反应详情

A mixed solution of 2-chloro-5-(3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1(2H)-pyrimidinyl)-4-fluoro-benzoic acid, 2-[1-(1,1-dimethylethyl)-2,2-dimethylpropylidene]hydrazide (0.48 g), excess of methyl iodide and potassium carbonate (0.132 g) in acetonitrile (20 ml) was heated at reflux temperature overnight. The mixture was allowed to cool to ambient temperature and partitioned between ethyl acetate and brine. The organic phase was washed with brine (×3) and dried over anhydrous Na2SO4. The solvent was removed under reduced pressure and the residue was purified by column chromatography on silica gel eluted with a mixed solvent of ethyl acetate and hexane (1:4 to 1:2) to give the titled compound (0.25 g) along with its, 2-chloro-5-(3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1(2H)-pyrimidinyl)-4-fluoro-benzoic acid, 2-[1-(1,1-dimethylethyl)-2,2-dimethylpropylidene]-1-methylhydrazide (0.1 g, Compound No. 6-8)

1. temperatureat reflux temperature overnight
2. custompartitioned between ethyl acetate and brine
3. washThe organic phase was washed with brine (×3)
4. dry with materialdried over anhydrous Na2SO4
5. customThe solvent was removed under reduced pressure
6. customthe residue was purified by column chromatography on silica gel
7. washeluted with a mixed solvent of ethyl acetate and hexane (1:4 to 1:2)