1: potassium tert-butylate / tetrahydrofuran / -78 °C 2: diisobutylaluminium hydride / dichloromethane / -78 °C 3: pyridine 4: pyridinium p-toluenesulfonate / ethanol 5: Cornforth reagent / dichloromethane / Molecular sieve 6: sodium chlorite; sodium dihydrogen phosphate dihydrate; 2-methyl-but-2-ene / tert-butyl alcohol 7: tetrakis(triphenylphosphine) palladium(0) / dichloromethane / 20 h / 20 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 1H-imidazole / dichloromethane / 3 h / 20 &deg;C / |Inert atmosphere<br />2: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide; tetrahydrofuran / 1 h / 0 - 20 &deg;C / |Inert atmosphere<br /> <br /> &nbsp;