New nitrochromenylmethylidene-containing ruthenium metathesis catalyst

New Hoveyda-Grubbs type catalyst containing nitrochromenyl ligand is reported herein. The catalyst was tested in model RCM, CM and enyne reactions. Its activity was compared with that of commercially available complexes and with literature data for Grela catalyst. New catalyst appeared to be fast initiating, but less stable than other catalysts.