反应详情

To methyl 7-hydroxy-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (0.40 g) dissolved in methylene chloride (15 ml) was added 4-(2-propoxyethoxy)phenylboric acid (0.67 g) and molecular sieves 4A (0.8 g), and the resulting mixture was stirred for 5 minutes. To the reaction mixture were added cupric acetate (0.27 g) and triethylamine (1.04 ml), and the resulting mixture was stirred at room temperature for 5 hours. The reaction mixture was filtered through celite, and the filtrate was washed with ethyl acetate. The resulting solution was evaporated under reduced pressure to remove the solvent, and the residue was purified by silica gel column chromatography (hexane/ethyl acetate=3/2) to obtain methyl 7-[4-(2-propoxyethoxy)phenoxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (0.23 g).

1. stirringthe resulting mixture was stirred at room temperature for 5 hours
2. filtrationThe reaction mixture was filtered through celite
3. washthe filtrate was washed with ethyl acetate
4. customThe resulting solution was evaporated under reduced pressure
5. customto remove the solvent
6. customthe residue was purified by silica gel column chromatography (hexane/ethyl acetate=3/2)