Ethyl Acetate → 4-(5-(3,5-Dichlorophenyl)-5-(tri fluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-methylbenzoic acid

HRID 467945Notes

Reaction equation

HRID 467945 reaction equation
C([O:5][C:6](=[O:31])[C:7]1[CH:12]=[CH:11][C:10]([C:13]2[CH2:17][C:16]([C:22]3[CH:27]=[C:26]([Cl:28])[CH:25]=[C:24]([Cl:29])[CH:23]=3)([C:18]([F:21])([F:20])[F:19])[O:15][N:14]=2)=[CH:9][C:8]=1[CH3:30])(C)(C)C.FC(CC(O)=O)(F)F.C(OCC)(=O)C>ClCCl>[Cl:29][C:24]1[CH:23]=[C:22]([C:16]2([C:18]([F:20])([F:19])[F:21])[O:15][N:14]=[C:13]([C:10]3[CH:11]=[CH:12][C:7]([C:6]([OH:31])=[O:5])=[C:8]([CH3:30])[CH:9]=3)[CH2:17]2)[CH:27]=[C:26]([Cl:28])[CH:25]=1

Participants

5

Reactant 3

HCID 8857Ethyl AcetateHCID 27779723,3,3-Trifluoropropionic acidHCID 595634964-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid tert-butyl ester

Product 1

HCID 231598114-(5-(3,5-Dichlorophenyl)-5-(tri fluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-methylbenzoic acidYield 84.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid tert-butyl ester (Example I19) (74.14 g) in dichloromethane (750 ml) was added trifluoromethyl acetic acid (“TFA”) (148 ml). The reaction mixture was stirred at ambient temperature for 16 hours. Ethyl acetate was added and the mixture was washed with water, dried over sodium sulfate and concentrated. The residue was crystallized from ethyl acetate and heptane to give 4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid (55.0 g). 1H-NMR (CDCl3, 400 MHz): 8.12 (d, 1H), 7.65-7.45 (m, 5H), 4.15 (d, 1H), 3.75 (d, 1H), 2.75 (s, 3H).

Workup

  1. washthe mixture was washed with water
  2. dry with materialdried over sodium sulfate
  3. concentrationconcentrated
  4. customThe residue was crystallized from ethyl acetate and heptane

Sources & evidence

ORD record
ord-62c0f36e24f541bebcc087a9e288d513
Source dataset
uspto-grants-2014_01
Patent number
US08623896B2

Reaction notes

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