Dichloromethane → 1-methyl-6-trifluoromethyl-3-(6-amino4-chloro-2-fluoro-5-hydroxyphenyl)-2,4(1H,3H)-pyrimidinedione

関与物質

反応手順

3-(2-Amino-4-chloro-6-fluoro-3-methoxyphenyl)-1-methyl-6trifluoromethyl-2,4(1H, 3H)-pyrimidinedione (1.1 g, 2.7 mmol) was dissolved in 50 ml of anhydrous 1,2-dichloroethane and 3.4 g (10.8 mmol) of borontribromide imethylsulfide complex was added to the solution. The solution was refluxed for 16 hr and methylene chloride (100 ml) was added. Washing with water followed by drying (anhydrous sodium sulfate) and removal of the solvent afforded a residue which was triturated with ether to afford the title compound (0.6 g).

情報源と証拠