反应详情

A solution of sodium nitrite (97 mg) in water (2.0 mL) was added dropwise to an ice-cold suspension of 4-bromo-2,6-dimethoxyaniline (232 mg) in 6.0 M hydrochloric acid (2.5 mL). After stirring in ice for 30 minutes, a solution of cupric chloride (495 mg) in concentrated hydrochloric acid (2.0 mL) was added. The reaction mixture was stirred at room temperature for 30 minutes, then at 100° C. for 2 hours, and extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium hydrogencarbonate and water, dried over anhydrous sodium sulfate, and evaporated. The residue was subjected to a column of silica gel using hexane-ethyl acetate (10:1) as an eluent to give the title compound as white powder.

1. stirringThe reaction mixture was stirred at room temperature for 30 minutes
2. waitat 100° C. for 2 hours
3. extractionextracted with ethyl acetate
4. washThe organic layer was washed with a saturated aqueous sodium hydrogencarbonate and water
5. dry with materialdried over anhydrous sodium sulfate
6. customevaporated