[CH3:1][P:2]([C:7]1[CH:12]=[C:11]([Cl:13])[CH:10]=[CH:9][C:8]=1[N+:14]([O-])=O)(=[O:6])[O:3][CH2:4][CH3:5]>CO.[Pd]>[CH3:1][P:2]([C:7]1[CH:12]=[C:11]([Cl:13])[CH:10]=[CH:9][C:8]=1[NH2:14])(=[O:6])[O:3][CH2:4][CH3:5]Ethyl P-methyl-2-nitro-5-chlorophenylphosphinate (1.7 g, 7.5 mmol) dissolved in methanol (25 ml) is added to 200 mg of 5% palladium on carbon. The mixture is hydrogenated at 32 psi for 1 hour. The catalyst is then filtered off and the filtrate is evaporated to dryness to give ethyl P-methyl-2-amino-5-chlorophenylphosphinate.
Wird geladen…