Triethylamine → 3-[4-chloro-2-(2,4-difluorobenzoyl)amino-6-fluoro-3-methoxyphenyl]-1-methyl-6-trifluoromethyl-2,4(1H, 3H)-pyrimidinedione

関与物質

反応手順

3-(2-Amino-4-chloro-6-fluoro-3-methoxyphenyl)-1-methyl-6-trifluoromethyl-2,4(1H, 3H)-pyrimidinedione (2.0 g, 5.4 mmol) and triethylamine (0.66 g, 6.5 mmol) were dissolved in anhydrous tetrahydrofuran (30 ml) and stirred under ice cooling. To this solution was slowly added 2,4-difluorobenzoyl chloride (0.96 g, 5.4 mmol) and solution refluxed for 2 hr. Another batch of 2,4-difluorobenzoyl chloride (0.19 g, 1.1 mmol) was added and solution refluxed for 2 hr. Solvent was removed in vacuo and the product purified by column chromatography on silica gel using hexane-ethyl acetate (3:1) as the eluent to afford the title compound (2.2 g).

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