Cl.[NH2:2][C:3]([C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)([CH3:6])[CH2:4][OH:5].[CH2:13]([O:20][C:21](ON1C(=O)CCC1=O)=[O:22])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.C(N(CC)CC)C>C1COCC1>[OH:5][CH2:4][C:3]([NH:2][C:21](=[O:22])[O:20][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)[CH3:6]2-Amino-2-phenylpropan-1-ol hydrochloride (0.5 g, 2.7 mmol) was reacted with N-(benzyloxycarbonyloxy)-succinimide (0.73 g, 2.9 mmol) and triethylamine (0.82 mL, 5.9 mmol) in THF (25 mL) at 0° C. for 1.0 hours and then at room temperature for 1 hour. The reaction was concentrated and extracted with ethyl acetate (25 mL). The extract was washed with water (2×) and brine, dried over MgSO4, and concentrated to give the crude title compound and used without further purification.
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