Potassium Carbonate → 2-Pyridinyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylate

HRID 383224Notes

Reaction equation

HRID 383224 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:27]([F:30])([F:29])[F:28])[O:13][N:12]=[C:11]([C:14]3[C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[C:17]([C:24]([OH:26])=[O:25])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.C(Cl)(=O)C(Cl)=O.O[C:38]1[CH:43]=[CH:42][CH:41]=[CH:40][N:39]=1.C([O-])([O-])=O.[K+].[K+]>ClCCl.CN(C)C=O>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:27]([F:28])([F:30])[F:29])[O:13][N:12]=[C:11]([C:14]3[C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[C:17]([C:24]([O:26][C:38]4[CH:43]=[CH:42][CH:41]=[CH:40][N:39]=4)=[O:25])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 65578Oxalyl chlorideHCID 583386304-[5-(3,5-Dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylic acidHCID 178516071HCID 178516071, compound

Product 1

HCID 685124832-Pyridinyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylateYield 46%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideCatalystHCID 6344DichloromethaneSolvent2×

Procedure

To a stirred suspension of 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylic acid (prepared according to the procedure described in WO 2007/079162, 1.50 g, 3.30 mmol) in dichloromethane (15 mL) at room temperature was added oxalyl chloride (0.58 mL, 6.60 mmol) followed by one drop of N,N-dimethylformamide. The reaction mixture was stirred at room temperature for 2 h and then concentrated under vacuum. The residue was dissolved in dichloromethane (10 mL) and added to a stirred suspension of 2-hydroxypyridine (0.38 g, 3.96 mmol) and K2CO3 (1.37 g, 9.90 mmol) in dichloromethane (15 mL) at room temperature. The resulting reaction mixture was stirred at room temperature overnight. The reaction mixture was filtered through a short pad of Celite® diatomaceous filter aid, and the pad was rinsed with dichloromethane. The combined filtrate was concentrated and the residue was purified by column chromatography on silica gel using hexane/EtOAc as eluent to provide the title product as a yellow solid (0.80 g, 46% yield).

Workup

  1. customprepared
  2. customat room temperature
  3. concentrationconcentrated under vacuum
  4. dissolutionThe residue was dissolved in dichloromethane (10 mL)
  5. customThe resulting reaction mixture
  6. stirringwas stirred at room temperature overnight
  7. filtrationThe reaction mixture was filtered through a short pad of Celite® diatomaceous filter aid
  8. washthe pad was rinsed with dichloromethane
  9. concentrationThe combined filtrate was concentrated
  10. customthe residue was purified by column chromatography on silica gel

Sources & evidence

ORD record
ord-c35ce055db994dbca3abd04216ff14cc
Source dataset
uspto-grants-2013_02
Patent number
US08367584B2

Reaction notes

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