Acetic Acid → N-benzyl-N-nitroso-2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-(4,4-difluoro-cyclohexyl)-acetamide

HRID 417147Notes

Reaction equation

HRID 417147 reaction equation
[CH2:1]([NH:8][C:9](=[O:37])[CH:10]([N:19]1[C:23]2[CH:24]=[C:25]([F:29])[C:26]([F:28])=[CH:27][C:22]=2[N:21]=[C:20]1[C:30]1[CH:35]=[CH:34][C:33]([Cl:36])=[CH:32][CH:31]=1)[CH:11]1[CH2:16][CH2:15][C:14]([F:18])([F:17])[CH2:13][CH2:12]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(O)(=O)C.C(OC(=O)C)(=O)C.[N:49]([O-])=[O:50].[Na+]>>[CH2:1]([N:8]([N:49]=[O:50])[C:9](=[O:37])[CH:10]([N:19]1[C:23]2[CH:24]=[C:25]([F:29])[C:26]([F:28])=[CH:27][C:22]=2[N:21]=[C:20]1[C:30]1[CH:31]=[CH:32][C:33]([Cl:36])=[CH:34][CH:35]=1)[CH:11]1[CH2:16][CH2:15][C:14]([F:17])([F:18])[CH2:13][CH2:12]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 4

HCID 176Acetic AcidHCID 7918Acetic AnhydrideHCID 23668193Sodium NitriteHCID 66619400N-benzyl-2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-(4,4-difluoro-cyclohexyl)-acetamide

Product 1

HCID 86639901N-benzyl-N-nitroso-2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-(4,4-difluoro-cyclohexyl)-acetamide

Procedure

To a ice-cold solution of 3.10 g (5.85 mMol) N-benzyl-2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-(4,4-difluoro-cyclohexyl)-acetamide in 19.1 ml (333 mmol) acetic acid and 40.14 ml (708 mmol) acetic anhydride were added in portions over 20 min. 2.02 g (29.25 mmol) sodium nitrite. The reaction mixture was stirred overnight at room temperature and evaporated. The residue was taken up in saturated aqueous sodium bicarbonate solution and ethyl acetate and the pH was adjusted to 7 by adding solid sodium bicarbonate. The aqueous layer was extracted twice with ethyl acetate and the combined organic layers were washed with brine, dried over magnesium sulfate, filtered and evaporated to dryness. Yellow foam (85%). MS (Turbo Spray): m/z=559.2 [M+H].

Workup

  1. customevaporated
  2. additionby adding solid sodium bicarbonate
  3. extractionThe aqueous layer was extracted twice with ethyl acetate
  4. washthe combined organic layers were washed with brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. customevaporated to dryness

Sources & evidence

ORD record
ord-04bbba8c3b774552a82a268e6e257fb9
Source dataset
uspto-grants-2012_01
Patent number
US08088930B2

Reaction notes

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