Methoxylation on the C5 and C6 positions of quinolines with methanol
作者:Guodong Wang、Junfen Han、Kai Wang、Hongshaung Li、Guiyun Duan、Chengcai Xia、Furong Li
DOI:10.1016/j.catcom.2018.05.021
日期:2018.8
The C(5)H and C(6)H methoxylation of quinoline amides with methanol was presented by using PtCl2 or triethylamine as an additive. The reaction when conducted under mild conditions provides expedient access to quinoline derivatives, which are frequently found in many drug candidates.
Twenty-five 8-amino-5, 6-quinolinediones were prepared by copper(II)-catalyzed oxidation of 6-quinolinol in methanol with secondary amines, or by oxidative demethylation of the corresponding 5, 6-dimethoxyquinolines in aqueous acetonitrile with cerium(IV) ammonium nitrate.