[S:1]1[CH:5]=[CH:4][N:3]=[C:2]1[NH:6][C:7]([N:9]1C=CN=C1)=[S:8].C([O-])(=O)C.[NH4+]>C(O)C>[S:1]1[CH:5]=[CH:4][N:3]=[C:2]1[NH:6][C:7]([NH2:9])=[S:8]A mixture of 65 g (309.1 mmol) N-1,3-thiazole-2-yl-1H-imidazole-1-carbothioamide and 260 g of ammonium acetate were heated to 80° C. in 400 ml ethanol for 1.5 hours; after completion of reaction the solvent was distilled off and water was added to the obtained residue. After extraction with CH2Cl2 and drying of the organic phase with Na2SO4, 59.6 g of the target product were obtained.
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