1.1: 70 percent / KOH; tert-butyl hydrogen peroxide / H2O; methanol / 0.5 h 2.1: 0.630 g / diethyl ether / 0.17 h 3.1: zinc; acetic acid / 5 h / 80 °C 3.2: 70 percent / piperidine / 1.5 h / 100 °C 4.1: H2 / Pd/C / methanol / 8 h / 65 °C / 10343 Torr 5.1: aq. HBr / 5 h / Heating 5.2: 78 percent / H2SO4 / methanol / 2 h / Heating View Scheme