chromium(VI) oxide - pyridine in pyridine 2 h; Ambient temperature;

1: 75 percent / lithium aluminum hydride / diethyl ether / 3 h / Heating 2: 78 percent / chromium trioxide-pyridine complex / pyridine / 2 h / Ambient temperature View Scheme

sodium hydride 1.) DMSO, R.T., 20 min, 2.) R.T. 4 h.; Yield given. Multistep reaction;

1: 1.) sodium hydride / 1.) DMSO, R.T., 20 min, 2.) R.T. 4 h. 2: 34 percent / triethylamine / benzene / 6 h / Irradiation View Scheme