About the selectivity and reactivity of active nickel electrodes in C–C coupling reactions†
Manuel Breiner,Lara Schulz,Aaron Schüll,Timo Müller,Dieter Schollmeyer,Alexander Bomm,Michael Holtkamp,Uwe Karst,Wolfgang Schade
RSC Advances Pub Date : 04/08/2020 00:00:00 , DOI:10.1039/D0RA02673E
Abstract

Active anodes which are operating in highly stable protic media such as 1,1,1,3,3,3-hexafluoroisopropanol are rare. Nickel forms, within this unique solvent, a non-sacrificial active anode at constant current conditions, which is superior to the reported powerful molybdenum system. The reactivity for dehydrogenative coupling reactions of this novel active anode increases when the electrolyte is not stirred during electrolysis. Besides the aryl–aryl coupling, a dehydrogenative arylation reaction of benzylic nitriles was found while stirring the mixture providing quick access to synthetically useful building blocks.

Graphical abstract: About the selectivity and reactivity of active nickel electrodes in C–C coupling reactions