Triethylamine → Methyl 7-[4-(2-propoxyethoxy)phenoxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate

関与物質

反応手順

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).

情報源と証拠