15])=[C:13]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[C:12]([CH3:22])=[N:11]2)=[CH:6][CH:5]=1.[N-:23]=[N+:24]=[N-:25].[Na+].O>CN(C)C=O>[N:23]([CH2:2][CH2:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[C:14]([CH3:15])=[C:13]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[C:12]([CH3:22])=[N:11]2)=[CH:6][CH:5]=1)=[N+:24]=[N-:25]

Participants

Conditions

Temperature: 100 °C

Procedure

To a stirred solution of 1-[4-(2-chloroethyl)phenyl]-3,5-dimethyl-4-phenyl-1H-pyrazole (step 1, 0.34 mmol) and KI (56 mg, 0.34 mmol) in N,N-dimethylformamide (2.7 mL) was added sodium azide (44 mg, 0.68 mmol), and then the resulting mixture was stirred for 6 h at 100° C. The reaction mixture was poured into water (100 mL), and extracted with ethyl acetate/toluene (4:1). The organic layer was washed with water (50 mL) and brine (50 mL), then dried (Na2SO4). After removal of the solvent, the crude product was purified by TLC with hexane/ethyl acetate (1:1) to afford 87 mg (81%) of the title compound as yellow oil: 1H-NMR (CDCl3) δ 7.46-7.29 (9H, m), 3.55 (2H, t, J=7.3 Hz), 2.96 (2H, t, J=7.1 Hz), 2.34 (3H, s), 2.30 (3H, s).

Workup

extractionextracted with ethyl acetate/toluene (4:1)
washThe organic layer was washed with water (50 mL) and brine (50 mL)
dry with materialdried (Na2SO4)
customAfter removal of the solvent
customthe crude product was purified by TLC with hexane/ethyl acetate (1:1)

Sources & evidence

ORD record: ord-90fc3c277fba4d1b900563fedb3cf2bf
Source dataset: uspto-grants-2006_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07001917B2

Reaction notes

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