反应详情

To a solution of 200 mg (0.59 mmol) of 3-[4-chloro-2-fluoro-5-(hydroxy)phenyl]-1-methyl-6- (trifluoromethyl)-2,4 (1H,3H) -pyrimidinedione in 3 mL of acetonitrile was added 162 mg of potassium carbonate (1.18 mmol) and 131 mL (1.18 mmol) of an 80% solution of propargyl bromide in toluene. It was warmed under reflux for 2 h. The resulting mixture was filtered and the filtrate was concentrated in vacuo to give colorless oil which was flash chromatographed over silica gel, eluting with a 1:4 v:v mixture of ethyl acetate and hexane to give 204 mg of title compound as a white foam: 1H-NMR (CDCl3, 200 MHz) ppm 7.35 (d, 1H), 7.0 (d, 1H), 6.4 (s, 1H), 4.78 (d, 2H), 3.58 (s, 3H), 2.6 (d, 1H).

1. temperatureIt was warmed
2. temperatureunder reflux for 2 h
3. filtrationThe resulting mixture was filtered
4. concentrationthe filtrate was concentrated in vacuo
5. customto give colorless oil which
6. customchromatographed over silica gel
7. washeluting with a 1:4 v
8. additionv mixture of ethyl acetate and hexane