Triethylamine → 3-(2,6-dimethylphenylamino)-2-butanone O-methyloxime

Participants

Reaction Conditions

Reaction Steps

A sample of 50.5 g triethylamine was added dropwise to a solution of 50.1 g (0.6 mol) methoxyamine hydrochloride in 75 ml dichloromethane at 9°-20° C. To the resulting solution was added about one-half of a 95.6-g (0.5-mol) sample of 3-(2,6-dimethylphenylamino)-2-butanone. The reaction temperature rose from 16° C. to 30° C. The reaction mixture was cooled in an ice bath, and the remaining 3-(2,6-dimethylphenylamino)-2-butanone was added dropwise. The reaction mixture was then stirred about 18 hours at about 20° C., washed with 50 ml of water and evaporated under reduced pressure to give 100.3 g of 3-(2,6-dimethylphenylamino)-2-butanone O-methyloxime, as an oil. The nuclear magnetic resonance spectrum showed a sharp 3-proton singlet (--OCH3) at 3.9 ppm (relative to tetramethylsilane) and a sharp 6-proton singlet (2,6-dimethyl groups) at 2.2 ppm.

Provenance & Evidence