Novel angularly substituted [1,4]thiazino[3,4‐a]isoquinoline carboxylic acids prepared by cyclic imine‐cyclic anhydride reaction
作者:Aleksandar Pashev、Nikola Burdzhiev、Elena Stanoeva
DOI:10.1002/jhet.4601
日期:2023.3
The reaction between 1-aryl-3,4-dihydroisoquinolines and monocyclic anhydrides was studied for the first time. The method is the first one-step route to previously unknown angularly-aryl substituted racemic [1,4]thiazino[3,4-a]isoquinoline derivatives with trans configuration. It was found that electron-withdrawing substituents in the p-position of the aryl group in the starting 3,4-dihydroisoquinoline
首次研究了1-芳基-3,4-二氢异喹啉与单环酸酐的反应。该方法是获得以前未知的具有反式构型的角芳基取代外消旋 [1,4] 噻嗪并 [3,4-a] 异喹啉衍生物的第一个单步路线。研究发现,起始 3,4-二氢异喹啉中芳基对位的吸电子取代基导致更高的产率和更短的反应时间,这与之前对高邻苯二甲酸酐和类似无环 N 反应的观察结果相反-芳基甲胺。