1: 90 percent / red mercuric oxide, mercuric chloride / tetrahydrofuran; H2O / 0.08 h / 0 °C 2: 78 percent / sodium borohydride / ethanol; H2O / 0.5 h / Ambient temperature 3: 94 percent / tetrabutylammonium fluoride / tetrahydrofuran View Scheme

1: 90 percent / red mercuric oxide, mercuric chloride / tetrahydrofuran; H2O / 0.08 h / 0 °C 2: 59 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.12 h View Scheme