1.1: triethylamine; palladium 10 on activated carbon / water; ethylene glycol dimethyl ether; methanol / 45 - 50 °C 2.1: water / 20 - 30 °C 3.1: N-ethyl-N,N-diisopropylamine / methanol / 20 h / 20 - 25 °C 4.1: sodium hydroxide / methanol / 20 h / 20 - 25 °C 5.1: sodium tris(acetoxy)borohydride / tetrahydrofuran / 1 h / 20 - 25 °C 5.3: 3 h View Scheme