Metathesis Catalyst Usable in Water Media

AquaMet, developed by Grela et al., is a Hoveyda-type metathesis catalyst and suitable for water systems due to its quaternary ammonium group. AquaMet can be applied to the synthesis of E-olefins from corresponding internal Z-olefins or terminal olefins through the intermolecular metathesis. Similarly cyclic olefins are also given from a 1,6-diene or an eneyne through the ring closing metathesis with moderate yield.¹⁾ Furthermore, the application of AquaMet as a supported catalyst on mesoporous silica with an affinity between a quaternary ammonium group and silica has been reported.²⁾