1.1: boron tribromide / dichloromethane / -78 - 20 °C / Inert atmosphere 2.1: disodium hydrogenphosphate / acetonitrile / 18 h / 20 °C / Inert atmosphere 3.1: potassium carbonate / methanol; dichloromethane / 2 h / Inert atmosphere; Reflux 4.1: diisobutylaluminium hydride / hexane; toluene / -78 - 20 °C / Inert atmosphere 5.1: triphenylphosphine / acetonitrile / 1 h / Inert atmosphere; Reflux 5.2: 9 h / 20 °C / Inert atmosphere; Reflux 6.1: palladium 10 on activated carbon; hydrogen / ethyl acetate / 1 h / 20 °C / 6000.6 Torr 7.1: chromium(VI) oxide; acetic acid / dichloromethane / 42 h / 20 °C / Inert atmosphere View Scheme