Water → 4-bromo-2-methyl-1-(2-methyl-3-(trifluoromethyl)benzyl)-6-nitro-1H-benzo[d]imidazole

HRID 1622444Notes

Reaction equation

[Br:1][C:2]1[C:10]2[N:9]=[C:8]([CH3:11])[NH:7][C:6]=2[CH:5]=[C:4]([N+:12]([O-:14])=[O:13])[CH:3]=1.Br[CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[C:18]=1[CH3:27].C(=O)([O-])[O-].[Cs+].[Cs+].O>CN(C=O)C>[Br:1][C:2]1[C:10]2[N:9]=[C:8]([CH3:11])[N:7]([CH2:16][C:17]3[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:24])([F:25])[F:26])[C:18]=3[CH3:27])[C:6]=2[CH:5]=[C:4]([N+:12]([O-:14])=[O:13])[CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of 4-bromo-2-methyl-6-nitro-1H-benzo[d]imidazole (22 g, 78 mmol), prepared as described in example 1, step b, 1-(bromomethyl)-2-methyl-3-(trifluoromethyl)benzene (22 g, 86 mmol) and cesium carbonate (38 g, 117 mmol) in DMF (400 mL) was stirred at 80° C. for 3 h. After cooled to room temperature, the mixture was poured into 300 mL of water and extracted with ethyl acetate (200 mL×3). The combined organic layers were washed with brine, dried over sodium sulphate and combined with a separate batch prepared similarly and then evaporated to give the crude product (55 g, 62%) as a yellow solid; LC/MS: MS (ES+) m/e 428 [M+H]+; 1H NMR (300 MHz, DMSO-d6) δ ppm 2.54 (s, 3H), 2.55 (s, 3H), 5.78 (s, 2H), 6.35 (d, J=7.8 Hz, 1H), 7.25 (t, J=7.8 Hz, 1H), 7.63 (d, J=7.8 Hz, 1H), 8.31 (d, J=1.5 Hz, 1H), 8.63 (d, J=1.5 Hz, 1H).

Workup

customprepared
temperatureAfter cooled to room temperature
extractionextracted with ethyl acetate (200 mL×3)
washThe combined organic layers were washed with brine
dry with materialdried over sodium sulphate
customprepared similarly
customevaporated

Sources & evidence

ORD record: ord-ce0c9fe8fe954eadb9e33d59e41c471a
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08778937B2

Reaction notes

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