Water → HCID 11965692, compound

HRID 906505Notes

Reaction equation

HRID 906505 reaction equation
[CH3:1][O:2][C:3](=[O:21])[C:4]1[CH:9]=[C:8]([C:10](=[O:12])[CH3:11])[C:7]([C:13]([F:16])([F:15])[F:14])=[CH:6][C:5]=1[NH:17]C(=O)C.O.S(=O)(=O)(O)O>CO.CCOC(C)=O>[CH3:1][O:2][C:3](=[O:21])[C:4]1[CH:9]=[C:8]([C:10](=[O:12])[CH3:11])[C:7]([C:13]([F:14])([F:16])[F:15])=[CH:6][C:5]=1[NH2:17]

Participants

6

Reactant 3

HCID 962WaterHCID 1118Sulfuric AcidHCID 591644065-Acetyl-2-acetylamino-4-trifluoromethyl-benzoic acid methyl ester

Product 1

HCID 11965692HCID 11965692, compoundYield 100%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 5-acetyl-2-acetylamino-4-trifluoromethyl-benzoic acid methyl ester (11.5 g, 37.8 mmol) in MeOH (120 mL)/water (24 mL) was cooled to 0° C. and concentrated sulfuric acid (15.0 mL, 271 mmol) was added dropwise. Upon completion of the addition, the mixture was heated to reflux for 45 min under nitrogen, and then allowed to cool to r.t. The mixture was diluted with EtOAc and washed once with water. The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo providing 5-acetyl-2-amino-4-trifluoromethyl-benzoic acid methyl ester (9.87 g, 37.8 mmol, quantitative) as a white solid, m.p. 118-121° C., ESI-MS: m/z 262 [M+H]+.

Workup

  1. additionUpon completion of the addition
  2. temperaturethe mixture was heated
  3. temperatureto reflux for 45 min under nitrogen
  4. washwashed once with water
  5. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-0521eb1ce01b402a95649d4c42c26c70
Source dataset
uspto-grants-2011_09
Patent number
US08012988B2

Reaction notes

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