反应详情

温度

50 °C

In a 125 mL round-bottom flask, 1-(5-bromo-3-phenoxypyridin-2-yl)thiourea (0.50 g, 1.54 mmol) (prepared as described in Example 10, Steps A-D) and methyl 5-bromo-2-methoxy-2-methyl-4-oxopentanoate (0.586 g, 2.31 mmol) were dissolved in dry THF (25 mL), heated to 50° C. and agitated overnight. The solvent was evaporated and the residue was dissolved in chloroform and washed with diluted sodium bicarbonate solution twice, dried over magnesium sulfate, filtered and evaporated. The resulting solid was purified by chromatography on silica gel, eluted with 10-15% ethyl acetate/hexane to give the title compound (0.485 g, 65.7% yield) as yellow solid. 1H NMR (CDCl3) δ 1.46 (s, 3H), 3.12 (s, 2H), 3.34 (s, 3H), 3.73 (s, 3H), 6.58 (s, 1H), 7.06-7.45 (m, 6H), 8.11 (s, 1H), 8.64 (bs, 1H).

1. customThe solvent was evaporated
2. dissolutionthe residue was dissolved in chloroform
3. washwashed with diluted sodium bicarbonate solution twice
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. customevaporated
7. customThe resulting solid was purified by chromatography on silica gel
8. washeluted with 10-15% ethyl acetate/hexane