Macrocyclization of Dienes under Confinement with Cationic Tungsten Imido/Oxo Alkylidene N‐Heterocyclic Carbene Complexes
Felix Ziegler,
Johanna R. Bruckner,
Michal Nowakowski
et al.
Abstract:Macrocyclization reactions are still challenging due to competing oligomerization, which requires the use of small substrate concentrations. Here, the cationic tungsten imido and tungsten oxo alkylidene N‐heterocyclic carbene complexes [[W(N‐2,6‐Cl2‐C6H3)(CHCMe2Ph(OC6F5)(pivalonitrile)(IMes)+ B(ArF)4‐] (W1) and [W(O)(CHCMe2Ph(OCMe(CF3)2)(IMes)(CH3CN)+ B(ArF)4‐] (W2) (IMes = 1,3‐dimesitylimidazol‐2‐ylidene; B(ArF)4‐ = tetrakis(3,5‐bis(trifluoromethyl)phenyl borate) have been immobilized inside the pores of orde… Show more
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