反应详情

A solution of 3-(2-amino-4-chlorophenyl)-1-methyl-6-trifluoromethyl-2,4(1H, 3H)-pyrimidinedione (0.4 g), 2-naphthoyl chloride (0.29 g) and triethyl amine (0.19 g) in anhydrous tetrahydro furan (30 ml) was heated at reflux temperature overnight under nitrogen atmosphere. The reaction mixture was diluted with ethyl acetate (200 ml), washed with brine (×2) and dried over anhydrous sodium sulfate. The solvent was removed unded reduced pressure and the residue was purified by column chromatography on silica gel using ethyl acetate and hexane (1:3) as the eluent give a pale yellow solid. The solid was recrystallized from ethyl acetate-hexane to give the title compound as a white crystal (0.42 g).

1. temperatureat reflux temperature overnight under nitrogen atmosphere
2. washwashed with brine (×2)
3. dry with materialdried over anhydrous sodium sulfate
4. customThe solvent was removed unded reduced pressure
5. customthe residue was purified by column chromatography on silica gel
6. customgive a pale yellow solid
7. customThe solid was recrystallized from ethyl acetate-hexane