3,3,3-Trifluoropropionic acid → HCID 67247875, compound

Participants

Reaction Steps

To a solution of 4-[5-(chloro-difluoro-methyl)-5-(3,5-dichloro-phenyl)-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid tert-butyl ester (1.95 g) in dichloromethane (20 ml) was added trifluoromethyl acetic acid (“TFA”) (3 ml). The reaction mixture was stirred at ambient temperature for 16 hours. The dichloromethane was removed by distillation. The residue was purified over silica gel (eluent: ethyl acetate/heptane gradient from 1:1 to 1:0) to give 4-[5-(Chloro-difluoro-methyl)-5-(3,5-dichloro-phenyl)-4,5-dihydro-isoxazol-3-yl]-2-methyl-benzoic acid (1.37 g). 1H-NMR (CDCl3, 400 MHz): 8.10 (d, 1H), 7.65-7.45 (m, 5H), 4.15 (m, 1H), 3.75 (d, 1H), 2.70 (s, 3H).

Provenance & Evidence