1: sodium dihydrogenphosphate; sodium chlorite; 2-methyl-but-2-ene / tetrahydrofuran; tert-butyl alcohol; water / 5 h / 20 °C 2: 2,4,6-tri-fluoro-1,3,5-triazine; pyridine 3: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 4: Grubb's 2nd generation catalyst / toluene / 80 °C 5: toluene-4-sulfonic acid / water; acetone / 40 °C 6: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1: boron tribromide / dichloromethane / 1.08 h / 0 °C / Inert atmosphere 2: sodium dihydrogenphosphate; sodium chlorite; 2-methyl-but-2-ene / water; tert-butyl alcohol 3: di-isopropyl azodicarboxylate; triphenylphosphine / toluene / 1.5 h 4: water; 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane / 1 h / 20 °C 5: Grubb's 2nd generation catalyst / dichloromethane / 6 h / 40 °C 6: hydrogenchloride; water / tetrahydrofuran / 20 h View Scheme