Water → 2,4-dimethyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole

HRID 44559Notes

Reaction equation

HRID 44559 reaction equation
Br[C:2]1[C:10]2[N:9]=[C:8]([CH3:11])[N:7]([CH2:12][C:13]3[CH:18]=[CH:17][CH:16]=[C:15]([C:19]([F:22])([F:21])[F:20])[C:14]=3[CH3:23])[C:6]=2[CH:5]=[C:4]([N:24]2[CH2:29][CH2:28][O:27][CH2:26][CH2:25]2)[CH:3]=1.[CH3:30]B1OB(C)OB(C)O1.C(=O)([O-])[O-].[K+].[K+].O>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:11][C:8]1[N:7]([CH2:12][C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([C:19]([F:20])([F:22])[F:21])[C:14]=2[CH3:23])[C:6]2[CH:5]=[C:4]([N:24]3[CH2:25][CH2:26][O:27][CH2:28][CH2:29]3)[CH:3]=[C:2]([CH3:30])[C:10]=2[N:9]=1

Participants

7

Reactant 4

HCID 962Water2×HCID 11430Potassium CarbonateHCID 574072TrimethylboroxineHCID 569605424-(7-bromo-2-methyl-3-(2-methyl-3-(trifluoromethyl)benzyl)-3H-benzo[d]imidazol-5-yl)morpholine

Product 1

HCID 569608262,4-dimethyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazoleYield 42.5%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 4-bromo-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole, prepared as described in Example 62 (200 mg, 0.427 mmol), trimethylboroxine (0.239 mL, 1.708 mmol), Pd(Ph3P)4 (49.4 mg, 0.043 mmol) and potassium carbonate (118 mg, 0.854 mmol) in 1,4-Dioxane (2.5 mL)/Water (0.25 mL) was irradiated at 120° C. in a microwave synthesizer for 40 min, then cooled and poured into water. The mixture was extracted with ethyl acetate. The extracts were washed with brine, dried (Na2SO4) and evaporated under reduced pressure. The residue was purified by RP-HPLC (25-45% AcCN in water plus 0.1% TFA) to give the desired compound (77 mg, 0.181 mmol, 42.5% yield) as a white solid (contains 3-5% of the 4-H compound). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.58 (d, J=8.08 Hz, 1H), 7.12 (t, J=7.83 Hz, 1H), 6.80 (d, J=1.01 Hz, 1H), 6.51 (d, J=7.83 Hz, 1H), 6.40 (d, J=1.77 Hz, 1H), 5.26 (s, 2H), 3.78-3.91 (m, 4H), 3.01-3.15 (m, 4H), 2.67 (s, 3H), 2.56 (s, 3H), 2.50 (s, 3H). MS (ES+) m/e 404.1 [M+H]+. (NOTE: The reaction was repeated using PdCl2(dppf) as catalyst. Less (to negligible) reduction was observed).

Workup

  1. customprepared
  2. customwas irradiated at 120° C. in a microwave synthesizer for 40 min
  3. temperaturecooled
  4. extractionThe mixture was extracted with ethyl acetate
  5. washThe extracts were washed with brine
  6. dry with materialdried (Na2SO4)
  7. customevaporated under reduced pressure
  8. customThe residue was purified by RP-HPLC (25-45% AcCN in water plus 0.1% TFA)

Sources & evidence

ORD record
ord-fe5d9a632404460f92ae9e51ec26e1c6
Source dataset
uspto-grants-2013_09
Patent number
US08541411B2

Reaction notes

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