Sodium hydride → 5,6-Dichloro-1-(3-fluoro-benzyl)-2-(2,2,2-trifluoro-ethyl)-1H-benzoimidazole

HRID 1360948Notes

Reaction equation

[H-].[Na+].ClC1C2N=C(CC(F)(F)F)[N:9](Cl)C=2C=CC=1.[Cl:19][C:20]1[CH:21]=[C:22]2[C:26](=[CH:27][C:28]=1[Cl:29])[NH:25][C:24]([CH2:30][C:31]([F:34])([F:33])[F:32])=C2.[F:35][C:36]1[CH:37]=[C:38]([CH:41]=[CH:42][CH:43]=1)[CH2:39]Br.[NH4+].[Cl-]>CN(C=O)C>[Cl:29][C:28]1[C:20]([Cl:19])=[CH:21][C:22]2[N:9]([CH2:39][C:38]3[CH:41]=[CH:42][CH:43]=[C:36]([F:35])[CH:37]=3)[C:24]([CH2:30][C:31]([F:32])([F:33])[F:34])=[N:25][C:26]=2[CH:27]=1

Participants

Conditions

Temperature: 0 °C

Procedure

NaH (60%) (60 mg, 1.5 mmol) was added into a solution of dichloro-2-(2,2,2-trifluoro-ethyl)-1H-benzoimidazole. 5,6-Dichloro-2-(2,2,2-trifluoro-ethyl)-1H-indole (269 mg, 1 mmol) in DMF (5 ml) at 0° C. The resulting mixture was stirred at 0° C. for half hour. 3-fluorobenzyl bromide (283.5 mg, 1.5 mmol) was then added to the reaction mixture at 0° C. The reaction temperature was raised to 25° C. and then the reaction mixture was stirred for 18 hours. NH4Cl (aq.) was added and extracted with EtOAc. The organic layer was washed with brine, then dried over anhydrous MgSO4. The solvent was distilled out under reduced pressure. Column chromatography (silica gel, EtOAc/hexanes (0% to 60%) yielded the title compound as an off-white solid.

Workup

customat 0° C
temperatureThe reaction temperature was raised to 25° C.
stirringthe reaction mixture was stirred for 18 hours
extractionextracted with EtOAc
washThe organic layer was washed with brine
dry with materialdried over anhydrous MgSO4
distillationThe solvent was distilled out under reduced pressure

Sources & evidence

ORD record: ord-0e2e0ee318694d558e8c7bbbcf34388d
Source dataset: uspto-grants-2011_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07879895B2

Reaction notes

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