Ethanol → Ethyl 4-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-methylbenzoate

HRID 467930Notes

Reaction equation

HRID 467930 reaction equation
C(N([CH2:6][CH3:7])CC)C.Br[C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH2:19][C:18]([C:24]3[CH:29]=[C:28]([Cl:30])[CH:27]=[C:26]([Cl:31])[CH:25]=3)([C:20]([F:23])([F:22])[F:21])[O:17][N:16]=2)=[CH:11][C:10]=1[CH3:32].[C]=[O:34].[CH2:35]([OH:37])C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH2:6]([O:34][C:35](=[O:37])[C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH2:19][C:18]([C:24]3[CH:25]=[C:26]([Cl:31])[CH:27]=[C:28]([Cl:30])[CH:29]=3)([C:20]([F:23])([F:22])[F:21])[O:17][N:16]=2)=[CH:11][C:10]=1[CH3:32])[CH3:7]

Participants

6

Reactant 4

HCID 702EthanolHCID 8471TriethylamineHCID 231598123-(4-Bromo-3-methylphenyl)-5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazoleHCID 178418416HCID 178418416, compound

Product 1

HCID 59563490Ethyl 4-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-methylbenzoate

Reagents, catalysts & solvents 1

HCID 178418476HCID 178418476, compoundCatalyst

Procedure

Triethylamine (1.2 ml) was added at ambient temperature to a solution of 3-(4-bromo-3-methyl-phenyl)-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazole (1.2 g) (Example I3) in ethanol (45 ml). Bis(triphenylphosphine)palladium(II) dichloride (“PdCl2(PPh3)2”) (0.185 g) was added and the reaction mixture was stirred in a pressure reactor in an atmosphere of carbon monoxide (120 bar) at 115° C. for 8 hours. The reaction mixture was cooled to ambient temperature, filtered over Celite® and concentrated. The residue was purified by preparative HPLC to give 4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid ethyl ester (0.85 g) as a yellow oil. 1H-NMR (CDCl3, 400 MHz): 7.95 (d, 1H), 7.55 (m, 4H), 7.45 (s, 1H), 4.40 (q, 2H), 4.10 (d, 1H), 3.7 (d, 1H), 2.60 (s, 3H), 1.40 (t, 3H) ppm.

Workup

  1. filtrationfiltered over Celite®
  2. concentrationconcentrated
  3. customThe residue was purified by preparative HPLC

Sources & evidence

ORD record
ord-64a2003d007e45cb9e2ae6d451a2a358
Source dataset
uspto-grants-2014_01
Patent number
US08623896B2

Reaction notes

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