hydrogen iodide; tetra-(n-butyl)ammonium iodide in toluene reagents mixed and stirred at 0°C for 1 h, washed with aqueous NaHCO3, organic layer treated with aqueous KF; purified by column chromy.;

hydrogen iodide; tetra-(n-butyl)ammonium iodide in toluene reagents mixed and stirred at 0°C for 1 h, washed with aqueous NaHCO3, organic layer treated with aqueous KF; purified by column chromy.;