Iodine → 1-Ethyl-2-iodo-4-(trifluoromethyl)benzene

関与物質

反応手順

Sulfuric acid (96%, 1.9 mL) was added drop wise to a solution of sodium periodate (3.73 g, 17.4 mmol) and iodine (2.95 g, 11.6 mmol) in a mixture acetic acid (8.45 mL) acetic anhydride (4.23 mL) at 0° C., followed by the drop wise addition of 1-ethyl-4-(trifluoromethyl)benzene (2.0 g, 11.6 mmol). The reaction mixture was let warming up to room temperature while stirring for a period of 24 h. A solution of sodium metabisulfite (10%) was added to quench the remaining iodine and successively, sodium hydroxide (35%) was added to reach pH=7. The aqueous layer was extracted with DCM (3×50 mL) and the combined organic layers were dried over sodium sulfate. Once the solvent was removed, the crude was used without further purification in the next step.

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