pyridinium chlorochromate 1.) CH2Cl2, RT, 4 h, 2.) THF, RT, 1 h; Yield given. Multistep reaction;

1: 97 percent / Et3N / CH2Cl2 / 3 h 2: 83 percent / RuCl3*3H2O; NaIO4 / acetonitrile; ethyl acetate; H2O / 12 h 3: 80 percent / LiOH / tetrahydrofuran; H2O / 12 h View Scheme