C(NC1CCCC2C=CC(OC)=CC=2C1)C1C=CC=CC=1.[C:22]1([N:28](CC2OC2)[C:29]([O:31][CH2:32][C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)=[O:30])[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.C(=O)([O-])O.[Na+]>ClCCl.FC(F)(F)S([O-])(=O)=O.[Yb+3].FC(F)(F)S([O-])(=O)=O.FC(F)(F)S([O-])(=O)=O>[CH2:32]([O:31][C:29]([NH:28][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[O:30])[C:33]1[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=1Under nitrogen, to a solution of N-benzyl-(3-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-yl)amine (300 mg) and 1-[N-phenyl-N-benzyloxycarbonylamino]-2,3-epoxypropane (300 mg) in dichloromethane (5 ml) was added ytterbium(III) trifluoromethanesulfonate (66 mg) at room temperature, and the mixture was stirred at the same temperature for 24 hours. The resulting mixture was poured into saturated aqueous sodium hydrogencarbonate and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated in vacuo. The residue was purified by column chromatography on silica gel (hexane:ethyl acetate=10:1 to 4:1) to give N-[3-[N′-benzyl-N-(3-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-yl)amino]-2-hydroxypropyl[-N-benzyloxycarbonylphenylamine (307 mg).
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