[Cl:1][CH2:2][CH2:3][N:4]([CH2:9][CH2:10][Cl:11])[P:5](Cl)(Cl)=[O:6].CN[C:14]([C:18]1[CH:23]=CC=CC=1)([OH:17])CC.C([N:26](CC)CC)C>C(OCC)(=O)C>[CH2:18]1[CH2:14][O:17][P:5]([N:4]([CH2:9][CH2:10][Cl:11])[CH2:3][CH2:2][Cl:1])(=[O:6])[NH:26][CH2:23]1A solution of bis(2-chloroethyl)phosphoramidic dichloride (10 mmol) in ethyl acetate (100 mL) is added dropwise to a solution of commercial 3 methylamino-1-phenyl-1-propanol (10 mmol) and triethylamine (20 mmol) in ethyl acetate (100 mL) at rt. After stirring at rt for 3 days, the salts are filtered off and the combined filtrates are concentrated under vacuum. The crude product is purified by column chromatography on silica.
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