1: CrO3, H2SO4 / acetone 3: aq. NaNO2 / acetic acid View Scheme

chromium(VI) oxide; sulfuric acid in acetone

1: CrO3, H2SO4 / acetone 3: aq. NaNO2 / acetic acid 4: CrO3, H2SO4 / acetone 5: (i) SOCl2, benzene, (ii) /BRN= 102415/, Et3N, Et2O, (iii) /BRN= 1718733/, PhCO2Ag View Scheme

1: CrO3, H2SO4 / acetone 3: aq. NaNO2 / acetic acid 4: CrO3, H2SO4 / acetone 5: (i) SOCl2, benzene, (ii) /BRN= 102415/, Et3N, Et2O, (iii) /BRN= 1718733/, PhCO2Ag 6: aq. NaOH / ethanol / Heating 7: (i) SOCl2, benzene, (ii) /BRN= 605257/, THF View Scheme