反应详情

A suspension of 6-methoxy-8-nitroquinoline (20 g, 98 mmol) in methanol (200 ml) was hydrogenated over PtO2 (0.5 g) at 50 p.s.i. for 2.5 hours. The solution was treated with acetic acid (11.5 ml, 200 mmol) and PtO2 (0.5 g) and hydrogenated at 50 p.s.i. for 18 hours. The catalyst was removed by filtration and the solution evaporated in vacuo to give an oil. The residue was basified with 1 N-sodium hydroxide (200 ml) and the aqueous mixture extracted with diethyl ether (2×200 ml). The extracts were dried (MgSO4) and evaporated in vacuo to give crude 8-amino-1,2,3,4-tetrahydro-6-methoxyquinoline as a red oil.

1. waitfor 18 hours
2. customThe catalyst was removed by filtration
3. customthe solution evaporated in vacuo
4. customto give an oil
5. extractionthe aqueous mixture extracted with diethyl ether (2×200 ml)
6. dry with materialThe extracts were dried (MgSO4)
7. customevaporated in vacuo