1.1: diisobutylaluminium hydride / toluene / 1.5 h / -78 °C / |Inert atmosphere 2.1: lithium diisopropyl amide / tetrahydrofuran / 0.5 h / -95 °C / |Inert atmosphere 2.2: -95 - -30 °C / |Inert atmosphere 2.3: 1.5 h / -30 - 0 °C / |Inert atmosphere 3.1: zinc / N,N-dimethyl-formamide / 2 h / 20 °C / |Inert atmosphere 4.1: indium tribromide / 1,2-dichloro-ethane / 0.5 h / 20 °C / |Inert atmosphere; |Glovebox 5.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,2-dichloro-ethane / 1.5 h / |Inert atmosphere; |Reflux; |Glovebox View Scheme