反应详情

Sodium nitrite (14.0 g, 0.2 mol) was added to a solution of the dibromide 2 (17.25 g, 0.05 mol) and phloroglucinol dihydrate (16.2 g, 0.1 mol) in DMSO (100 mL) and stirred for 8 h. The reaction mixture was poured into water and extracted with ethyl acetate (3×150 mL). The ethyl acetate solution was washed with water (2×100 mL) sodium chloride solution (2×100 mL), and dried (Na2SO4). Evaporation of ethyl acetate gave an oil, which was purified by silica gel chromatography, (hexane/ethyl acetate, 7/3). Fractions (Rf=0.73 were collected and evaporated to give 3 as a foamy solid. Yield: 2.8 g (22%).

1. extractionextracted with ethyl acetate (3×150 mL)
2. washThe ethyl acetate solution was washed with water (2×100 mL) sodium chloride solution (2×100 mL)
3. dry with materialdried (Na2SO4)
4. customEvaporation of ethyl acetate
5. customgave an oil, which
6. customwas purified by silica gel chromatography, (hexane/ethyl acetate, 7/3)
7. customFractions (Rf=0.73 were collected
8. customevaporated