Imidazole → 2-(4-((S)-2-((1H-imidazol-1-yl)methyl)-4-(thiophen-2-ylsulfonyl)piperazin-1-yl)phenyl)-1,1,1-trifluoro-2-propanol

HRID 1972541Notes

Reaction equation

HRID 1972541 reaction equation
CS(O[CH2:6][C@H:7]1[CH2:12][N:11]([S:13]([C:16]2[S:17][CH:18]=[CH:19][CH:20]=2)(=[O:15])=[O:14])[CH2:10][CH2:9][N:8]1[C:21]1[CH:26]=[CH:25][C:24]([C:27]([OH:33])([CH3:32])[C:28]([F:31])([F:30])[F:29])=[CH:23][CH:22]=1)(=O)=O.[NH:34]1[CH:38]=[CH:37][N:36]=[CH:35]1.C(=O)([O-])[O-].[Cs+].[Cs+]>C(#N)C.O>[N:34]1([CH2:6][C@H:7]2[CH2:12][N:11]([S:13]([C:16]3[S:17][CH:18]=[CH:19][CH:20]=3)(=[O:15])=[O:14])[CH2:10][CH2:9][N:8]2[C:21]2[CH:26]=[CH:25][C:24]([C:27]([OH:33])([CH3:32])[C:28]([F:31])([F:29])[F:30])=[CH:23][CH:22]=2)[CH:38]=[CH:37][N:36]=[CH:35]1

Participants

6

Reactant 3

HCID 795ImidazoleHCID 10796Cesium carbonateHCID 86670301((2R)-4-(2-thiophenylsulfonyl)-1-(4-(2,2,2-trifluoro-1-hydroxy-1-methylethyl)phenyl)-2-piperazinyl)methyl methanesulfonate2×

Product 1

HCID 665823322-(4-((S)-2-((1H-imidazol-1-yl)methyl)-4-(thiophen-2-ylsulfonyl)piperazin-1-yl)phenyl)-1,1,1-trifluoro-2-propanolYield 77.7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6342AcetonitrileSolvent

Conditions

Temperature
80 °C

Procedure

To a 50-mL round-bottomed flask was added ((2R)-4-(thiophen-2-ylsulfonyl)-1-(4-(1,1,1-trifluoro-2-hydroxypropan-2-yl)phenyl)piperazin-2-yl)methyl methanesulfonate (38 mg, 0.072 mmol, Intermediate B), imidazole (7 mg, 0.11 mmol, Aldrich, St. Louis, Mo.) and cesium carbonate (46 mg, 0.14 mmol) in acetonitrile (2 mL). The reaction mixture was stirred at 80° C. for 18 h. The reaction mixture was diluted with water (10 mL) and extracted with CH2Cl2 (2×40 mL). The organic extracts were washed with saturated NaCl (10 mL) and dried over Na2SO4. The solution was filtered and concentrated in vacuo to give the crude material as an off-white glass. The crude product was purified by silica gel chromatography, eluting with 5% MeOH in EtOAc to give 2-(4-((S)-2-((1H-imidazol-1-yl)methyl)-4-(thiophen-2-ylsulfonyl)piperazin-1-yl)phenyl)-1,1,1-trifluoro-2-propanol (28 mg) as a white solid.

Workup

  1. extractionextracted with CH2Cl2 (2×40 mL)
  2. washThe organic extracts were washed with saturated NaCl (10 mL)
  3. dry with materialdried over Na2SO4
  4. filtrationThe solution was filtered
  5. concentrationconcentrated in vacuo
  6. customto give the crude material as an off-white glass
  7. customThe crude product was purified by silica gel chromatography
  8. washeluting with 5% MeOH in EtOAc

Sources & evidence

ORD record
ord-f52feb78083f477397f115bae32ad44c
Source dataset
uspto-grants-2013_04
Patent number
US08431563B2

Reaction notes

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