3-Bromo-1,1,1-trifluoro-2-propanone → 2-Methyl-6-[4-hydroxy-1-[4-(methylsulfonyl) phenyl]-4-(trifluoromethyl)-4,5-dihydro-1h-imidazol-2-yl]pyridine

HRID 1352977Notes

Reaction equation

HRID 1352977 reaction equation
[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([C:8](=[NH:20])[NH:9][C:10]2[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[CH:12][CH:11]=2)[N:3]=1.C(=O)(O)[O-].[Na+].Br[CH2:27][C:28](=[O:33])[C:29]([F:32])([F:31])[F:30]>C(O)(C)C>[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([C:8]2[N:9]([C:10]3[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[CH:12][CH:11]=3)[CH2:27][C:28]([OH:33])([C:29]([F:32])([F:31])[F:30])[N:20]=2)[N:3]=1

Participants

5

Reactant 3

HCID 790083-Bromo-1,1,1-trifluoro-2-propanoneHCID 516892Sodium BicarbonateHCID 178425254HCID 178425254, compound

Product 1

HCID 229977732-Methyl-6-[4-hydroxy-1-[4-(methylsulfonyl) phenyl]-4-(trifluoromethyl)-4,5-dihydro-1h-imidazol-2-yl]pyridineYield 21%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

To a mixture of the amidine of Step 1 (4.9 g, 16.95 mmol) and sodium bicarbonate (2.85 g, 33.9 mmol) in isopropanol (300 ml), 3-bromo-1,1,1-trifluoroacetone (2.65 ml, 25.4 mmol) was added. After heating at 80–85° C. for 24 hours, the reaction mixture was cooled and filtered. The residue was washed with methylene chloride and the combined organic fractions were dried over sodium sulfate, filtered and concentrated. The crude mixture (9 g) was purified by chromatography (silica gel, ethyl acetate/isopropanol/ammonium hydroxide 95/5/0.5) to give 2-methyl-6-[4-hydroxy-1-[4-(methylsulfonyl)phenyl]-4-(trifluoromethyl)-4,5-dihydro-1H-imidazol-2-yl]pyridine (1.4 g, 21%) as a white solid: Anal. Calc'd. for C17H16N3SO3F3: C, 51.12; H, 4.02; N, 10.52. Found: C, 51.43; H, 3.96; N, 10.06.

Workup

  1. additionwas added
  2. temperatureAfter heating at 80–85° C. for 24 hours
  3. temperaturethe reaction mixture was cooled
  4. filtrationfiltered
  5. washThe residue was washed with methylene chloride
  6. dry with materialthe combined organic fractions were dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude mixture (9 g) was purified by chromatography (silica gel, ethyl acetate/isopropanol/ammonium hydroxide 95/5/0.5)

Sources & evidence

ORD record
ord-c1450cefad9b4b60a13ba0e8af33ff97
Source dataset
uspto-grants-2007_05
Patent number
US07220770B2

Reaction notes

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