pyridine-SO3 complex in N,N-dimethyl-formamide T=40°C; 0.0833333 h;

1: 94 percent / HCl-Gas / 2 h 2: 67 percent / NaOH / H2O; ethanol / 1 h / Heating 3: 75 percent / 4-dimethylaminopyridine / pyridine / 1 h / 50 - 60 °C 4: 97 percent / 10percent Pd-C / ethanol / Ambient temperature 5: 52 percent / Ag2O, drierite, quinoline 6: 80 percent / Ba(OH)2 / H2O / 24 h / Ambient temperature 7: 39 percent / SO3-pyridine-complex / dimethylformamide / 0.08 h / 40 °C View Scheme

1: 67 percent / NaOH / H2O; ethanol / 1 h / Heating 2: 75 percent / 4-dimethylaminopyridine / pyridine / 1 h / 50 - 60 °C 3: 97 percent / 10percent Pd-C / ethanol / Ambient temperature 4: 52 percent / Ag2O, drierite, quinoline 5: 80 percent / Ba(OH)2 / H2O / 24 h / Ambient temperature 6: 39 percent / SO3-pyridine-complex / dimethylformamide / 0.08 h / 40 °C View Scheme

1: 75 percent / 4-dimethylaminopyridine / pyridine / 1 h / 50 - 60 °C 2: 97 percent / 10percent Pd-C / ethanol / Ambient temperature 3: 52 percent / Ag2O, drierite, quinoline 4: 80 percent / Ba(OH)2 / H2O / 24 h / Ambient temperature 5: 39 percent / SO3-pyridine-complex / dimethylformamide / 0.08 h / 40 °C View Scheme

1: 52 percent / Ag2O, drierite, quinoline 2: 80 percent / Ba(OH)2 / H2O / 24 h / Ambient temperature 3: 39 percent / SO3-pyridine-complex / dimethylformamide / 0.08 h / 40 °C View Scheme

1: 80 percent / Ba(OH)2 / H2O / 24 h / Ambient temperature 2: 39 percent / SO3-pyridine-complex / dimethylformamide / 0.08 h / 40 °C View Scheme