1: (±)-1,2-O-isopropylidene-myo-inositol With di(n-butyl)tin oxide in methanol; toluene T=130°C; 3 h; 2: benzyl bromide With tetrabutylammomium bromide in toluene T=130°C; 6 h;

1: 21 percent / toluene-p-sulphonic acid * H2O / various solvent(s) / 1 h / 50 °C 2: NaH / dimethylformamide / 20 °C View Scheme