[CH2:1]([C:8]1[S:12][C:11]([CH:13]2[CH2:18][CH2:17][N:16](C(OC(C)(C)C)=O)[CH2:15][CH2:14]2)=[N:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[ClH:26]>CO>[ClH:26].[CH2:1]([C:8]1[S:12][C:11]([CH:13]2[CH2:18][CH2:17][NH:16][CH2:15][CH2:14]2)=[N:10][CH:9]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1To 37 mg of 4-(5-benzyl-thiazol-2-yl)-1-t-butyloxycarbonyl-piperidine (from Step B) was added 4 ml of a saturated solution of hydrochloric acid in methanol. The reaction was stirred for 3.5 hours at room temperature. The methanol was evaporated under reduced pressure to give 24 mg of the title compound. ESI-MS 259 (M+H); HPLC A: 2.00 min.
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