反应详情

温度

40 °C

15 ml of a solution of hydrochloric acid in isopropanol having a concentration of 5-6N are added dropwise to a solution of 3.8 g (10.4 mmol) of methyl (R)-3-tert-butoxycarbonylamino-2-(4-methanesulphonylpiperazin-1-yl)propanoate in 50 ml of methanol. The reaction medium is stirred at 40° C. for 3 h, concentrated under vacuum then taken up in diethyl ether. The product precipitates, is filtered, rinsed with diethyl ether then dried under vacuum. 3 g (97%) of methyl (R)-3-amino-2-(4-methanesulphonylpiperazin-1-yl)propanoate hydrochloride are obtained in the form of a beige solid.

1. concentrationconcentrated under vacuum
2. customThe product precipitates
3. filtrationis filtered
4. washrinsed with diethyl ether
5. customthen dried under vacuum