boron trifluoride diethyl etherate; mercury(II) oxide in tetrahydrofuran; water 1 h; Ambient temperature;

1: 80 percent / iPr2NEt, NaI / CH2Cl2 / 48 h 2: 80 percent / HgO, BF3*Et2O / tetrahydrofuran; H2O / 1 h / Ambient temperature View Scheme

1: 80 percent / iPr2NEt, NaI / CH2Cl2 / 48 h 2: 80 percent / HgO, BF3*Et2O / tetrahydrofuran; H2O / 1 h / Ambient temperature View Scheme

1: 1) n-BuLi / THF / hexane, 1) 0 deg C / 1h 2) -78 deg C / 30 min 2: 80 percent / diisopropylethylamine / NaI / CH2Cl2 / 48 h / Ambient temperature 3: 77 percent / HgO / BF3*Et2O / tetrahydrofuran; H2O / 1 h View Scheme