Potassium Carbonate → methyl 1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-2-(trifluoromethyl)-1H-benzimidazole-4-carboxylate

HRID 539202Notes

Reaction equation

HRID 539202 reaction equation
[N:1]1([C:7]2[CH:19]=[C:18]([C:20]([O:22][CH3:23])=[O:21])[C:10]3[NH:11][C:12]([C:14]([F:17])([F:16])[F:15])=[N:13][C:9]=3[CH:8]=2)[CH2:6][CH2:5][O:4][CH2:3][CH2:2]1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[C:34]([C:38]([F:41])([F:40])[F:39])[C:33]=1[CH3:42]>CN(C)C=O>[CH3:42][C:33]1[C:34]([C:38]([F:39])([F:40])[F:41])=[CH:35][CH:36]=[CH:37][C:32]=1[CH2:31][N:13]1[C:9]2[CH:8]=[C:7]([N:1]3[CH2:6][CH2:5][O:4][CH2:3][CH2:2]3)[CH:19]=[C:18]([C:20]([O:22][CH3:23])=[O:21])[C:10]=2[N:11]=[C:12]1[C:14]([F:17])([F:15])[F:16]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 27756171-(Bromomethyl)-2-methyl-3-(trifluoromethyl)benzeneHCID 178498369HCID 178498369, compound

Product 1

HCID 56960128methyl 1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-2-(trifluoromethyl)-1H-benzimidazole-4-carboxylateYield 24.12%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A suspension of methyl 5-(4-morpholinyl)-2-(trifluoromethyl)-1H-benzimidazole-7-carboxylate, prepared as described in Example 45 (1.5 g, 4.56 mmol) and potassium carbonate (1.889 g, 13.67 mmol) in N,N-Dimethylformamide (DMF) (10 mL) was stirred at rt for 15 min. 1-(Bromomethyl)-2-methyl-3-(trifluoromethyl)benzene (1.729 g, 6.83 mmol) was added in and the resulting reaction mixture was stirred for 3 h at 80° C. The mixture was then cooled to room temperature and poured into ice/water. The precipitate was collected by filtration, washed with water, then hexanes (turned into a gum on the filter paper—some material was lost). The crude material was purified on a silica gel column (ISCO, eluting with 0-5% MeOH in DCM) to give the desired product (580 mg, 1.099 mmol, 24.12% yield) (several mixed fractions obtained were discarded). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.65 (d, J=2.53 Hz, 1H), 7.61 (d, J=7.83 Hz, 1H), 7.37 (d, J=2.27 Hz, 1H), 7.23 (t, J=7.96 Hz, 1H), 6.29 (d, J=7.58 Hz, 1H), 5.76 (s, 2H), 3.93 (s, 3H), 3.70-3.78 (m, 4H), 3.12-3.22 (m, 4H), 2.53 (s, 3H). MS (ES+) m/e 502 [M+H]+.

Workup

  1. customprepared
  2. customthe resulting reaction mixture
  3. stirringwas stirred for 3 h at 80° C
  4. temperatureThe mixture was then cooled to room temperature
  5. filtrationThe precipitate was collected by filtration
  6. washwashed with water
  7. customThe crude material was purified on a silica gel column (ISCO, eluting with 0-5% MeOH in DCM)

Sources & evidence

ORD record
ord-c94d15f236a744089411cec2bebafcc5
Source dataset
uspto-grants-2014_10
Patent number
US08865912B2

Reaction notes

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