C([NH:4][CH2:5][CH:6]([N:8]1[C:12]([SH:13])=[N:11][N:10]=[N:9]1)[CH3:7])(=O)C.[ClH:14]>>[ClH:14].[NH2:4][CH2:5][CH:6]([N:8]1[C:12]([SH:13])=[N:11][N:10]=[N:9]1)[CH3:7]A mixture of 1-[1-(acetamidomethyl)ethyl]-1H-tetrazole-5-thiol (23 g) and 6 N aqueous hydrochloric acid (300 ml) was refluxed for 2 hours under stirring and evaporated to dryness. The residue was triturated with diethyl ether to give 1-[1-(aminomethyl)ethyl]-1H-tetrazole-5-thiol hydrochloride (19 g), mp 208° to 210° C.
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