Ethyl bromopyruvate → Ethyl 5-oxo-5,6-dihydroimidazo[1,2-c]pyrimidine-2-carboxylate
Reaktionsgleichung
Br[CH2:2][C:3](=O)[C:4]([O:6][CH2:7][CH3:8])=[O:5].[NH:10]1[CH:17]=[CH:16][C:14]([NH2:15])=[N:13][C:11]1=[O:12]>C(O)C>[O:12]=[C:11]1[N:13]2[CH:2]=[C:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])[N:15]=[C:14]2[CH:16]=[CH:17][NH:10]1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
Ethyl bromopyruvate (18.00 mmol, 3.51 g) was dissolved in ethanol (50 ml). Cytosine (18.00 mmol, 2 g) was added and the resulting mixture was refluxed for 5.5 h. The mixture was evaporated and DCM was added. The precipitate was filtered and washed with water. The filtrate was washed with NaHCO3, water and evaporated. The evaporation residue and the previously filtered precipitate were purified by flash chromatography and trituration from water, respectively. 0.526 g of the title compound was obtained. 1H-NMR (400 MHz, DMSO-d6): δ 1.31 (t, 3H), 4.29 (q, 2H), 6.60 (d, 1H), 7.30-7.38 (m, 1H), 8.22 (s, 1H), 11.77 (bs, 1H).