反应详情

The title compound was prepared in a manner similar to that described in Example 6 by adding a solution of α-chloroethoxybenzene [see Preparation 8] (4.5 mmol) in dichloromethane (5 ml) to a solution from 5-chloropyrimidin-2-one hydrochloride (4.5 mmol) in dichloromethane (15 ml) at 5° C., and the mixture was stirred at room temperature for 2 h before being worked up. The product was a mixture of the desired N-isomer and the O-isomer in the ratio 3:2; yield 0.85 g (76%). The isomers were separated by chromatography on silica gel using chloroform as above; m.p. 92° C. (CH2Cl2 /Pet.ether). (Found: C58.02; H 4.51 Calc. for C12H11ClN2O2 : C57.49; H4.43) 1H NMR (CDCl3): δ 1.72 (Me, d, J 5Hz), 6.4-7.3 (Ph,H-α), 7.79 and 8.40 (H-4 and H-6, respectively, J 3 Hz). IR (KBr): 1665 cm-1 (CO). MS [70 eV, m/z (% rel. int.)]: 250 (l,M), 159 (30)), 157 (100), 121 (23), 77 (30), 65 (17).

1. additiona mixture of the desired N-isomer
2. customThe isomers were separated by chromatography on silica gel