1.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 2.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 2.2: 120 - 215 °C 3.1: AlCl3, aluminium chloride / tetrachloroethane, 1,1,2,2- / 20 °C / Cooling with ice 4.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 4.2: 120 - 215 °C 5.1: sulfuric acid / Reflux 6.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 7.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 8.1: n-butyllithium; N-cyclohexyl-N-isopropylamine / tetrahydrofuran; hexane / -78 °C / Inert atmosphere 8.2: 1 h / -78 °C / Inert atmosphere 9.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 10.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 10.2: Inert atmosphere 11.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

1.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 1.2: 120 - 215 °C 2.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 3.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 3.2: 120 - 215 °C 4.1: AlCl3, aluminium chloride / tetrachloroethane, 1,1,2,2- / 20 °C / Cooling with ice 5.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 5.2: 120 - 215 °C 6.1: sulfuric acid / Reflux 7.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 8.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 9.1: n-butyllithium; N-cyclohexyl-N-isopropylamine / tetrahydrofuran; hexane / -78 °C / Inert atmosphere 9.2: 1 h / -78 °C / Inert atmosphere 10.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 11.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 11.2: Inert atmosphere 12.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

1.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 1.2: Inert atmosphere 2.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

1.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 2.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 2.2: Inert atmosphere 3.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

1.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 1.2: 120 - 215 °C 2.1: sulfuric acid / Reflux 3.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 4.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 5.1: n-butyllithium; N-cyclohexyl-N-isopropylamine / tetrahydrofuran; hexane / -78 °C / Inert atmosphere 5.2: 1 h / -78 °C / Inert atmosphere 6.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 7.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 7.2: Inert atmosphere 8.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

1.1: AlCl3, aluminium chloride / tetrachloroethane, 1,1,2,2- 2.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 2.2: 120 - 215 °C 3.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 4.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 4.2: 120 - 215 °C 5.1: AlCl3, aluminium chloride / tetrachloroethane, 1,1,2,2- / 20 °C / Cooling with ice 6.1: hydrazine hydrate / diethylene glycol / 0.5 h / 20 °C 6.2: 120 - 215 °C 7.1: sulfuric acid / Reflux 8.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 9.1: methanesulfonic acid / 0.5 h / 90 °C / Inert atmosphere 10.1: n-butyllithium; N-cyclohexyl-N-isopropylamine / tetrahydrofuran; hexane / -78 °C / Inert atmosphere 10.2: 1 h / -78 °C / Inert atmosphere 11.1: palladium 10 on activated carbon / triglyme (triethylene glycol dimethyl ether) / 4 h / 240 °C / Inert atmosphere 12.1: diisobutylaluminium hydride / hexane; toluene / 1 h / -78 °C / Inert atmosphere 12.2: Inert atmosphere 13.1: methanesulfonic acid / dichloromethane / 0.5 h / 20 °C / Cooling with ice View Scheme

palladium on activated charcoal T=310°C;

platinum on activated charcoal T=320°C;

platinum on activated charcoal T=320°C;

hydrogen T=640 - 650°C; beim Leiten durch Porzellanroehren;