1: 98 percent / 30percent H2O2 / tetrahydrofuran / 1.5 h / Ambient temperature 2: H2, 10percent NaHCO3 / 5percent Pd/C / ethanol / 10 h / 760.2 Torr / Ambient temperature 3: 1N NaOH / 3 h / Ambient temperature View Scheme

molecular sieve; trimethylsilyl trifluoromethanesulfonate in dichloromethane

1: 66 percent / molecular sieves, TMSOTf, 1,3,5-trimethoxybenzene / CH2Cl2 / -78 °C 2: 63 percent / 3 Angstroem molecular sieves, TMSOTf / CH2Cl2 / 1 h / Ambient temperature View Scheme

1: 98 percent / 30percent H2O2 / tetrahydrofuran / 1.5 h / Ambient temperature 2: H2, 10percent NaHCO3 / 5percent Pd/C / ethanol / 10 h / 760.2 Torr / Ambient temperature 3: 1N NaOH / 3 h / Ambient temperature View Scheme

1: 98 percent / 30percent H2O2 / tetrahydrofuran / 1.5 h / Ambient temperature 2: H2, 10percent NaHCO3 / 5percent Pd/C / ethanol / 10 h / 760.2 Torr / Ambient temperature 3: 1N NaOH / 3 h / Ambient temperature View Scheme