potassium carbonate in dichloromethane Ambient temperature;

1: 170 °C 2: phosphorus (V)-oxide; tetralin 3: palladium View Scheme

acetic acid; platinum Hydrogenation;

1: 88 percent / pyridine / 0 - 20 °C 2: 99 percent / poly(phosphoric acid) / 4 h / 160 - 165 °C 3: 94 percent / phenyl disulfide / 1,2,3,4-tetrahydro-naphthalene / 15 h / 200 - 205 °C 4: 86 percent / 30percent aq. H2O2, glacial AcOH / 30 h / 65 - 70 °C 5: 1.) AcOH, AcONa, 2.) 10percent aq. HCl / 1.) from 80 deg C to 85 deg C, 2 h, 2.) reflux, 1 h 6: 86 percent / pyridine / 0 - 20 °C 7: 49 percent / SeO2 / dioxane / 3 h / Heating 8: aq. HCl / ethanol / Heating View Scheme

1: 12.5 h / 0 °C / |Reflux 2: triethylamine; trichlorophosphate / dichloromethane / 3 h / -10 °C / |Inert atmosphere View Scheme