1.1: 9-bora-bicyclo[3.3.1]nonane / tetrahydrofuran; toluene / 20 h / 20 °C / |Inert atmosphere 1.2: 20 - 50 °C / |Inert atmosphere 2.1: Dess-Martin periodane / dichloromethane / 0.5 h / 20 °C / |Inert atmosphere 3.1: sodium dihydrogen phosphate dihydrate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 2 h / 0 °C / |Inert atmosphere 4.1: hydrogen / water; methanol / 24 h / 20 °C / 3800.26 Torr 4.2: |Inert atmosphere View Scheme