SEARCH Articles Figures Tables Addition reactions alkene precursors Alkenes aziridine precursors Allenylidene-Ruthenium Complexes as Alkene Metathesis Catalyst Precursors the First Evidence Catalytic reactions alkene precursors Heteroatomic nucleophiles alkene precursors Oxidants alkene precursors Propargylic Ethers as Alkene Metathesis Initiator Precursors Generation of Alkenyl Alkylidene-Ruthenium Catalysts Routes from alkene precursors Sugars alkenic precursors