Cesium carbonate → 4-(2-(4-(1H-benzo[d]imidazole-2-carbonyl)phenoxy)pyridin-3-yl)cyclohexanone

HRID 555846Notes

Reaction equation

Cl[C:2]1[C:3]([CH:8]2[CH2:13][CH2:12][C:11](=[O:14])[CH2:10][CH2:9]2)=N[CH:5]=[CH:6][N:7]=1.[NH:15]1[C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][C:18]=2[N:17]=[C:16]1[C:24]([C:26]1[CH:31]=[CH:30][C:29]([OH:32])=[CH:28][CH:27]=1)=[O:25].[C:33](=O)([O-])[O-].[Cs+].[Cs+]>CN1C(=O)CCC1.O>[NH:15]1[C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][C:18]=2[N:17]=[C:16]1[C:24]([C:26]1[CH:31]=[CH:30][C:29]([O:32][C:2]2[C:3]([CH:8]3[CH2:13][CH2:12][C:11](=[O:14])[CH2:10][CH2:9]3)=[CH:33][CH:5]=[CH:6][N:7]=2)=[CH:28][CH:27]=1)=[O:25]

Participants

Conditions

Temperature: 140 °C

Procedure

4-(3-Chloropyrazin-2-yl)cyclohexanone (0.10 g, 0.48 mmol), (1H-benzo[d]imidazol-2-yl)(4-hydroxyphenyl)methanone (0.34 g, 1.42 mmol), and cesium carbonate (0.46 mL, 1.42 mmol) were mixed in NMP (1.5 mL). The reaction mixture was placed under a nitrogen atmosphere and stirred at 140° C. for 16 h. The reaction mixture was cooled to room temperature, diluted with water, and extracted with EtOAc. The organic layer was washed with 1 M aqueous sodium hydroxide, washed with sat. sodium chloride, dried over magnesium sulfate, and concentrated in vacuo. The resulting crude product was purified by silica gel chromatography to give 4-(2-(4-(1H-benzo[d]imidazole-2-carbonyl)phenoxy)pyridin-3-yl)cyclohexanone. MS (ESI, pos. ion) m/z: 413.1 (M+1). IC50 (uM) +++++.

Workup

temperatureThe reaction mixture was cooled to room temperature
extractionextracted with EtOAc
washThe organic layer was washed with 1 M aqueous sodium hydroxide
washwashed with sat. sodium chloride
dry with materialdried over magnesium sulfate
concentrationconcentrated in vacuo
customThe resulting crude product was purified by silica gel chromatography

Sources & evidence

ORD record: ord-1c838f1efb414c9e89a6ac921c9b9d73
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08053438B2

Reaction notes

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