1: 78 percent / PPTS / ethanol / 2 h / 55 °C 2: 75 percent / pyridinium dichromate / CH2Cl2 / 6 h / Ambient temperature 3: AgNO3, KOH / ethanol; H2O / 2 h / Ambient temperature 4: diethyl ether / 0.5 h / 0 °C 5: 89 percent / H2, quinoline / Pd-CaCO3 / hexane 6: 65 percent / K2CO3 / methanol; H2O / 12 h / Ambient temperature View Scheme

With  pyridine 6 h;  Ambient temperature;