1: 97 percent / H2 / Pd-C / ethanol / 25 °C / 760 Torr 2: 75 percent / pyridine / 24 h / 0 °C 3: 96 percent / K2CO3 / methanol / 25 °C 4: 96 percent / pyridine / 1 h / 25 °C 5: 80 percent / dimethyl carbonate, 70percent HClO4 / H2O 6: lead tetraacetate, Na2CO3 / CH2Cl2 / 0.17 h / -40 °C 7: 65 percent / n-butyllithium / tetrahydrofuran; hexamethylphosphoric acid triamide / 1) 1h, -78 deg C, 2) 2.5 h, -78 to 0 deg C 8: 75 percent Spectr. / 1.5M aq. K2CO3 / methanol / 24 h / 55 °C View Scheme

hydrogen; palladium on activated charcoal in ethanol T=25°C; P=760 Torr;