1: 95 percent / pyridinium chlorochromate / CH2Cl2 / 3 h / Ambient temperature 2: 0.3 M aq. NaOH, 10 percent aq. H2O2 / 1 h / Ambient temperature View Scheme

1: 21 percent / silver trifluoromethanesulfonate, molecular sieve 3A / CH2Cl2 / 4 h / Ambient temperature 2: 62 percent / 0.1 N NaOH / acetone / 4 h / Ambient temperature View Scheme

pyridinium chlorochromate in dichloromethane 3 h; Ambient temperature;