Nickel-Catalyzed Direct Amination of Arenes with Alkylamines
摘要:
The efficient nickel-catalyzed direct amination of arenes with simple alkylamines has been achieved with the assistance of a bidentate directing group through sp(2) C-H bond functionalization. Preliminary mechanistic investigations indicate that the reaction probably proceeds through a Ni-I/Ni-III catalytic pathway.
Arenes possessing an 8-quinolinylamide group as a directing group are ortho aminated with N-chloroamines and N-benzoyloxyamines in the presence of an iron/diphosphine catalyst and an organometallic base to produce anthranilic acid derivatives in high yield. The reaction proceeds via iron-catalyzed C H activation, followed by the reaction of the resulting iron intermediate with N-chloroamine. The choice of the directing group and diphosphine ligand is crucial for obtaining the anthranilic acid derivative with high yield and product selectivity.