Triethylamine → Methyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylate

HRID 2424246Notes

Reaction equation

HRID 2424246 reaction equation
[OH:1][N:2]=[CH:3][C:4]1[C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[C:7]([C:14]([O:16][CH3:17])=[O:15])=[CH:6][CH:5]=1.ClN1C(=O)CCC1=O.[Cl:26][C:27]1[CH:32]=[C:31]([C:33]([C:35]([F:38])([F:37])[F:36])=[CH2:34])[CH:30]=[C:29]([Cl:39])[CH:28]=1.C(N(CC)CC)C>CN(C)C=O.O>[Cl:26][C:27]1[CH:32]=[C:31]([C:33]2([C:35]([F:38])([F:36])[F:37])[O:1][N:2]=[C:3]([C:4]3[C:13]4[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=4)[C:7]([C:14]([O:16][CH3:17])=[O:15])=[CH:6][CH:5]=3)[CH2:34]2)[CH:30]=[C:29]([Cl:39])[CH:28]=1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 31398ChlorosuccinimideHCID 231598231,3-Dichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzeneHCID 86645276Methyl 4-[(hydroxyimino)methyl]-1-naphthalenecarboxylate2×

Product 1

HCID 58338637Methyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylateYield 34%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a stirred solution of methyl 4-[(hydroxyimino)methyl]-1-naphthalenecarboxylate (i.e. the product from Step A) (1.0 g, 4.36 mmol) in N,N-dimethylformamide (5.0 mL) was added N-chlorosuccinimide (1.16 g, 8.72 mmol). This mixture was stirred for 1.5 h at room temperature, and then a solution of 1,3-dichloro-5-[1-(trifluoromethyl)ethenyl]benzene (i.e. the product from Step B) (3.20 g, 13.1 mmol) and triethylamine (6.1 mL, 43.6 mmol) in N,N-dimethylformamide (4.0 mL) was added. After stirring for additional 2 h at room temperature, the reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with brine, dried (Na2SO4), and concentrated under reduced pressure. The residue was purified by silica gel chromatography using hexanes/ethyl acetate as eluent to afford the title compound as a pale yellow oil (700 mg, 34% yield).

Workup

  1. stirringAfter stirring for additional 2 h at room temperature
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-64199c09f9454af7848d90dcd9a0c5ef
Source dataset
uspto-grants-2011_06
Patent number
US07964204B2

Reaction notes

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