[ClH:1].C([NH:9][CH2:10][P:11](=[O:16])([O:14][CH3:15])[O:12][CH3:13])C1C=CC=CC=1.C>CO.C1C=CC=CC=1.[Pd]>[ClH:1].[NH2:9][CH2:10][P:11](=[O:16])([O:14][CH3:15])[O:12][CH3:13]Dimethyl N-benzyl-aminomethylphosphonate hydrochloride (80.0 g) in methanol (800 ml) is hydrogenated at 40 psi with 10% palladium on powdered charcoal (4.0 g). The catalyst is removed by filtration through a pad of super cel. Evaporation of the methanolic filtrate gives a clear residue which is taken up in benzene. Removal of the benzene in vacuo affords crystalline dimethyl aminomethylphosphonate hydrochloride.
読み込み中…