Hydrochloric Acid → Piperazine-1-carboxamide Hydrochloride

Reaction equation

[N:1]1([C:7]([NH2:9])=[O:8])[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.[ClH:10]>C(OCC)(=O)C>[ClH:10].[N:1]1([C:7]([NH2:9])=[O:8])[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1

Participants

Procedure

0.01 g of 1-[3(S)-[[N-(benzyloxycarbonyl)-L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-4-(tert.butoxycarbonyl)-N-tert.butyl-2(R or S)-piperazinecarboxamide (isomer B) was treated with hydrogen chloride in ethyl acetate as described in Example 97 to give 0.007 g of 1-[3(S)-[[N-(benzyloxycarbonyl)-L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-N-tert.butyl-2(R or S)-piperazinecarboxamide hydrochloride as a very hygroscopic solid; MS: m/e 597 [M+H]+.