反应详情

Hydrazine monohydrate (24.94 mL, 514.18 mmol) was added to a solution of 2-(2-(6-methoxypyridin-2-yl)ethyl)isoindoline-1,3-dione (29.03 g, 102.84 mmol) in EtOH (300 mL) at room temperature. The mixture was heated under reflux for 1 hr, and allowed to be cooled to room temperature. The insoluble substance was removed by filtration, and washed with a mixed solvent of diethyl ether/IPE (1:1). The filtrate was concentrated under reduced pressure, and to the obtained residue was added toluene (about 250 mL), and the mixture was concentrated again under reduced pressure. The obtained residue was purified by silica gel column chromatography (NH, solvent gradient; 10→100% ethyl acetate/hexane) to give 2-(6-methoxypyridin-2-yl)ethanamine (14.43 g, 95 mmol, 92%) as a colorless oil.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 1 hr
3. customThe insoluble substance was removed by filtration
4. washwashed with a mixed solvent of diethyl ether/IPE (1:1)
5. concentrationThe filtrate was concentrated under reduced pressure
6. additionto the obtained residue was added toluene (about 250 mL)
7. concentrationthe mixture was concentrated again under reduced pressure
8. customThe obtained residue was purified by silica gel column chromatography (NH, solvent gradient; 10→100% ethyl acetate/hexane)