Hydrochloric Acid → methyl (S)-3-amino-2-(4-methanesulphonylpiperazin-1-yl)propanoate hydrochloride

Participants

Reaction Conditions

Reaction Steps

15 ml of a solution of hydrochloric acid in isopropanol having a concentration of 5-6N are added dropwise to a solution of 2.7 g (7.4 mmol) of methyl (S)-3-tert-butoxycarbonylamino-2-(4-methanesulphonylpiperazin-1-yl)propanoate in 30 ml of methanol. The reaction medium is stirred at 40° C. for 2 h, concentrated under vacuum then taken up in 20 ml of methanol and 150 ml of diethyl ether. The product precipitates, is filtered, rinsed with diethyl ether then dried under vacuum. 2.3 g (100%) of methyl (S)-3-amino-2-(4-methanesulphonylpiperazin-1-yl)propanoate hydrochloride are obtained in the form of a white solid.

Provenance & Evidence