Pd-catalyzed asymmetric oxidative C-H/C-H cross-coupling reaction between dialkylaminomethylferrocenes and indolizines

Oxidative C-H/C-H cross-coupling reactions between two (hetero)arenes through 2-fold C-H activation offer rapid assembly of diverse bi(hetero)aryls. Herein, a Pd-catalyzed asymmetric oxidative C-H/C-H cross-coupling reaction of ferrocenes with indolizines was disclosed. A palladium(II)/monoprotected amino acid (MPAA) catalytic system exhibited excellent reactivity, regioselectivity, and enantioselectivity for the coupling reaction. This approach marks the first example of direct arylation of indolizines in an enantioselective oxidative C-H/C-H cross-coupling process and offers a powerful strategy for the synthesis of highly enantioenriched planar chiral ferrocenes.