[C:1]([NH:9][C:10](=[CH:15][N:16]([CH3:18])C)[C:11]([O:13][CH3:14])=[O:12])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.NC1[S:21][CH:22]=[CH:23][N:24]=1.Cl.O>C(O)(C)C>[C:1]([NH:9][C:10](=[CH:15][NH:16][C:18]1[S:21][CH:22]=[CH:23][N:24]=1)[C:11]([O:13][CH3:14])=[O:12])(=[O:8])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=110g (39.5 mmol) of methyl 2-benzoylamino-3-dimethylaminoacrylate and 11.3 g (118 mmol) of 2-aminothiazole were dissolved at 40° C. in 200 ml of isopropanol. The solution was admixed with 3.96 ml (48 mmol) of concentrated hydrochloric acid within 5 minutes (min) and stirred for a further 60 min. 75 ml of deionized water were added, the suspension was cooled overnight and the crystallized product was filtered off. Yield: 8.6 g (70% of theory) 1H NMR: 3.62 (s, 3H); 7.08 (d, 1H); 7.32 (d, 1H); 7.45-7.60 (m, 3H); 8.02 (d, 2H); 8.22 (d, 1 H); 9.28 (s, 1 H); 10.45 (d, 1 H)
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