Pyridine → Methyl 3-(azepan-1-yl)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate

HRID 1403392Notes

Reaction equation

[N:1]1([C:8]2[C:9](=[O:22])[NH:10][C:11]3[C:16]([N:17]=2)=[CH:15][C:14]([C:18]([O:20][CH3:21])=[O:19])=[CH:13][CH:12]=3)[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.N1C=CC=CC=1.[O:29](S(C(F)(F)F)(=O)=O)[S:30]([C:33]([F:36])([F:35])[F:34])(=O)=[O:31]>ClCCl>[N:1]1([C:8]2[C:9]([O:22][S:30]([C:33]([F:36])([F:35])[F:34])(=[O:31])=[O:29])=[N:10][C:11]3[C:16]([N:17]=2)=[CH:15][C:14]([C:18]([O:20][CH3:21])=[O:19])=[CH:13][CH:12]=3)[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of methyl 3-(azepan-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (100 mg, 0.33 mmol) in dichloromethane (30 mL) was added pyridine (104 mg, 1.31 mmol) and then Tf2O (186 mg, 0.66 mmol) was added dropwise with stirring at 0° C. The resulting solution was stirred overnight at room temperature and then quenched by the addition of ice-water (20 mL), extracted with dichloromethane (3×10 mL), dried over anhydrous sodium sulfate and concentrated under vacuum to afford methyl 3-(azepan-1-yl)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate as red oil (200 mg, crude).

Workup

stirringThe resulting solution was stirred overnight at room temperature
customquenched by the addition of ice-water (20 mL)
extractionextracted with dichloromethane (3×10 mL)
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated under vacuum

Sources & evidence

ORD record: ord-69eeb2e00a74489199cedf3dab507333
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912188B2

Reaction notes

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