formic acid T=100 - 110°C; 2 h;

1: 61 percent / 80percent formic acid / 2 h / 100 - 110 °C 2: 93 percent / sodium borohydride / ethanol / 4 h / Ambient temperature 3: tert-butyl hydroperoxide, vanadium oxyacetylacetonate / benzene / 0.75 h / Ambient temperature 4: lithium aluminium hydride / tetrahydrofuran / 4 h 5: 92 percent / triethylamine, sulfur trioxide, pyridine / dimethylsulfoxide / 1 h / Ambient temperature 6: 65 percent / anhyd. AlCl3 / 0.05 h / 180 - 185 °C View Scheme