bis(trimethylsilyl)-peroxide; dipyridinium dichromate in dichloromethane T=25°C;

bismuth(III) chloride; sodium iodide in dichloromethane T=20°C; 0.25 h;

palladium (II) trifluoroacetate in tetrahydrofuran T=50°C; 8 h;

triphenylphosphine in tetrahydrofuran The mixt. of reagents in THF was stirred for 45 min at -78°C, allowed to warm to room temp. (CO atm.);;; ether was added, complex was filtered, filtrate was washed with water, dried over MgSO4, distilled;;

1: diethyl ether; tetrahydrofuran / 0.5 h / 0 - 20 °C / |Inert atmosphere 2: sodium hydrogencarbonate; Dess-Martin periodane / dichloromethane / 0.33 h / 20 °C View Scheme

dihydrogen peroxide; sodium acetate 1.) THF, 22 deg C, 20 h; Yield given. Multistep reaction;