1.1: BuLi / hexane; tetrahydrofuran / -75 °C 1.2: 53 percent / hexane; tetrahydrofuran / -75 - 0 °C 2.1: 30 percent / HNO3; AcOH / 16 h / 20 °C 3.1: 60 percent / aq. CrO3; H2SO4 / acetone / 0.17 h / -10 °C 4.1: 95 percent / 13 h / 35 - 40 °C 5.1: 49 percent / 22 h / 20 °C 6.1: 37 percent / NaH / dimethylsulfoxide / 20 °C View Scheme

1: 30 percent / HNO3; AcOH / 16 h / 20 °C 2: 60 percent / aq. CrO3; H2SO4 / acetone / 0.17 h / -10 °C 3: 95 percent / 13 h / 35 - 40 °C 4: 49 percent / 22 h / 20 °C 5: 37 percent / NaH / dimethylsulfoxide / 20 °C View Scheme

1: 95 percent / 13 h / 35 - 40 °C 2: 49 percent / 22 h / 20 °C 3: 37 percent / NaH / dimethylsulfoxide / 20 °C View Scheme

1: 60 percent / aq. CrO3; H2SO4 / acetone / 0.17 h / -10 °C 2: 95 percent / 13 h / 35 - 40 °C 3: 49 percent / 22 h / 20 °C 4: 37 percent / NaH / dimethylsulfoxide / 20 °C View Scheme

1: 49 percent / 22 h / 20 °C 2: 37 percent / NaH / dimethylsulfoxide / 20 °C View Scheme

oxygen 0.166667 h; UV-irradiation; Product distributionQuantum yield; Further Variations:wavelength dependence;

oxygen 0.166667 h; UV-irradiation; Product distributionQuantum yield; Further Variations:wavelength dependence;