Highly efficient Sandmeyer reaction on immobilized Cu I /Cu II -based catalysts
作者:Irina G. Tarkhanova、Michail G. Gantman、Alexander S. Sigeev、Konstantin I. Maslakov、Vladimir M. Zelikman、Irina P. Beletskaya
DOI:10.1016/j.mencom.2018.05.010
日期:2018.5
Highly effective embodiment of Sandmeyerreaction has been revealed for Cu-based catalysts incorporating ionic liquid on Silochrom support. The most active catalyst (TOF = = 4000–8000 h–1) contains comparable amounts of cuprous and cupric chloride anions. The reported method allows one to carry out the reaction for anilines in the one-pot mode.
Two visible-light mediated protocols (based on a copper photoredox catalyzed and on a photochemical reaction, respectively) for the preparation of aryl thiocyanates and aryl selenocyanates from arylazo sulfones are presented herein, by exploiting the peculiar photoreactivity and redox activity of such substrates. The developed reactions take place in good to satisfactory yields and with a large scope