ic402301u_si_004.cif (74.43 kB)
Synthesis of New Dipyrido-Annulated N‑Heterocyclic Carbenes with Ortho Substituents
dataset
posted on 2016-02-18, 14:39 authored by Shin-ichi Fuku-en, Junki Yamamoto, Mao Minoura, Satoshi Kojima, Yohsuke YamamotoA method for the introduction of
various substituents at the 4 and 8 positions of 2,10-di-tert-butyldipyrido[1,2-c;2′,1′-e]imidazolium salts, is described. The new imidazolium salts
bearing substituents (R′ = Cl, SPh) at the 4 and 8 positions
are synthesized in three-step procedures, and carbenes generated from
the imidazolium salts can be used to give the corresponding rhodium
complexes. The role of the 4,8-substituents can be either bystanders
or coordinating ligands according to the nature of the metal moiety.