1: 44 percent / NaH / tetrahydrofuran / 16 h / Ambient temperature 2: 68 percent / Bu3SnH, AIBN / benzene / Heating 3: 88 percent / 50percent KOH / ethanol 4: 48 percent / DDQ View Scheme

1: 88 percent / 50percent KOH / ethanol 2: 48 percent / DDQ View Scheme

1: 68 percent / Bu3SnH, AIBN / benzene / Heating 2: 88 percent / 50percent KOH / ethanol 3: 48 percent / DDQ View Scheme

1: potassium tert-butylate / tetrahydrofuran / 0 °C / |Schlenk technique; |Inert atmosphere 2: potassium tert-butylate / tetrahydrofuran / 0 °C / |Schlenk technique; |Inert atmosphere 3: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / toluene / 1 h / 100 °C / |Schlenk technique; |Inert atmosphere View Scheme

1.1: sodium hydride / tetrahydrofuran; mineral oil / 0 °C / |Schlenk technique; |Inert atmosphere 1.2: 0 - 20 °C / |Schlenk technique; |Inert atmosphere 2.1: n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C / |Schlenk technique; |Inert atmosphere 2.2: -78 - 20 °C / |Schlenk technique; |Inert atmosphere 3.1: potassium tert-butylate / tetrahydrofuran / 0 °C / |Schlenk technique; |Inert atmosphere 4.1: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / toluene / 1 h / 100 °C / |Schlenk technique; |Inert atmosphere View Scheme

1.1: n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C / |Schlenk technique; |Inert atmosphere 1.2: -78 - 20 °C / |Schlenk technique; |Inert atmosphere 2.1: potassium tert-butylate / tetrahydrofuran / 0 °C / |Schlenk technique; |Inert atmosphere 3.1: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / toluene / 1 h / 100 °C / |Schlenk technique; |Inert atmosphere View Scheme

1: potassium tert-butylate / tetrahydrofuran / 0 °C / |Schlenk technique; |Inert atmosphere 2: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / toluene / 1 h / 100 °C / |Schlenk technique; |Inert atmosphere View Scheme