Hydrochloric Acid → 5-(5-(3,5-Dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-fluorobenzonitrile

Participants

Reaction Conditions

Reaction Steps

2.50 g of toluene and 1.50 g of N-methyl-2-pyrrolidone were added to 0.50 g (1.29 mmol) of 5-(3-(3,5-dichlorophenyl)-4,4,4-trifluoro-2-butenoyl)-2-fluorobenzonitrile, and the mixture was cooled to 0° C. After adding in dropwise to this mixture the solution which was prepared by adding 0.52 g of water to 0.21 g (5.16 mmol) of sodium hydroxide, and then adding the solution in which 0.099 g (1.42 mmol) of hydroxylamine hydrochloride was dissolved into 0.21 g of water in dropwise, the mixture was stirred for 2 hours at 0° C. The aqueous solution which was prepared from 0.81 g (7.74 mmol) of 35% hydrochloric acid and 2.42 g of water was added in dropwise to the reaction solution, and the mixture was stirred for 1 hour. 10 ml of toluene was added and separation operation was performed. The toluene phase was washed twice with 5 ml of water. The solvent was distilled off under reduced pressure to obtain 0.48 g of 5-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-2-fluorobenzonitrile (yield 92.9%).

Provenance & Evidence