1: 89 percent / H2O / HgSO4, conc. H2SO4 / acetone / 18 h 2: 1.) KOH, HONH2*HCl / 1.) MeOH, water, 2.) MeOH, water, 21 h, reflux 3: 55 percent / PCl5 / diethyl ether / 20 h / Ambient temperature; adding 0-5 deg C 4: 50 percent H2SO4 / 3 h / 70 - 80 °C View Scheme

hydrogen; palladium on activated charcoal in methanol Ambient temperature;

water T=90°C; 16 h; Inert atmosphereSealed tube;