Thionyl Chloride → 4-[5-(3,5-Dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl] benzoic acid chloride

HRID 910344Notes

Reaction equation

HRID 910344 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:23]([F:26])([F:25])[F:24])[O:13][N:12]=[C:11]([C:14]3[CH:22]=[CH:21][C:17]([C:18](O)=[O:19])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.S(Cl)([Cl:29])=O>C1C=CC=CC=1.CN(C)C=O>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:23]([F:25])([F:24])[F:26])[O:13][N:12]=[C:11]([C:14]3[CH:15]=[CH:16][C:17]([C:18]([Cl:29])=[O:19])=[CH:21][CH:22]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1

Participants

5

Reactant 2

HCID 24386Thionyl ChlorideHCID 251573784-[5-(3,5-Dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]benzoic acid

Product 1

HCID 871502064-[5-(3,5-Dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl] benzoic acid chlorideYield 173.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideCatalystHCID 241BenzeneSolvent

Procedure

In a suspension of 1.00 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole-3-yl]benzoic acid in 10 ml of benzene, 0.44 g of thionyl chloride and a catalytic amount (2 to 3 drops) of N,N-dimethylformamide were added, and stirred under reflux with heat for 2.5 hours. After the completion of the reaction, the solvent was distilled off under reduced pressure to obtain 1.81 g of crude 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole-3-yl]benzoic acid chloride as pale yellow oily substance.

Workup

  1. temperatureunder reflux
  2. temperaturewith heat for 2.5 hours
  3. customAfter the completion of the reaction
  4. distillationthe solvent was distilled off under reduced pressure

Sources & evidence

ORD record
ord-0fbe09df82ed47d894b4dffd640efdb3
Source dataset
uspto-grants-2011_09
Patent number
US08022089B2

Reaction notes

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