Acetic Anhydride → N-[2-(4-Phenylethynylbenzamido)benzenesulfonyl]acetamide

HRID 1268132Notes

Reaction equation

HRID 1268132 reaction equation
C(O[C:5](=[O:7])[CH3:6])(=O)C.[C:8]1([C:14]#[C:15][C:16]2[CH:34]=[CH:33][C:19]([C:20]([NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[S:29](=[O:32])(=[O:31])[NH2:30])=[O:21])=[CH:18][CH:17]=2)[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>CN(C)C1C=CN=CC=1.O1CCCC1>[C:8]1([C:14]#[C:15][C:16]2[CH:34]=[CH:33][C:19]([C:20]([NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[S:29]([NH:30][C:5](=[O:7])[CH3:6])(=[O:31])=[O:32])=[O:21])=[CH:18][CH:17]=2)[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1

Participants

5

Reactant 2

HCID 7918Acetic AnhydrideHCID 120430434-Phenylethynyl-N-(2-sulfamoylphenyl)benzamide

Product 1

HCID 59057402N-[2-(4-Phenylethynylbenzamido)benzenesulfonyl]acetamideYield 79%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8028TetrahydrofuranSolvent

Procedure

In a stream of nitrogen and at 0° C., 0.15 ml (1.60 mmol) of acetic anhydride was added to an anhydrous tetrahydrofuran (10 ml) solution containing 500 mg (1.30 mmol) of 4-phenylethynyl-N-(2-sulfamoylphenyl)benzamide produced in Reference Example 10 and 320 mg (2.60 mmol) of 4-dimethylaminopyridine, the mixture was stirred at room temperature for 1 hour and then the solvent was evaporated under a reduced pressure. The resulting residue was dissolved in ethyl acetate, washed with water, a potassium hydrgensulfate aqueous solution and saturated brine in that order and dried over anhydrous sodium sulfate, and then the solvent was evaporated under a reduced pressure. The resulting residue was recrystallized from methanol to obtain 430 mg (yield: 77.6%) of the title compound.

Workup

  1. customthe solvent was evaporated under a reduced pressure
  2. dissolutionThe resulting residue was dissolved in ethyl acetate
  3. washwashed with water
  4. dry with materiala potassium hydrgensulfate aqueous solution and saturated brine in that order and dried over anhydrous sodium sulfate
  5. customthe solvent was evaporated under a reduced pressure
  6. customThe resulting residue was recrystallized from methanol

Sources & evidence

ORD record
ord-1d90a2674f8041d38dca4d7271d7b1ce
Source dataset
uspto-grants-2003_04
Patent number
US06555584B1

Reaction notes

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