作者:Valeriya S. Velezheva、Albert G. Kornienko、Sergey V. Topilin、Ascar D. Turashev、Alexander S. Peregudov、Patrick J. Brennan
DOI:10.1002/jhet.5570430410
日期:2006.7
A novel method for Lewis acid catalyzed Nenitzescu indole syntheses of 5-hydroxyindoles bearing different substituents in positions 1 )Alk, Bn, Ar), 2 )Me, Et, Ph), and 3 )COOEt, COMe, CONHPh) as well as tricyclic derivatives are reported. The method is simple, rapid, efficient, and allows preparation of hydroxyindoles from 1,4-benzoquinone and enamines in good to excellent yields with the use of low-polar
Lewis酸催化Nenitzescu吲哚合成5羟基吲哚的新方法,该位置在1)Alk,Bn,Ar),2)Me,Et,Ph)和3)COOEt,COMe,CONHPh)和三环上带有不同的取代基报告了衍生物。该方法简单,快速,有效,并且在弱路易斯酸催化剂的存在下,使用低极性溶剂,可以由1,4-苯醌和烯胺制备羟基吲哚,产率高至优异。用非氧化还原机理解释了在这种温和条件下5-羟基吲哚的形成。