Pyridine → (S)-methyl 3-(sec-butylamino)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate

HRID 1403438Notes

Reaction equation

[C@@H:1]([NH:5][C:6]1[C:7](=[O:20])[NH:8][C:9]2[C:14]([N:15]=1)=[CH:13][C:12]([C:16]([O:18][CH3:19])=[O:17])=[CH:11][CH:10]=2)([CH2:3][CH3:4])[CH3:2].N1C=CC=CC=1.[O:27](S(C(F)(F)F)(=O)=O)[S:28]([C:31]([F:34])([F:33])[F:32])(=O)=[O:29]>ClCCl>[C@@H:1]([NH:5][C:6]1[C:7]([O:20][S:28]([C:31]([F:34])([F:33])[F:32])(=[O:29])=[O:27])=[N:8][C:9]2[C:14]([N:15]=1)=[CH:13][C:12]([C:16]([O:18][CH3:19])=[O:17])=[CH:11][CH:10]=2)([CH2:3][CH3:4])[CH3:2]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of (S)-methyl 3-(sec-butylamino)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (300 mg, 1.10 mmol) in dichloromethane (40 mL) was added pyridine (344 mg, 4.36 mmol). Tf2O (615 mg, 2.18 mmol) was added drop-wise with stirring at 0° C. The resulting solution was stirred for 2 h at room temperature and then washed with water (3×50 mL), dried over anhydrous sodium sulfate and concentrated in vacuo to afford (S)-methyl 3-(sec-butylamino)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate as red oil (390 mg, crude).

Workup

stirringThe resulting solution was stirred for 2 h at room temperature
washwashed with water (3×50 mL)
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-12668a9635884d00bb61d1c592596417
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912188B2

Reaction notes

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