反应详情

To a stirred mixture of 3-(5-isopropyl-2,6-dimethoxy-pyrimidine-4-carbonyl)-5-methyl-benzaldehyde (2.26 g, 6.89 mmol) and diethyl cyanomethylphosphonate (1.14 ml, 7.03 mmol) in anhydrous THF (15 ml) at 0° C. (ice bath) under nitrogen atmosphere, was added potassium t-butoxide (0.85 g, 7.58 mmol). After stirring for 1 hr., the mixture was further stirred for 4 hr. at room temperature. The reaction mixture was diluted with ether, washed with water, dried with anhydrous magnesium sulfate, filtered, and evaporated in vacuo. The residue was purified by silica gel column chromatography (eluent, EA:hexanes (1:4)) to afford 1.56 g (65%) of a white solid. m.p. 144-145° C.; 1H NMR (300 MHz, CDCl3) δ 1.19 (6H, d, J=6.9 Hz), 2.42 (3H, s), 2.83 (1H, m), 3.94 (3H, s), 4.08 (3H, s), 5.92 (1H, d, J=16.8 Hz), 3.39 (1H, d, J=16.8 Hz), 7.49 (1H, s), 7.69 (1H, s), 7.75 (1H, s).

1. stirring, the mixture was further stirred for 4 hr
2. customat room temperature
3. washwashed with water
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, EA:hexanes (1:4))