反应详情

温度

5 °C

1-(4′-Fluorophenyl)-1,3-dihydroisobenzofuran-5-ylmethanol (20.6 g) was dissolved in ethyl acetate (160 ml) and to the obtained solution were added sodium hydrogencarbonate (2.9 g), tetrabutylammonium bromide (1.6 g) and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinoxy (0.13 g). The mixture was cooled to 5° C. Thereto was added dropwise 12.9% aqueous sodium hypochlorite solution (52.7 g) at 5-10° C. and the mixture was stirred for 1 hr. Water (100 ml) was added to the reaction mixture and the mixture was extracted twice with ethyl acetate (100 ml). The extract was washed with 5% aqueous sodium hydrogencarbonate solution and saturated brine, and silica gel (3 g) was added. The mixture was filtered and the solvent was evaporated to give 1-(4′-fluorophenyl)-1,3-dihydroisobenzofuran-5-carbaldehyde (17.2 g, 84.2%).

1. extractionthe mixture was extracted twice with ethyl acetate (100 ml)
2. washThe extract was washed with 5% aqueous sodium hydrogencarbonate solution and saturated brine, and silica gel (3 g)
3. additionwas added
4. filtrationThe mixture was filtered
5. customthe solvent was evaporated