1: 9-bora-bicyclo[3.3.1]nonane; dihydrogen peroxide / tetrahydrofuran / 3 h / Inert atmosphere; Cooling with ice 2: tetrabutyl ammonium fluoride / tetrahydrofuran 3: Jone's reagent / water; acetone / 1 h / 0 °C 4: trifluoroacetic acid / dichloromethane / 20 °C 5: trifluoroacetic acid / dichloromethane / 20 °C View Scheme

1: 9-bora-bicyclo[3.3.1]nonane; dihydrogen peroxide / tetrahydrofuran / 3 h / Inert atmosphere; Cooling with ice 2: tetrabutyl ammonium fluoride / tetrahydrofuran 3: Jone's reagent / water; acetone / 1 h / 0 °C 4: trifluoroacetic acid / dichloromethane / 20 °C View Scheme