Diisobutylaluminumhydride → 4-(2,2-dimethylpropyl)-2-{2-[4-(5-fluoropyridin-2-yl)phenyl]-1-hydroxyethyl}-N,N-dimethyl-1H-imidazole-1-sulfonamide

HRID 425349Notes

Reaction equation

HRID 425349 reaction equation
[H-].C([Al+]CC(C)C)C(C)C.[CH3:11][C:12]([CH3:43])([CH2:41]C)[CH2:13][C:14]1[N:15]=[C:16]([C:25](=[O:40])[CH2:26][C:27]2[CH:32]=[CH:31][C:30]([C:33]3[CH:38]=[CH:37][C:36]([F:39])=[CH:35][N:34]=3)=[CH:29][CH:28]=2)[N:17]([S:19]([N:22]([CH3:24])[CH3:23])(=[O:21])=[O:20])[CH:18]=1>O1CCCC1>[CH3:11][C:12]([CH3:43])([CH3:41])[CH2:13][C:14]1[N:15]=[C:16]([CH:25]([OH:40])[CH2:26][C:27]2[CH:32]=[CH:31][C:30]([C:33]3[CH:38]=[CH:37][C:36]([F:39])=[CH:35][N:34]=3)=[CH:29][CH:28]=2)[N:17]([S:19]([N:22]([CH3:24])[CH3:23])(=[O:21])=[O:20])[CH:18]=1

Participants

4

Reactant 2

HCID 21225700DiisobutylaluminumhydrideHCID 667056774-(2,2-dimethylbutyl)-2-{[4-(5-fluoropyridin-2-yl)phenyl]acetyl}-N,N-dimethyl-1H-imidazole-1-sulfonamide

Product 1

HCID 667057674-(2,2-dimethylpropyl)-2-{2-[4-(5-fluoropyridin-2-yl)phenyl]-1-hydroxyethyl}-N,N-dimethyl-1H-imidazole-1-sulfonamide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

Diisobutylaluminum hydride (1 M in methylene chloride) (0.91 mL, 0.91 mmol) was added to a −78° C. solution of 4-(2,2-dimethylbutyl)-2-{[4-(5-fluoropyridin-2-yl)phenyl]acetyl}-N,N-dimethyl-1H-imidazole-1-sulfonamide (for synthesis see example 15) (200 mg, 0.45 mmol) in tetrahydrofuran (5 mL). The reaction was allowed to warm to 0° C., quenched with saturated aqueous sodium potassium tartrate and stirred vigorously at ambient temperature until layers separated. The aqueous phase was extracted with methylene chloride. The combined organic extracts were dried (magnesium sulfate) and concentrated in vacuo to afford 4-(2,2-dimethylpropyl)-2-{2-[4-(5-fluoropyridin-2-yl)phenyl]-1-hydroxyethyl}-N,N-dimethyl-1H-imidazole-1-sulfonamide which was used in the subsequent step without further purification.

Workup

  1. customquenched with saturated aqueous sodium potassium tartrate
  2. customseparated
  3. extractionThe aqueous phase was extracted with methylene chloride
  4. dry with materialThe combined organic extracts were dried (magnesium sulfate)
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-2fa4ef592cab49acae5321b9c25a7516
Source dataset
uspto-grants-2012_01
Patent number
US08106070B2

Reaction notes

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