Wu, Chung-Yeh; Horibe, Takahiro; Jacobsen, Christian Borch; Toste, F. Dean published an article on January 22 ,2015. The article was titled 《Stable gold(III) catalysts by oxidative addition of a carbon-carbon bond》, and you may find the article in Nature (London, United Kingdom).Reference of Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I) The information in the text is summarized as follows:
A gold bis(diisopropylphenyl)imidazolidinylidene complex underwent oxidative addition with biphenylene to yield an N-heterocyclic carbene gold(III) complex I (R = i-Pr); in the presence of silver triflate or hexafluoroantimonate, I generated stable Lewis acidic gold(III) complexes which act as oxophilic Lewis acid catalysts for regioselective Michael addition reactions of enals and a trienal and regioselective reduction and stereoselective Diels-Alder reactions of dienals. In addition an allenyl enal underwent a diastereoselective [2 + 2] cycloaddition reaction in the presence of I and silver hexafluoroantimonate. The origin of the regioselectivity and catalytic activity was elucidated by X-ray crystallog. anal. of an isolated cationic Au(III) cinnamaldehyde complex; the structures of I and of a DMF complex of the Au(III) cation derived from I were also determined by X-ray crystallog. In the part of experimental materials, we found many familiar compounds, such as Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2Reference of Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I))
Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2) belongs to imidazoles.Imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies.
However, the application of imidazoles is not limited to the field of peptides and peptidomimetics. Reference of Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem