[CH3:1][NH:2][C:3]1[CH:8]=[CH:7][C:6]([O:9][C:10]2[CH:15]=[CH:14][C:13]([N+:16]([O-])=O)=[CH:12][CH:11]=2)=[CH:5][C:4]=1[N+:19]([O-])=O.[CH3:22][O:23][C:24]([NH:26][C:27](=NC(OC)=O)SC)=[O:25]>CO.[Pd]>[CH3:1][N:2]1[C:3]2[CH:8]=[CH:7][C:6]([O:9][C:10]3[CH:15]=[CH:14][C:13]([NH2:16])=[CH:12][CH:11]=3)=[CH:5][C:4]=2[N:19]=[C:27]1[NH:26][C:24](=[O:25])[O:23][CH3:22]To a mixture of N-methyl-4-(4-nitrophenoxy)-2-nitroaniline (Intermediate 8B -2.10 g, 2.27 mmol) in MeOH (100 mL) was added 5% Pd—C (catalytic amount) and stirred at room temperature under H2 atmosphere. After 7 hrs, the catalyst was removed by filtration then the solvent was evaporated off. The residual mixture was dissolved into MeOH (50 mL) and added 1,3-bis(methoxycarbonyl)-2-methyl-2-thiopseudourea (3.0 g, 14.5 mmol). The mixture was refluxed overnight. The solvent was removed by evaporation and sequence purification on SiO2 column chromatography gave title compound (87.3 mg, 4%): MS m/e 313 (M+1).
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