Iodine(III)-Mediated Generation of Nitrogen-Tethered Orthoquinol Acetates for the Construction of Oxygenated Indole, Quinoline, and Phenanthridine Alkaloid Motifs
作者:Laurent Pouységu、Anne-Virginie Avellan、Stéphane Quideau
DOI:10.1021/jo020010d
日期:2002.5.1
Functionalized indole and quinoline derivatives are conveniently prepared from nitrogen-tethered 2-methoxyphenols via phenyliodine(III) diacetate mediated oxidative acetoxylation, followed by a fluoride- or base-induced intramolecular nucleophilic addition reaction. This regioselective Michael-type addition step is further discussed in view of the rearrangement of orthoquinol acetate intermediates
官能化的吲哚和喹啉衍生物可以方便地由氮系的2-甲氧基苯酚经二碘苯基碘(III)介导的氧化乙酰氧基化,然后由氟化物或碱引起的分子内亲核加成反应制备。考虑到有时在原位观察到的邻苯二甲酸邻苯二酚中间体重排成乙酸对苯二酚乙酸酯,进一步讨论了该区域选择性迈克尔型添加步骤。本文描述了该方法在功能化菲啶的合成中的应用及其在构建多加氧的茄基型生物碱类骨架中的潜力。