Sulfuric Acid → 3-Chloro-4-(trifluoromethyl)phenol

関与物質

反応手順

To a sulfuric acid (14 ml) —H2O (14 ml) solution of 3-chloro-4-(trifluoromethyl)aniline (1.96 g, 10 mmol) was added a H2O (10 mL) solution of sodium nitrite (828 mg,12 mmol) at 0 ° C. The reaction mixture was stirred at ambient temperature for 1 hour. The mixture was poured into 10 M sulfuric acid (50 mL). The stirred mixture was refluxed at 110 ° C. for 2 hours. The reaction mixture was then quenched with saturated aqueous solution of sodium bicarbonate and then crude products were extracted with ethyl acetate The organic layer was then washed with brine, dried over sodium sulfate. After the filtration to separate solvent and sodium sulfate, the solvent was removed under reduced pressure to give the residue, which was applied to a silica gel chromatography column and eluted with a ethyl acetate/hexane=⅓ to furnish 945 mg (48% yield) of the title compound as a brown oil.

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