1992-06-9Relevant academic research and scientific papers
Fluorinated Unsymmetrical N,N′-Diaryl Imidazolium Salts—New Functionalized NHC-Ligand Precursors
Topchiy, Maxim A.,Zotova, Maria A.,Masoud, Salekh M.,Mailyan, Artur K.,Ananyev, Ivan V.,Nefedov, Sergey E.,Asachenko, Andrey F.,Osipov, Sergey N.
, p. 6663 - 6674 (2017)
An efficient and scaled-up synthesis of the imidazol-2-ylidene-based unsymmetrical NHC precursors bearing the sterically demanding hexafluoroisopropylalkoxy group [(CF3)2(OR)C?] at the ortho position of the N-aryl substituent was dev
Metathesis Catalysts with Fluorinated Unsymmetrical NHC Ligands
Masoud, Salekh M.,Mailyan, Artur K.,Dorcet, Vincent,Roisnel, Thierry,Dixneuf, Pierre H.,Bruneau, Christian,Osipov, Sergey N.
, p. 2305 - 2313 (2015/06/23)
The synthesis of new fluorinated ruthenium(II) carbene second-generation precatalysts with unsymmetrical N-heterocyclic carbene ligands has been developed. The reaction profiles of these complexes have been studied in RCM with model substrates such as diethyl diallyl- and allylmethallyl-malonate, and CM model reaction of allylbenzene with 1,4-diacetoxybut-2-ene. In olefin metathesis reactions, the new fluorinated second-generation Grubbs complexes exhibit comparable activity with respect to commercially available Grubbs catalysts. On the other hand, in RCM reactions, the Hoveyda-type catalysts present a latent character, which is not present in the classical second-generation Hoveyda catalyst. (Chemical Presented).
