3-Bromo-1,1,1-trifluoro-2-propanone → 2-(3-chloro-4-methylphenyl)-4-hydroxy-1-(4-(methylsulfonyl)phenyl]-4-(trifluoromethyl)-4,5-dihydro-1H-imidazole

HRID 1166329Notes

Reaction equation

HRID 1166329 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:9](=[NH:21])[NH:10][C:11]2[CH:16]=[CH:15][C:14]([S:17]([CH3:20])(=[O:19])=[O:18])=[CH:13][CH:12]=2)[CH:5]=[CH:6][C:7]=1[CH3:8].C(=O)(O)[O-].[Na+].Br[CH2:28][C:29](=[O:34])[C:30]([F:33])([F:32])[F:31]>C(O)(C)C>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2[N:10]([C:11]3[CH:16]=[CH:15][C:14]([S:17]([CH3:20])(=[O:18])=[O:19])=[CH:13][CH:12]=3)[CH2:28][C:29]([OH:34])([C:30]([F:33])([F:32])[F:31])[N:21]=2)[CH:5]=[CH:6][C:7]=1[CH3:8]

Participants

5

Reactant 3

HCID 790083-Bromo-1,1,1-trifluoro-2-propanoneHCID 516892Sodium BicarbonateHCID 178425633HCID 178425633, compound

Product 1

HCID 117970112-(3-chloro-4-methylphenyl)-4-hydroxy-1-(4-(methylsulfonyl)phenyl]-4-(trifluoromethyl)-4,5-dihydro-1H-imidazoleYield 25%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

To a mixture of 3-chloro-4-methyl-N-(4-(methylsulfonyl)phenyl]benzenecarboximidamide from Step 1 (2.35 g, 7.3 mmol) and sodium bicarbonate (1.23 g, 14.6 mmol) in isopropanol (100 mL), 3-bromo-1,1,1-trifluoroacetone (5.4 mL, 52 mmol) was added. After heating to reflux the reaction mixture for 24 hours, the solvent was removed. The residue was redissolved in methylene chloride and washed with water. The organic fractions were combined, dried over sodium sulfate, filtered and concentrated in vacuo. The crude mixture (7.3 g) was purified by chromatography (silica gel, toluene/ethyl acetate, 1/1) to give 2-(3-chloro-4-methylphenyl)-4-hydroxy-1-[4-(methylsulfonyl)phenyl]-4-(trifluoromethyl)-4,5-dihydro-1H-imidazole (0.79 g, 25%) as a white solid: mp 201° C. Anal. Calc'd. for C18H16N2SO3F3Cl.0.5 PhCH3: C, 53.92, H, 4.21, N, 5.81. Found: C, 54.20, H, 4.19, N, 5.67.

Workup

  1. additionwas added
  2. temperatureAfter heating
  3. temperatureto reflux the reaction mixture for 24 hours
  4. customthe solvent was removed
  5. dissolutionThe residue was redissolved in methylene chloride
  6. washwashed with water
  7. dry with materialdried over sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customThe crude mixture (7.3 g) was purified by chromatography (silica gel, toluene/ethyl acetate, 1/1)

Sources & evidence

ORD record
ord-c021391e235546fa92c4fb82975098d6
Source dataset
uspto-grants-2003_09
Patent number
US06613789B2

Reaction notes

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