[C:1]([N:20]1[CH2:25][CH2:24][CH:23]([C:26]([OH:28])=O)[CH2:22][CH2:21]1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[CH3:30][O:31][NH:32][CH3:33].C(N(CC)CC)C.CCN=C=NCCCN(C)C>ClCCl>[CH3:33][N:32]([O:31][CH3:30])[C:26]([CH:23]1[CH2:22][CH2:21][N:20]([C:1]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=2)[CH2:25][CH2:24]1)=[O:28]To a mixture of 1-tritylpiperidine-4-carboxylic acid (7.0 g), O,N-dimethylhydroxylamine hydrochloride (2.0 g) and triethylamine (2.9 ml) in dichloromethane (70 ml) was added WSC (3.97 g), and the mixture was stirred at room temperature for 1 hour and concentrated. To the residue was added ethyl acetate, and the mixture was washed with water, dried (MgSO4) and concentrated. The resulting crystals (6.3 g) were washed with isopropylether.
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