1,8-diazabicyclo[5.4.0]undec-7-ene in dichloromethane T=0 - 20°C;

1: 100 percent / pyridinium chlorochromate; celite / CH2Cl2 / 1 h 2: 90 percent / DIBAL-H / diethyl ether; hexane / -78 - 20 °C 3: 90 percent / DBU / CH2Cl2 / 0 - 20 °C View Scheme

1: 90 percent / DIBAL-H / diethyl ether; hexane / -78 - 20 °C 2: 90 percent / DBU / CH2Cl2 / 0 - 20 °C View Scheme

1.1: oxalyl dichloride; dimethyl sulfoxide; triethylamine / dichloromethane / -78 - 20 °C / Inert atmosphere 1.2: 20 °C / Inert atmosphere 2.1: diisobutylaluminium hydride / diethyl ether; hexane / -78 - 20 °C / Inert atmosphere 3.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere View Scheme

1: diisobutylaluminium hydride / diethyl ether; hexane / -78 - 20 °C / Inert atmosphere 2: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere View Scheme

1: anhydrous xylene / Heating; Inert atmosphere 2: [(p-cymene)Ru(μ-Cl)3RuCl(3-phenyl-1-indenylidene)(PCy3)] / deuterated toluene / 0.33 h / 30 °C View Scheme

1: anhydrous xylene / Heating; Inert atmosphere 2: water; sodium hydroxide / methanol / 12 h / 50 °C / Inert atmosphere 3: potassium carbonate / acetonitrile / 24 h / 20 °C / Inert atmosphere View Scheme