Triethylamine → 1-(Phenoxy)methyl-4,6-dimethyl-5-bromopyrimidin-2-one

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A mixture of 4,6-dimethyl-5-bromopyrimidin-2-one (4.7 mmol) and triethylamine (4.7 mmol) in dichloromethane (60 ml) was heated at 40° C. for dissolution. The solution was then cooled to room temperature and (chloromethoxy)benzene [see Preparation 2] (4.7 mmol) in dichloromethane (15 ml) was added. The resultant mixture was stirred at room temperature for 11/2 h, the solvent distilled off, the mixture triturated with water, the remaining solid extracted with chloroform, the dried (MgSO4) chloroform solution evaporated, the residue triturated with a little ether, the residue redissolved in chloroform and the solution chromatographed on a column of alumina, activity III, using chloroform, Yield 0.35 g (24%), m.p. 120° C. (CCl4). (Found C50.32; H4.15. Calc. for C13H13BrN2O2 : C50.50; H4.25) 1H NMR (CDCl3): δ 2.50 and 2.68 (4-Me and 6-Me), 6.03 (CH2), 6.8- 7.4 (Ph), MS [70 eV, m/z (% rel. int)]. 310/308 (6/7,M), 217(97), 215(100), 174(15), 172(12), 136(20), 135(19), 108(23) 94(19).

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