1.1: 78 percent / sodium hydrogensulfate; p-hydroquinone; 4-tert-butylcatechol / diethyl ether / 3 h / 200 °C 2.1: BMS / bis-(2-methoxy-ethyl) ether / 3.5 h / 0 - 140 °C 2.2: aq. NaOH; H2O2 / 3 h / 25 - 50 °C View Scheme

1.1: 78 percent / sodium hydrogensulfate; p-hydroquinone; 4-tert-butylcatechol / diethyl ether / 3 h / 200 °C 2.1: BMS / bis-(2-methoxy-ethyl) ether / 3.5 h / 0 - 140 °C 2.2: aq. NaOH; H2O2 / 3 h / 25 - 50 °C 3.1: CrO3; aq. H2SO4 / acetone / 0.5 h / 20 °C 4.1: 80 percent / thionyl chloride / 2 h / Heating View Scheme

3 A molecular sieve; oxygen; caesium carbonate; (R)-H8-1,1'-binaphthalenyl-2,2'-diamine-based Pd(II) in toluene T=80°C; P=760 Torr; 24 h;

palladium(II) dichloride bis[bis(diphenylphosphine)ferrocene]; sodium t-butanolate in 1,4-dioxane T=110°C; 18 h;

1.1: 78 percent / sodium hydrogensulfate; p-hydroquinone; 4-tert-butylcatechol / diethyl ether / 3 h / 200 °C 2.1: BMS / bis-(2-methoxy-ethyl) ether / 3.5 h / 0 - 140 °C 2.2: aq. NaOH; H2O2 / 3 h / 25 - 50 °C 3.1: CrO3; aq. H2SO4 / acetone / 0.5 h / 20 °C View Scheme

1.1: 78 percent / sodium hydrogensulfate; p-hydroquinone; 4-tert-butylcatechol / diethyl ether / 3 h / 200 °C 2.1: BMS / bis-(2-methoxy-ethyl) ether / 3.5 h / 0 - 140 °C 2.2: aq. NaOH; H2O2 / 3 h / 25 - 50 °C 3.1: CrO3; aq. H2SO4 / acetone / 0.5 h / 20 °C 4.1: 80 percent / thionyl chloride / 2 h / Heating 5.1: 88 percent / PdCl2(dppf); 1-butyl-3-methylimidazolium tetrafluoroborate; potassium acetate / 2 h / 100 °C View Scheme