Synthesis of Indoles through Domino Reactions of 2‐Fluorotoluenes and Nitriles
作者:Jianyou Mao、Zhiting Wang、Xinyu Xu、Guoqing Liu、Runsheng Jiang、Haixing Guan、Zhipeng Zheng、Patrick J. Walsh
DOI:10.1002/anie.201904658
日期:2019.8.5
chemistry, and therefore, novel and efficient approaches to their synthesis are in high demand. Among indoles, 2‐aryl indoles have been described as privileged scaffolds. Advanced herein is a straightforward, practical, and transition‐metal‐free assembly of 2‐aryl indoles. Simply combining readily available 2‐fluorotoluenes, nitriles, LiN(SiMe3)2, and CsF enables the generation of a diverse array of indoles
Synthesis of indoles with a polyfluorinated benzene ring
作者:Larisa V. Politanskaya、Igor P. Chuikov、Vitalij D. Shteingarts
DOI:10.1016/j.tet.2013.07.037
日期:2013.9
A two-step sequence consisting of a Sonogashiracoupling of polyfluorinated 2-iodoanilines with terminal alkynes, followed by a KOH promoted cyclization of the 2-alkynylanilines thus formed, has been developed as a one-potsynthesis of 2-R-indoles (R=n-Bu, Ph, CH2OTHP→CH2OH, C(CH3)2OH→H) containing a polyfluorinated benzene moiety.
The reactivity of a series of polyfluorinated 2-alkynylanilines with various alcohols using p-TSA has been studied. It was found that hydration of the triple bond gave rise to polyfluorinated 2-aminoarylketones and competed with an electrophilic heterocyclization reaction leading to polyfluorinated indoles. The dependence of the reaction pathways on the nature of the alkynylaniline substituents has