Diastereoselective Synthesis of Dibenzoazepines through
Chelation on Palladium(IV) Intermediates
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Abstract
Joint palladium/norbornene organometallic
catalysis allows for
straightforward access to dibenzo[<i>c,e</i>]azepines. These
synthetically challenging polycyclic frameworks form in one pot via
a three-component coupling of an aryl iodide, a bromobenzylamine,
and an olefin. A key, atroposelective aryl–aryl coupling from
chelated Pd(IV) intermediates dictates the outcome of the cascade.
DFT modeling sheds light on the complex mechanism that allows the
complete diasteroselectivity to be observed