An Improved Synthesis of Methyl 1,3-Dihydro-2<i>H</i>-pyrrolo[3,4-<i>b</i>]quinoline-2-carboxylate
作者:Philippe Gautret、Benoît Rigo、Rufine Akue-Gedu、Jean-Pierre Lelieur
DOI:10.1055/s-2007-990821
日期:2007.11
Optimization of an old route leads very easily, in four steps, to methyl 1,3-dihydro-2H-pyrrolo[3,4-b]quinoline-2-carboxylate in 45% yield from commercial starting materials. This procedure can be compared to recently described methods whose yields were only 23-28% and required five to seven steps from advanced intermediates and chromatographic purifications. Moreover, using this method, the title compound can now be obtained in large quantities.
旧路线的优化很容易通过四个步骤从商业起始原料中得到 1,3-二氢-2H-吡咯并[3,4-b]喹啉-2-甲酸甲酯,产率达 45%。该程序可与最近描述的方法进行比较,后者的收率仅为 23-28%,并且需要从高级中间体到色谱纯化的五到七个步骤。此外,使用该方法,现在可以大量获得标题化合物。