The copper‐mediated fluroalkylation/cyclization of N‐allyl anilines has been described with unactivated double bonds as the radical acceptor. The reaction provides an efficient and direct access to 3‐fluoroalkyl indolines in moderate to good yields. This protocol combines a simple experimental procedure with low‐costing fluoroalkylated sources and excellent functional group tolerance.
A convenient method for the synthesis of 2-arylazocarboxylates from 2-arylhydrazinecarboxylates by aerobicoxidation with ironphthalocyanine is described. The reaction is applicable to oxidative activation of 1-acyl-2-phenylhydrazines. Some preliminary experiments suggest Michaelis–Menten kinetics and participation of radical species in the reaction mechanism.
General Approach to Amides through Decarboxylative Radical Cross-Coupling of Carboxylic Acids and Isocyanides
作者:Qing Yan、Qing-Jia Yuan、Andrey Shatskiy、Gregory R. Alvey、Elena V. Stepanova、Jian-Quan Liu、Markus D. Kärkäs、Xiang-Shan Wang
DOI:10.1021/acs.orglett.4c00872
日期:2024.4.26
silver-catalyzed protocol for decarboxylative cross-coupling between carboxylicacids and isocyanides, leading to linear amide products through a free-radical mechanism. The disclosed approach provides a general entry to a variety of decorated amides, accommodating a diverse array of radical precursors, including aryl, heteroaryl, alkynyl, alkenyl, and alkyl carboxylicacids. Notably, the protocol proved to
Amides were produced from carboxylic acids and amines by using XtalFluor-E as an activator. Even poorly reactive carboxylic acids can be transformed to amides. In addition, optically active amines and/or carboxylic acids were not epimerized/racemized during the process.