A Unified and Practical Method for Carbon–Heteroatom Cross‐Coupling using Nickel/Photo Dual Catalysis
作者:Randolph A. Escobar、Jeffrey W. Johannes
DOI:10.1002/chem.202000052
日期:2020.4.21
While carbon-heteroatom cross-couplingreactions have been extensively studied, many methods are specific and limited to a particular set of substrates or functional groups. Reported here is a general method that allows for C-O, C-N and C-Scross-couplingreactions under one general set of conditions. We propose that an energy transfer pathway, in which an iridium photosensitizer produces an excited
Palladium-Catalyzed 2,2,2-Trifluoroethoxylation of Aromatic and Heteroaromatic Chlorides Utilizing Borate Salt and the Synthesis of a Trifluoro Analogue of Sildenafil
作者:Bálint Pethő、Márton Zwillinger、János T. Csenki、Anna E. Káncz、Balázs Krámos、Judit Müller、György T. Balogh、Zoltán Novák
DOI:10.1002/chem.201704205
日期:2017.11.7
A simple and convenient method was developed for the introduction of a 2,2,2‐trifluoroethoxy group to various aromatic and heteroaromatic systems. The novel process utilizes aromatic chlorides as substrates, and tetrakis(2,2,2‐trifluoroethoxy) borate salt as an inexpensive and readily available fluoroalkoxy source in a palladium‐catalyzed cross‐coupling reaction. The power of the developed methodology