反应详情

To a stirred solution of (3-dimethoxymethyl-5-methyl-phenyl)-(5-isopropyl-2,6-dimethoxy-pyrimidin-4-yl)-methanone (3.13 g, 8.36 mmol) in chloroform (30 ml) at room temperature, was added hydrogen chloride in methanol solution [prepared from methanol (30 ml) and acetyl chloride (4 ml)]. After stirring for 2 hr., the mixture was evaporated in vacuo. The residue was dissolved in ether, washed with aqueous saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and evaporated in vacuo. The residue was purified by silica gel column chromatography (eluent, i) MC, ii) MC:EA (9:1)) to afford 2.3 g (84%) of a white solid. m.p. 111-113° C.; 1H NMR (300 MHz, CDCl3) δ 1.20 (6H, d, J=7.2 Hz), 2.50 (3H, s), 2.85 (1H, m), 3.93 (3H, s), 4.08 (3H, s), 7.94 (1H, s), 7.99 (1H, s), 8.08 (1H, s), 10.02 (1H, s).

1. custom, the mixture was evaporated in vacuo
2. dissolutionThe residue was dissolved in ether
3. washwashed with aqueous saturated sodium bicarbonate solution
4. dry with materialdried with anhydrous magnesium sulfate
5. filtrationfiltered
6. customevaporated in vacuo
7. customThe residue was purified by silica gel column chromatography (eluent, i) MC, ii) MC