反应详情

温度

70 °C

To a solution of 2-chloro-4-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-benzaldehyde (i.e. the product of Step 2, 1.20 g) in methanol (5 mL) was added hydroxylamine hydrochloride (296 mg) and a catalytic amount of concentrated hydrochloric acid. The mixture was stirred at 70° C. for 3 h and concentrated in vacuum. Water was added and the mixture was extracted with ethyl acetate. Combined organic layers were dried (Na2SO4) and evaporated to obtain the title compound (1.2 g, 97%).

1. concentrationconcentrated in vacuum
2. additionWater was added
3. extractionthe mixture was extracted with ethyl acetate
4. dry with materialCombined organic layers were dried (Na2SO4)
5. customevaporated