lead(IV) acetate 0.25 h; Ambient temperature;

lead(IV) acetate; trifluoroacetic acid 0.25 h; Ambient temperature;

1: 98 percent / pyridine / 1 h / 70 °C 2: 96.3 percent / H2SO4, conc. aq. HNO3 / 1 h 3: 82.3 percent / 20percent aq. H2SO4 / 2 h / Heating 4: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) / dioxane / 2 h / Heating 5: 96.2 percent / H2 / PtO2 / ethanol; dioxane / 2 h / 760 Torr 6: 1.) 20percent aq. H2SO4, aq. NaNO2, 2.) H2O / 1.) 0-5 deg C, 15 min, 2.) reflux, 1 h View Scheme

lead(IV) acetate 0.25 h; Ambient temperature;

lead(IV) acetate; trifluoroacetic acid 0.25 h; Ambient temperature;

1: 98 percent / pyridine / 1 h / 70 °C 2: 96.3 percent / H2SO4, conc. aq. HNO3 / 1 h 3: 82.3 percent / 20percent aq. H2SO4 / 2 h / Heating 4: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) / dioxane / 2 h / Heating 5: 96.2 percent / H2 / PtO2 / ethanol; dioxane / 2 h / 760 Torr 6: 1.) 20percent aq. H2SO4, aq. NaNO2, 2.) H2O / 1.) 0-5 deg C, 15 min, 2.) reflux, 1 h 7: 87.5 percent / methanol; dioxane; diethyl ether / 1 h / Ambient temperature View Scheme

1: 98 percent / pyridine / 1 h / 70 °C 2: 96.3 percent / H2SO4, conc. aq. HNO3 / 1 h 3: 82.3 percent / 20percent aq. H2SO4 / 2 h / Heating 4: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) / dioxane / 2 h / Heating View Scheme

1: 98 percent / pyridine / 1 h / 70 °C 2: 96.3 percent / H2SO4, conc. aq. HNO3 / 1 h 3: 82.3 percent / 20percent aq. H2SO4 / 2 h / Heating 4: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) / dioxane / 2 h / Heating 5: 96.2 percent / H2 / PtO2 / ethanol; dioxane / 2 h / 760 Torr View Scheme

1: 12 percent / Pb(OAc)4, trifluoroacetic acid / 0.25 h / Ambient temperature 2: 90.6 percent / 30percent aq. H2O2, acetic acid / 3.5 h / 70 - 80 °C View Scheme

&nbsp;(i) aq. HCl, (ii) O₂, Cu(OAc)2, Et₃N, MeOH;&nbsp;&nbsp;Multistep reaction;&nbsp;<br /> &nbsp;