1: dichloromethane / 20 °C / Inert atmosphere 2: dirhodium(II) tetrakis(perfluorobutyrate) / toluene / 15 h / 90 °C / Inert atmosphere; Molecular sieve 3: potassium hydroxide / water / 2 h / 90 °C / Inert atmosphere 4: N,N-dimethyl-formamide / 15 h / 60 °C / Inert atmosphere 5: sodium tetrahydroborate / methanol; water / Inert atmosphere View Scheme

1: dichloromethane / 20 °C / Inert atmosphere 2: dirhodium(II) tetrakis(perfluorobutyrate) / toluene / 15 h / 90 °C / Inert atmosphere; Molecular sieve 3: sodium tetrahydroborate / methanol; water / 20 - 100 °C / Inert atmosphere View Scheme

1: dichloromethane / Inert atmosphere; Reflux 2: ruthenium(III) chloride polyhydrate / isopropanol acetate / 15 h / 80 °C / Inert atmosphere 3: sodium tetrahydroborate / methanol; water / 20 - 100 °C / Inert atmosphere View Scheme