pyridinium chlorochromate in tetrahydrofuran

BH3; pyridinium chlorochromate in tetrahydrofuran

chromium(VI) oxide in water; acetic acid; propionic acid T=0 - 5°C; 7 h;

methanesulfonic acid 12 h; Ambient temperature;

1: 83.6 percent / AlCl3 / nitrobenzene / 4 h 2: 93 percent / Zn-Hg; aq. HCl / H2O; toluene / 45 h / Heating 3: 57.9 percent / polyphosphoric acid; orthophosphoric acid / 1.5 h / 90 - 95 °C 4: 64.7 percent / hydrazine hydrate; KOH / bis-(2-hydroxy-ethyl) ether / 6 h / Heating 5: 67 percent / CrO3 / acetic acid; propionic acid; H2O / 7 h / 0 - 5 °C View Scheme

1: 64.7 percent / hydrazine hydrate; KOH / bis-(2-hydroxy-ethyl) ether / 6 h / Heating 2: 67 percent / CrO3 / acetic acid; propionic acid; H2O / 7 h / 0 - 5 °C View Scheme

1: 93 percent / Zn-Hg; aq. HCl / H2O; toluene / 45 h / Heating 2: 57.9 percent / polyphosphoric acid; orthophosphoric acid / 1.5 h / 90 - 95 °C 3: 64.7 percent / hydrazine hydrate; KOH / bis-(2-hydroxy-ethyl) ether / 6 h / Heating 4: 67 percent / CrO3 / acetic acid; propionic acid; H2O / 7 h / 0 - 5 °C View Scheme

1: 85 percent / 5percent aq. KOH / 1.5 h / Heating 2: 95 percent / methanesulfonic acid / 12 h / Ambient temperature View Scheme