1: 85 percent / pyridine / 6 h / Ambient temperature 2: 78 percent / PPTS / ethanol / 2 h / 55 °C 3: 75 percent / pyridinium dichromate / CH2Cl2 / 6 h / Ambient temperature 4: AgNO3, KOH / ethanol; H2O / 2 h / Ambient temperature 5: diethyl ether / 0.5 h / 0 °C 6: 89 percent / H2, quinoline / Pd-CaCO3 / hexane 7: 65 percent / K2CO3 / methanol; H2O / 12 h / Ambient temperature View Scheme

Multi-step reaction with 2 steps 1: 70 percent / LiNH2 / liquid ammonia / 4 h / -32 °C2: 1.) MnO2 / 1.) CHCl3, 2.) ether  

With  pyridine 6 h;  Ambient temperature;