Water → HCID 11726718, compound

Participants

Reaction Steps

First, 60% sodium hydride (0.2 g) was suspended in dimethylformamide (5 ml), and a solution of 7-(2-chloro -4-trifluoromethylphenoxy)-2-methyl-2H-1,4-benzoxazine-3 (4H)-one (0.4 g) prepared in Example 1 in dimethylformamide (5 ml) was dropwise added thereto while cooling with ice, and the mixture was stirred for 10 min. Then methyl iodide (0.7 g) was added thereto and the mixture was stirred for additional 10 min, and thereafter, water (20 ml) was added thereto to terminate the reaction. The reaction mixture was extracted with ethyl acetate (50 ml×2), washed with water and a saturated saline solution, and then dried over anhydrous magnesium sulfate. The solvent was distilled off in vacuo, and the residue was purified by silica gel column chromatography (developing solvent: n-hexane/ethyl acetate=3/1) to prepare the title compound (0.4 g) as a colorless crystal (yield: 98%).

Provenance & Evidence