反应详情

A solution of 1-(ethyloxy)-3-[(4-nitrophenyl)oxy]benzene (Intermediate 3, 4 g) and tin chloride monohydrate (28.8 g, 139 mmol) in ethyl acetate (200 mL) was heated at reflux overnight (15 hours). The reaction mixture was cooled down. It was then diluted with ethyl acetate (50 mL), washed with saturated NaHCO3 (100 mL), brine (100 mL) and dried over sodium sulphate. After evaporation of the volatiles, the residue was purified by an SCX (wash of the column with methanol, adsorption of the compound, wash with methanol (3CV), desorption with 2N methanolic ammonia (3CV)). Evaporation afforded the title compound (2.9 g).

1. temperatureat reflux overnight (15 hours)
2. temperatureThe reaction mixture was cooled down
3. washwashed with saturated NaHCO3 (100 mL), brine (100 mL)
4. dry with materialdried over sodium sulphate
5. customAfter evaporation of the volatiles
6. customthe residue was purified by an SCX (
7. washwash of the column with methanol, adsorption of the compound
8. washwash with methanol (3CV), desorption with 2N methanolic ammonia (3CV))
9. customEvaporation