1: 73 percent / NaOMe / methanol / 2 h / -15 °C 2: 87 percent / xylene / 4 h / Heating 3: 85 percent / HCl / methanol / 6 h / Heating 4: 2.) HCl / 1.) CH2Cl2, room temp., 12 h; 2.) 12 h, ether 5: 1.) BBr3; 2.) MeOH, H2SO4 (96percent) / 1.) CH2Cl2, room temp., 140 h; 2.) reflux, 48 h 6: 93 percent / benzoyl t-butyl nitroxide / methanol; CHCl3 / 16 h / Ambient temperature View Scheme

1: aqueous KMnO4 2: H2SO4 View Scheme

1: NaOMe / methanol / -10 °C 2: xylene / Heating 3: HCl / methanol / Heating 4: CH2Cl2 5: 21 percent / BBr3 / CH2Cl2 6: 93 percent / tBuN(O)COPh / CH2Cl2; methanol View Scheme

1: NaOMe / methanol / -10 °C 2: xylene / Heating View Scheme

1: KOH; aqueous ethanol 2: pyridine hydrochloride / 200 °C / anschliessend Behandeln mit Wasser View Scheme

1: KOH; aqueous ethanol 2: pyridine hydrochloride / 200 °C / anschliessend Behandeln mit Wasser 3: chlorobenzene / Einleiten von Chlorwasserstoff und Erhitzen des entstandenen Hydrochlorids mit Phosgen View Scheme

Multi-step reaction with 3 steps 1: NaOMe / methanol / -10 °C2: xylene / Heating3: HCl / methanol / Heating