Synthesis of Quinobenzo-1,4-thiazines from Diquino-1,4-dithiin and 2,2’-Dichloro-3,3’-diquinolinyl Disulfide
作者:Krystian Pluta、Małgorzata Jeleń
DOI:10.3987/com-09-11736
日期:——
10-substituted quinobenzo-1,4-thiazines (benzo[b]-1-azaphenothiazines) (5) and (10), has been worked out from diquino-1,4-dithiin (5,12-diaza-6,13-dithiapentacene) (2) as fusion reactions with aniline hydrochlorides (8)·HCl via the 1,4-dithiin ring opening and the 1,4-thiazine ring closure. The better results were obtained when 2,2'-dichloro-3,3'-diquinolinyl disulfide (9) reacted with anilines (8) in MEDG
合成新型四环氮杂吩噻嗪,6-, 8-, 9- 和 10-取代的 quinobenzo-1,4-thiazines (benzo[b]-1-azaphenothiazines) (5) 和 (10), 从diquino-1,4-dithiin (5,12-diaza-6,13-dithiapentacene) (2) 通过 1,4-dithiin 开环和 1,4-thiazine 与盐酸苯胺 (8)·HCl 发生融合反应闭环。当 2,2'-二氯-3,3'-二喹啉基二硫化物 (9) 与苯胺 (8) 在 MEDG 中反应时,获得了更好的结果。选择的 6H-quinobenzo-1,4-thiazines (5a) (5c) 和 (5g) 通过使用烷基卤化物的 N-烷基化转化为 6-烷基衍生物 (10a-10n)。6-甲基衍生物(10a)的同核NOE实验证实产物结构为醌[3,2-b]苯并[1,4]噻嗪。