Methanol → 4-[4-Bromo-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methyl-benzoic acid

HRID 69396Notes

Reaction equation

HRID 69396 reaction equation
C([O:3][C:4](=[O:30])[C:5]1[CH:10]=[CH:9][C:8]([C:11]2[CH:15]([Br:16])[C:14]([C:21]3[CH:26]=[C:25]([Cl:27])[CH:24]=[C:23]([Cl:28])[CH:22]=3)([C:17]([F:20])([F:19])[F:18])[O:13][N:12]=2)=[CH:7][C:6]=1[CH3:29])C.O.[OH-].[Li+].CO>O>[Br:16][CH:15]1[C:14]([C:21]2[CH:22]=[C:23]([Cl:28])[CH:24]=[C:25]([Cl:27])[CH:26]=2)([C:17]([F:18])([F:19])[F:20])[O:13][N:12]=[C:11]1[C:8]1[CH:9]=[CH:10][C:5]([C:4]([OH:30])=[O:3])=[C:6]([CH3:29])[CH:7]=1

Participants

5

Reactant 3

HCID 887MethanolHCID 168937Lithium hydroxide, monohydrateHCID 866551484-[4-Bromo-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid ethyl ester

Product 1

HCID 866551474-[4-Bromo-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methyl-benzoic acidYield 88%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 4-[4-bromo-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid ethyl ester (0.71 g, 1.35 mmol) (Example 1.6), lithium hydroxide monohydrate (0.17 g, 4 mmol), methanol (25 ml) and water (5 ml) was stirred at ambient temperature for 60 hours. The mixture was concentrated and the residue dissolved in water. The solution was acidified by addition of aqueous hydrochloric acid (1N). The precipitate was isolated by filtration and dried under vacuum to afford 4-[4-bromo-5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methyl-benzoic acid (0.59 g, 88% yield) as a white powder. 1H-NMR (CDCl3, 400 MHz): 8.05-7.45 (m, 6H), 5.87 (s, 1H), 2.65 (s, 3H) ppm.

Workup

  1. concentrationThe mixture was concentrated
  2. dissolutionthe residue dissolved in water
  3. additionThe solution was acidified by addition of aqueous hydrochloric acid (1N)
  4. customThe precipitate was isolated by filtration
  5. customdried under vacuum

Sources & evidence

ORD record
ord-e2c8185aced54ac89e8c7a80aed00b8b
Source dataset
uspto-grants-2014_09
Patent number
US08822502B2

Reaction notes

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