反应详情

5.2 g (0.022 mol) of (4-amino-3-chloro-5-trifluoromethyl-phenyl)-ethylene oxide was dissolved in 26 ml of anhydrous ethanol and treated with 5.1 ml (0.049 mol) of tert-butylamine. The mixture was refluxed for 13 h, and then evaporated. The residue was extracted with 2N hydrochloric acid for several times. Aqueous layers were combined and extracted with toluene and treated with activated carbon. The pH was adjusted to 10 with 20% sodium hydroxide solution. The precipitate was collected by filtration, 2-(4-amino-3-chloro-5-trifluoromethylphenyl)-2-tert-butylaminoethanol was obtained. Yield 20–30%; melting point 85–90° C.

1. temperatureThe mixture was refluxed for 13 h
2. customevaporated
3. extractionThe residue was extracted with 2N hydrochloric acid for several times
4. extractionextracted with toluene
5. additiontreated with activated carbon
6. filtrationThe precipitate was collected by filtration