C(OC(=O)[NH:7][C@H:8]1[CH2:13][CH2:12][C@H:11]([C:14]([N:16]2[CH2:21][CH2:20][N:19]([CH:22]([CH3:24])[CH3:23])[CH2:18][CH2:17]2)=[O:15])[CH2:10][CH2:9]1)(C)(C)C.[ClH:26]>O1CCOCC1>[ClH:26].[ClH:26].[NH2:7][C@H:8]1[CH2:13][CH2:12][C@H:11]([C:14]([N:16]2[CH2:17][CH2:18][N:19]([CH:22]([CH3:24])[CH3:23])[CH2:20][CH2:21]2)=[O:15])[CH2:10][CH2:9]1A mixture of 4.56 g (12 mmol) [trans-4-(4-isopropyl-piperazine-1-carbonyl)-cyclohexyl]-carbamic acid tert-butyl ester and 29 mL 4N HCl in dioxane was stirred for 6 h at 50° C. evaporated to dryness and used without further purification in the subsequent step. MS (m/e): 254.1 (MH+).
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