Methanol → Methyl 5-hydroxy-4-methoxy-2-nitrobenzoate

関与物質

反応条件

反応手順

To a suspension of 5-hydroxy-4-methoxy-2-nitrobenzoic acid (8.0 g, 37.5 mmol) in methanol was added concentrated sulfuric acid (3 drops) and it was heated at 80° C. overnight. After solvent was removed under reduced pressure, to it was added water and EtOAc. The organic layer was washed with saturated NaHCO3 solution, dried over MgSO4, and concentrated under reduced pressure to afford methyl 5-hydroxy-4-methoxy-2-nitrobenzoate as a solid (3.86 g, 45%). 1H NMR (300 MHz, DMSO-d6) δ 10.96 (s, 1H), 7.63 (s, 1H), 7.08 (s, 1H), 3.91 (s, 3H), 3.81 (s, 3H).

情報源と証拠