RTILs in Catalytic Olefin Metathesis Reactions

Abstract

International audienceThe homogeneous catalytic olefin metathesis reaction has found a tremendous interest in the past 20 years and multiple applications have now emerged in fine chemical synthesis and polymer chemistry. Immobilization of olefin metathesis (pre)catalysts in room temperature ionic liquids (RTILs) offers the opportunity to recover and in some cases reuse the catalyst and it is also a practical way to reduce the level of metal contaminants in the desired products. This chapter covers the research in this field from the early days with an emphasis on recent results and with a critical look at the origin of catalyst recycling

Room Temperature Ionic Liquids as Green Solvent Alternatives in the Metathesis of Oleochemical Feedstocks

“…In most of the publications reported, the use of ionic liquids in metathesis has led to significant enhancement in the reactivity, yield and reaction rate. Another advantage of using ionic liquids is the ease of recovering and reusing the catalyst and the ionic liquids without much drop in activity [78]. The ability to manipulate structure and function of ILs affords possibilities for designing a new generation of solvents with improved greener qualities and a wider industrial application [79].…”

“…Several types of olefin metathesis are identified [10,11] and include self-metathesis (SM), cross-metathesis (CM), ring-closing metathesis, (RCM), ring-opening metathesis (ROM), ring-opening metathesis polymerisation (ROMP) and acyclic diene metathesis polymerisation (ADMET) (Scheme 2). The metathesis reactions that are most widely applied in oleochemistry are SM, CM and ADMET.…”