反应详情

2.0 g of 3,4,5-trimethoxy-benzoic acid, 1.8 g. of cyclohexylamino-ethanol-hydrochloride and 4.0 g. of p-toluene-sulphonic acid are refluxed in 40 ml. of benzene for 12 hours. After cooling the reaction mixture is extracted with a 15% sodium carbonate solution and 10% hydrochloric acid. White crystals precipitate from the hydrochloric acid solution. Thus N-2-ethyl-cyclohexylamino-3,4,5-trimethoxy-benzoate-hydrochloride is obtained. Mp.: 207°-208° C.

1. temperatureAfter cooling the reaction mixture
2. extractionis extracted with a 15% sodium carbonate solution and 10% hydrochloric acid
3. customWhite crystals precipitate from the hydrochloric acid solution