Water → N-[6-(2-fluoro-4-nitrophenoxy)-1,3-benzothiazol-2-yl]cyclopropanecarboxamide

HRID 2095769Notes

Reaction equation

[OH:1][C:2]1[CH:16]=[CH:15][C:5]2[N:6]=[C:7]([NH:9][C:10]([CH:12]3[CH2:14][CH2:13]3)=[O:11])[S:8][C:4]=2[CH:3]=1.F[C:18]1[CH:23]=[CH:22][C:21]([N+:24]([O-:26])=[O:25])=[CH:20][C:19]=1[F:27].C(=O)([O-])[O-].[Cs+].[Cs+].O>CS(C)=O>[F:27][C:19]1[CH:20]=[C:21]([N+:24]([O-:26])=[O:25])[CH:22]=[CH:23][C:18]=1[O:1][C:2]1[CH:16]=[CH:15][C:5]2[N:6]=[C:7]([NH:9][C:10]([CH:12]3[CH2:13][CH2:14]3)=[O:11])[S:8][C:4]=2[CH:3]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A suspension of N-(6-hydroxy-1,3-benzothiazol-2-yl)cyclopropanecarboxamide (1.17 g, 5.00 mmol), 1,2-difluoro-4-nitrobenzene (0.96 g, 6.00 mmol) and cesium carbonate (3.26 g, 10.0 mmol) in dimethyl sulfoxide (10 mL) was stirred at 50° C. for 5 hr. After cooling to room temperature, water was added to the reaction mixture, and the mixture was extracted 3 times with ethyl acetate/tetrahydrofuran. The organic layer was washed with water, dried over anhydrous sodium sulfate and filtered. The solvent was evaporated under reduced pressure, and the residue was washed with ethyl acetate and collected by filtration to give the title compound (1.22 g, 65%) as a pale-yellow solid.

Workup

temperatureAfter cooling to room temperature
extractionthe mixture was extracted 3 times with ethyl acetate/tetrahydrofuran
washThe organic layer was washed with water
dry with materialdried over anhydrous sodium sulfate
filtrationfiltered
customThe solvent was evaporated under reduced pressure
washthe residue was washed with ethyl acetate
filtrationcollected by filtration

Sources & evidence

ORD record: ord-7b69cda19e7343b3a69f07c8f4d67355
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08445509B2

Reaction notes

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