A photoresponsive gold catalyst based on azobenzene-functionalized NHC ligands†
Bas
de Bruin 
a
and
Joost N. H.
Reek
*a
a
and
Joost N. H.
Reek
*a
Abstract
An azobenzene-bearing N-heterocyclic carbene-based gold catalyst is reported of which the reactivity in a cyclization reaction depends on the isomeric state of the azobenzene. The configurations of the catalyst can be reversibly switched by light and are stable during the reaction, effectively leading to a switchable catalyst system.
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