[CH3:1][S:2][C:3]1[N:8]=[C:7]([O:9][C:10]2[CH:15]=[CH:14][C:13]([N+:16]([O-])=O)=[C:12]([Cl:19])[CH:11]=2)[CH:6]=[CH:5][N:4]=1.C(O)C.[H][H]>[Pd].[O-]S([O-])(=O)=O.[Ba+2].C1COCC1>[Cl:19][C:12]1[CH:11]=[C:10]([O:9][C:7]2[CH:6]=[CH:5][N:4]=[C:3]([S:2][CH3:1])[N:8]=2)[CH:15]=[CH:14][C:13]=1[NH2:16]A mixture of 1.10 g (3.69 mmol) 2-methylsulfanyl-4-(3-chloro-4-nitrophenoxy)-pyrimidine, 20 ml ethanol, 20 ml THF, and 300 mg palladium/BaSO4 is hydrogenated at 50 mbar hydrogen pressure at r.t. for 8 h. The catalyst was removed by filtration, washed with 20 ml ethanol and evaporated. The residue was purified by chromatography on silica (ethyl acetate/isohexane 2:7) to give 320 mg (32%) 2-chloro-4-(2-methylsulfanyl-pyrimidin-4-yloxy)-phenylamine.
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