1.1: potassium tert-butylate / tetrahydrofuran / 0 °C 2.1: ethanol; ammonium cerium (IV) nitrate / 50 - 70 °C 2.2: 20 - 70 °C 3.1: triethylamine / ethanol / 36 h / 125 °C / 3677.86 Torr / Autoclave; Inert atmosphere 4.1: isopentyl nitrite / acetonitrile / 50 - 70 °C 5.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 25 - 35 °C 6.1: lithium borohydride / tetrahydrofuran / 0 - 30 °C 7.1: hydrogenchloride; water / methanol / 25 - 30 °C View Scheme