Lambert Salt-Initiated Development of Friedel–Crafts Reaction on Isatin to Access Distinct Derivatives of Oxindoles
作者:Jabir Khan、Aparna Tyagi、Naveen Yadav、Rina Mahato、Chinmoy K. Hazra
DOI:10.1021/acs.joc.1c02058
日期:2021.12.17
yields. A preliminary mechanistic study revealed that the reaction proceeds via a monoarylated product followed by a nucleophilic attack by another electron-rich arene nucleophile under mild conditions. The potential of newly synthesized symmetric/unsymmetric 3,3-disubstituted oxindole, 3-substituted 3-hydroxy oxindoles, 3,3-di(indolyl)indolin-2-ones, and α-aryl oxindoles as valuable building blocks is
本文描述了一种温和的无金属且有效的合成生物学上重要的 3-芳基羟吲哚衍生物的途径。使用兰伯特盐引发的靛红加氢芳基化,可以从单一起始底物以良好至优异的收率合成多种单芳基化产物、对称/不对称双芳基化产物和脱氧加氢芳基化产物。初步机理研究表明,反应通过单芳基化产物进行,然后在温和条件下由另一种富电子芳烃亲核试剂进行亲核攻击。进一步说明了新合成的对称/不对称 3,3-二取代羟吲哚、3-取代 3-羟基羟吲哚、3,3-二(吲哚基)吲哚啉-2-酮和 α-芳基羟吲哚作为有价值的结构单元的潜力。