chromium(VI) oxide; sulfuric acid in acetone

1: 20 h / 170 - 175 °C 2: CrO3, H2SO4 / acetone View Scheme

2: aq. NaNO2 / acetic acid View Scheme

2: aq. NaNO2 / acetic acid 3: CrO3, H2SO4 / acetone 4: (i) SOCl2, benzene, (ii) /BRN= 102415/, Et3N, Et2O, (iii) /BRN= 1718733/, PhCO2Ag View Scheme

2: aq. NaNO2 / acetic acid 3: CrO3, H2SO4 / acetone 4: (i) SOCl2, benzene, (ii) /BRN= 102415/, Et3N, Et2O, (iii) /BRN= 1718733/, PhCO2Ag 5: aq. NaOH / ethanol / Heating 6: (i) SOCl2, benzene, (ii) /BRN= 605257/, THF View Scheme