Following a slight modification of GP5, using ketone 1ac and olefin 2c as starting materials at 80 o C. After 24 hours, 4ae was obtained as a colourless oil in 36% yield (10.5 mg) E/Z = 9:1. In a glovebox, an oven dried screw-capped 2 mL vial was charged with a magnetic stir bar, Ni( tBu stb)3 (10 μmol), carbene ligand precursor L8•HBF4 (10 μmol), KOtBu (10 μmol) freshly distilled and degassed (free pump thaw) CPME (Cyclopentyl methyl ether 0.1 mL) was then added and the catalyst mixture was stirred at room temperature for 30 min, then 1,5cycloctadiene (0.2 mmol) was then added during which a dark solution is formed. The mixture was stirred at room temperature for 10 minutes, ketone (0.1 mmol) was then added successively. The vial was sealed with a Teflon-lined screw cap, and running inside the glovebox at room temperature After 72 h, the vial was shipped outside of the glovebox. The reaction mixture was diluted with dichloromethane and filtered through a plug of silica gel. The crude solution was concentrated in vacuum and subjected to column chromatography to isolate the products.