1.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / |Inert atmosphere 1.2: 1 h / 0 °C 2.1: tri-n-butyl-tin hydride; 2,2'-azo-bisisobutyronitrile / toluene / 16 h / 130 °C / |Inert atmosphere 3.1: benzotriazol-1-ol; dicyclohexyl-carbodiimide; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 16 h / 20 °C / |Inert atmosphere View Scheme