NC1C=CC(SC(=O)N)=CC=1[N+]([O-])=O.[C:15]([S:18][C:19]1[CH:24]=[CH:23][C:22]([NH:25][C:26]([NH:28][C:29]([O:31][CH3:32])=[O:30])=[S:27])=[C:21]([N+:33]([O-])=O)[CH:20]=1)(=[O:17])[NH2:16].NC1C=CC(SC(=O)N)=CC=1N.[CH3:48][O:49][C:50]([N:52]=[C:53]=[S:54])=[O:51]>[Fe].CC(C)=O>[C:15]([S:18][C:19]1[CH:24]=[CH:23][C:22]([NH:25][C:26]([NH:28][C:29]([O:31][CH3:32])=[O:30])=[S:27])=[C:21]([NH:33][C:53]([NH:52][C:50]([O:49][CH3:48])=[O:51])=[S:54])[CH:20]=1)(=[O:17])[NH2:16]In a similar manner, substituting 1-amino-4-carbamoylthio-2-nitrobenzene for the 4-carbamoylthio-1-(3-methoxycarbonyl-2-thioureido)-2-nitrobenzene in the iron reduction step, 1,2-diamino-4-carbamoylthiobenzene is prepared. 0.5 G. of this latter compound in 30 ml. acetone is treated overnight with 2 g. methoxy carbonyl isothiocyanate at room temperature. The solution is concentrated and the residue triturated with ether. Recrystallization yields 4-carbamoylthio-1,2-bis-(3-methoxycarbonyl-2-thioureido)-benzene.
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