Synthesis of 5,6-, 5,8- and 7,8-Isoquinolinediones from the Corresponding Isoquinolinols and Dimethoxyisoquinolines.
作者:Yoshiyasu KITAHARA、Tatsuya NAKAI、Shinsuke NAKAHARA、Manabu AKAZAWA、Masaro SHIMIZU、Akinori KUBO
DOI:10.1248/cpb.39.2256
日期:——
5, 8-Isopuinolinediones (12, 18, 25), 7, 8-isoquinolinediones (14, 19) and 5, 6-isoquinolinediones (26) were synthesized by oxidative demethylation of the corresponding dimethoxyisoquinolines with cerium(IV) ammonium nitrate or silver(II) oxide. 8-Dialkylamino-5, 6-isoquinolinediones (31) and 3, 5-bis(dialkylamino)-7, 8-isoquinolinediones (33) were prepared by copper(II)-catalyzed oxidation of the corresponding isoquinolinols with secondary amines. 5, 8-Isoquinolinediones (29, 34, 40) were also prepared.
5, 8-异喹啉二酮(12, 18, 25)、7, 8-异喹啉二酮(14, 19)和5, 6-异喹啉二酮(26)是通过与铈(IV)铵硝酸盐或银(II)氧化物的氧化脱甲基反应合成的。8-二烷基氨基-5, 6-异喹啉二酮(31)和3, 5-双(双烷基氨基)-7, 8-异喹啉二酮(33)是通过铜(II)催化的相应异喹啉醇与二级胺的氧化反应制备的。5, 8-异喹啉二酮(29, 34, 40)也已被制备。