1: LiOH*H2O, 30percent aq. H2O2 / tetrahydrofuran / 5 h 2: 64 percent / n-BuLi / tetrahydrofuran; hexane / 1.) -78 deg C, 30 min, 2.) -78 deg C to 21 deg C, 30 min View Scheme

1: LiOH*H2O, 30percent aq. H2O2 / tetrahydrofuran / 5 h 2: 64 percent / n-BuLi / tetrahydrofuran; hexane / 1.) -78 deg C, 30 min, 2.) -78 deg C to 21 deg C, 30 min View Scheme