posted on 2019-04-17, 00:00authored bySuong
T. Nguyen, Qilei Zhu, Robert R. Knowles
Olefin
aminations are important synthetic technologies for the
construction of aliphatic C–N bonds. Here we report a catalytic
protocol for olefin hydroamidation that proceeds through transient
amidyl radical intermediates that are formed via proton-coupled electron
transfer (PCET) activation of the strong N–H bonds in N-alkyl amides by an excited-state iridium photocatalyst
and a dialkyl phosphate base. This method exhibits a broad substrate
scope, high functional group tolerance, and amenability to use in
cascade polycyclization reactions. The feasibility of this PCET protocol
in enabling the intermolecular anti-Markovnikov hydroamidation reactions
of unactivated olefins is also demonstrated.