1: AgO, 30percent HNO3 / acetonitrile 2: 80 percent / dithionite 3: BCl3 / CHCl3; CH2Cl2 / 0.03 h 4: 71 percent / CHCl3; ethyl acetate / 15 h / 5 °C 5: 1) 40percent NaOH, 2) BCl3 / 1) DMSO, 30s, 2) CHCl3, CH2Cl2, 2 min View Scheme

1: AgO, 30percent HNO3 / acetonitrile 2: 80 percent / dithionite 3: BCl3 / CHCl3; CH2Cl2 / 0.03 h View Scheme

1: AgO, 30percent HNO3 / acetonitrile 2: 80 percent / dithionite 4: HI / acetic acid / Heating View Scheme

1: AgO, 30percent HNO3 / acetonitrile 2: 80 percent / dithionite 4: HI / acetic acid / Heating 5: 1N NaOH, O2 / dimethylsulfoxide View Scheme