Molecular Formula | C18H27NO2 |
Molar Mass | 289.41 |
Boling Point | bp0.07 112-115° |
Physical and Chemical Properties | Chemical liquid. Boiling point 156-158 ℃(0.93kPa),110-115 ℃(6.65 × 10-3kPa). |
Use | Uses the product and ethane two sulfonic acid salt, that is, cough medicine cough, Cough inhibition of the role of the center. For tuberculosis, bronchitis, bronchitis, influenza caused by Cough. |
overview
Caralmefene can inhibit the cough center, is a non-addictive antitussive, has local anesthesia and mild bronchiectasis, but has no analgesic and respiratory depression effects.
production method
It is obtained by esterification of 1-phenylcyclopentane formyl chloride and diethylamino ethanol. Add 1-phenylcyclopentane formyl chloride into a dry reaction pot, stir and cool to 10-15 ℃, add diethylamino ethanol dropwise, gradually increase the internal temperature to 110 ℃, add it within 2.5-3h, stir for 30min, heat to 115-125 ℃, react for 2-2.5h, discharge the material while hot, and leave overnight. Add 5 times the amount of water to dissolve, add 10% hydrochloric acid to pH = 6-7. Filter to remove insoluble matter. After extracting the filtrate with benzene, add activated carbon, decolorize at 70-80 ℃ for 2 hours, and filter. Add sodium carbonate to the filtrate to neutral, precipitate the oil layer, wash to neutral with a saturated solution of sodium sulfate, add anhydrous sodium sulfate to dry, filter, and obtain the base of Kemefen.