Cobalt-Catalyzed CH Cyanation of Arenes and Heteroarenes
作者:Jie Li、Lutz Ackermann
DOI:10.1002/anie.201409247
日期:2015.3.16
Carboxylate assistance proved to be the key for the success of efficient cobalt(III)‐catalyzedCH cyanations. Thus, an in situ generated cationic cobalt complex was identified as a versatile catalyst for the site‐selective synthesis of various aromatic and heteroaromatic nitriles with ample substrate scope.
An efficient rhodium-catalyzed regioselective C-H bond cyanation of arenes was developed using tert-butyl isocyanide as the cyanide source. A wide range of (hetero)aryl and cycloalkenyl nitriles could be afforded with high regioselectivity and good functional group tolerance.
α-Iminonitrile: a new cyanating agent for the palladium catalyzed C–H cyanation of arenes