C(O[C:4](=[O:19])[CH2:5][C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[O:14][CH2:15][CH2:16][O:17][CH3:18])=O)C.Cl.[C:21]([NH2:24])(=[NH:23])[CH3:22].C(O[K])(C)(C)C.Cl>C(O)C.O>[CH3:18][O:17][CH2:16][CH2:15][O:14][C:9]1[CH:10]=[CH:11][CH:12]=[CH:13][C:8]=1[C:6]1[N:23]=[C:21]([CH3:22])[NH:24][C:4](=[O:19])[CH:5]=1To a solution of 3-[2-(2-methoxy-ethoxy)-phenyl]-3-oxo-propionic acid ethyl ester (0.26 g, 0.98 mmol) in absolute ethanol (10 mL) was added acetamidine hydrochloride (0.3 g, 3.19 mmol) and tBuOK (0.5 g, 4.46 mmol). The reaction mixture refluxed 12 h. After cooling, a mixture poured into water (10 mL), adjusted to pH 3 with 10% HCl and extracted with CHCl3 (3×20 mL). Organic layers were combined, washed with water (10 mL), then dried over anhydrous sodium sulfate, concentrated and triturated with hexane to obtained 0.17 g (67%) 6-[2-(2-methoxy-ethoxy)-phenyl]-2-methyl-3H-pyrimidin-4-one as a white powder.
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