[NH2:1][CH2:2][C:3]1([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH2:8][CH2:7][N:6]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:5][CH2:4]1.C(N(C(C)C)CC)(C)C.[CH3:31][O:32][CH2:33][C:34](Cl)=[O:35].O>ClCCl>[CH3:31][O:32][CH2:33][C:34]([NH:1][CH2:2][C:3]1([C:16]2[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH2:8][CH2:7][N:6]([C:9]([O:11][C:12]([CH3:14])([CH3:15])[CH3:13])=[O:10])[CH2:5][CH2:4]1)=[O:35]3.7 g of commercial tert-butyl 4-aminomethyl-4-phenyl-piperidine-1-carboxylate and 3 ml diisopropylethylamine are placed in 30 ml dichloromethane. Then 2.25 ml methoxyacetyl chloride are slowly added. The reaction mixture is stirred at ambient temperature, until there is no further reaction, then mixed with water. The organic phase is evaporated to dryness. 4.7 g product are obtained as an oil.
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