2-Fluoro-4-nitrophenol → 7-(2-Fluoro-4-nitrophenoxy)-2-(thiazol-2-yl)thieno[3,2-b]pyridine

HRID 500753Notes

Reaction equation

Cl[C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[CH:8]=[C:9]([C:11]3[S:12][CH:13]=[CH:14][N:15]=3)[S:10][C:3]=12.[F:16][C:17]1[CH:22]=[C:21]([N+:23]([O-:25])=[O:24])[CH:20]=[CH:19][C:18]=1[OH:26].C(=O)([O-])[O-].[K+].[K+]>O(C1C=CC=CC=1)C1C=CC=CC=1.CCOC(C)=O>[F:16][C:17]1[CH:22]=[C:21]([N+:23]([O-:25])=[O:24])[CH:20]=[CH:19][C:18]=1[O:26][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[CH:8]=[C:9]([C:11]3[S:12][CH:13]=[CH:14][N:15]=3)[S:10][C:3]=12

Participants

Conditions

Temperature: 180 °C

Procedure

To a suspension of 10 (194 mg, 0.77 mmol) in Ph2O (10 mL) was added 2-fluoro-4-nitrophenol (240 mg, 1.53 mmol) and potassium carbonate (425 mg, 3.08 mmol) and the reaction mixture was heated at 180° C. for 4 hrs. The reaction mixture was cooled to room temperature and diluted with EtOAc. The resultant solution was washed with water and the organic layer was collected, dried over anhydrous sodium sulfate and filtered. The solvents were removed under reduced pressure; the residue was dissolved in DCM, and purified by column chromatography (eluent EtOAc-hexane 4:1) to afford 11 (190 mg, 66% yield) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) ppm: 8.61 (d, J=5.5 Hz, 1H), 8.46 (dd, J=2.74 and 10.37 Hz), 8.24 (s, 1H), 8.20-8.10 (m, 1H), 7.95 (s, 2H), 7.73 (t, J=8 Hz, 1H), 6.98 (d, J=5.3 Hz, 1H).

Workup

temperatureThe reaction mixture was cooled to room temperature
washThe resultant solution was washed with water
customthe organic layer was collected
dry with materialdried over anhydrous sodium sulfate
filtrationfiltered
customThe solvents were removed under reduced pressure
dissolutionthe residue was dissolved in DCM
custompurified by column chromatography (eluent EtOAc-hexane 4:1)

Sources & evidence

ORD record: ord-2a86b4a21efb47189810634e03edff61
Source dataset: uspto-grants-2010_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07772247B2

Reaction notes

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