1: 78 percent / chromium trioxide-pyridine complex / pyridine / 2 h / Ambient temperature 2: 1.) sodium hydride / 1.) DMSO, R.T., 20 min, 2.) R.T. 4 h. View Scheme

1: 75 percent / lithium aluminum hydride / diethyl ether / 3 h / Heating 2: 78 percent / chromium trioxide-pyridine complex / pyridine / 2 h / Ambient temperature 3: 1.) sodium hydride / 1.) DMSO, R.T., 20 min, 2.) R.T. 4 h. View Scheme

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

triethylamine in benzene 6 h; Irradiation;