Palladium-Catalyzed C(sp2)–H Cyanation Using Tertiary Amine Derived Isocyanide as a Cyano Source
摘要:
An unprecedented palladium-catalyzed cyanation of aromatic C-H bonds by using tertiary amine derived isocyanide as a novel cyano source was developed. Cu(TFA)(2) was used as a requisite stoichiometric oxidant. Mechanistic studies suggest that a tertiary carbon cation-based intermediate Is involved following the C-N bond breakage.
Copper-catalyzed tandem intramolecular cyclization/coupling reaction: solvent effect on reaction pathway
作者:Mitsuaki Yamashita、Toshiaki Noro、Akira Iida
DOI:10.1016/j.tetlet.2013.10.012
日期:2013.12
In this study, we developed direct methods for the synthesis of 3-substituted indoles from o-allcynylan-ilines by utilizing a copper-catalyzed tandem intramolecular cyclization/coupling reaction under mild and simple reaction conditions. Our investigation revealed that choice of the aprotic polar solvents and additives such as camphorsulfonic acid is critical in this reaction. (C) 2013 Elsevier Ltd. All rights reserved.