02 mol (5.0 g) of diethyl 2-benzylmalonate (2a), 15 mL of 16.7 % solution of sodium methoxide and 60 mL of methanol were heated in a round-bottom flask equipped with a condenser and mechanic mixer in boiling for 8 h. The reaction mixture was then cooled down, see more and the solvent was distilled off. The resulted solid was dissolved in 100 mL of water, and 10 % solution of hydrochloric acid was added till acidic

reaction. The obtained precipitation was filtered out, washed with water, and purified by crystallization from methanol. It was obtained 3.64 g of 3e (47 % yield), white crystalline solid, m.p. 268–270 °C; 1H NMR (DMSO-d 6, 300 MHz,): δ = 10.83 (s, 1H, OH), 7.09–7.89 (m, 7H, CHarom), 4.05 (dd, 2H, J = 9.0, J′ = 7.3 Hz, H2-2), 4.18 (dd,

2H, J = 9.0, J′ = 7.3 Hz, H2-2), 3.28 (s, 2H, CH2benzyl); 13C NMR (DMSO-d 6, 75 MHz,): δ = 41.3 (CBz), 41.3 (C-2), 42.7 (C-3), 91.2 (C-6), 117.2, 118.5, 120.5, 125.8, 128.4, 128.7, 129.0, 130.8, 130.8, 153.3 (C-7), 162.3 (C-8a), 167.5 (C-5),; EIMS m/z 388.1 [M+H]+. HREIMS (m/z): 387.0958 [M+] (calcd. for C19H14Cl2N3O2 387.2590); Anal. calcd. for C19H14Cl2N3O2:C, 58.29; H, 3.64; Cl 18.31; N, 10.85. Found C, 58.40; H, 3.72; Cl, 18.28; N, 10.80. 6-Benzyl-1-(2,6-dichlorphenyl)-7-hydroxy-2,3-dihydroimidazo[1,2-a]pyrimidine-5(1H)-one (3f) 0.02 (6.18 g) mol of hydrobromide of 1-(2,6-dichlorphenyl)-4,5-dihydro-1H-imidazol-2-amine (1f), 0.02 (5.0 g) mol of diethyl 2-benzylmalonate (2a), 15 mL of 16.7 % solution of sodium methoxide and 60 mL INK 128 manufacturer of methanol were heated in a round-bottom flask equipped with a condenser and mechanic mixer in boiling for 8 h. The reaction mixture was then cooled down, and the solvent was distilled off. The resulted solid was dissolved in 100 mL of water, and 10 % solution of hydrochloric acid was added till acidic reaction. The obtained precipitation was filtered out, washed with water, and

purified by crystallization from methanol. It was obtained 3.40 g of 3f (44 % yield), white crystalline however solid, m.p. 274–275 °C; 1H NMR (DMSO-d 6, 300 MHz,): δ = 11.03 (s, 1H, OH), 7.29–7.99 (m, 7H, CHarom), 4.01 (dd, 2H, J = 9.1, J′ = 7.6 Hz, H2-2), 4.21 (dd, 2H, J = 9.1, J′ = 7.6 Hz, H2-2), 3.38 (s, 2H, CH2benzyl); 13C NMR (DMSO-d 6, 75 MHz,): δ = 24.1 (CBz), 40.2 (C-2), 42.6 (C-3), 94.2 (C-6), 117.9, 118.2, 119.6, 119.7, 122.4, 123.0, 123.9, 130.1, 130.3, 133.3, 133.3; 152.5 (C-7), 162.6 (C-8a), 166.8 (C-5),; EIMS m/z 388.1 [M+H]+. HREIMS (m/z): 387.1462 [M+] (calcd. for C19H14Cl2N3O2 387.2590); Anal.