Sulfuric Acid → 8-Bromo-5-fluoroisoquinolin-3-amine

関与物質

反応条件

反応手順

To a mixture of N-(2-bromo-5-fluorobenzyl)-2,2-diethoxyacetimidamide (1.6 g, 4.80 mmol) and dichloromethane (2 mL) was added H2SO4 (1.280 mL, 24.01 mmol). The reaction mixture was stirred at 80° C. for 16 hours, cooled to rt., diluted with EtOAc (100 mL), quenched with ice-water, and neutralized with NaHCO3 solution. The organic phase was washed with water, dried over Na2SO4, and evaporated. The residue was purified on an 80 g Thompson silica cartridge (3% to 100% EtOAc in Hexanes, 1200 mL). The desired product was obtained as a pale yellow solid (0.47 g, 1.950 mmol, 40.6% yield).

情報源と証拠