tert.-butylhydroperoxide; osmium(VIII) oxide; N-benzyl-trimethylammonium hydroxide in tert-butyl alcohol T=0°C;

1: 50 percent / Pb(OAc)4, Cu(OAc)2, pyridine / benzene / 8 h / Heating 2: 75 percent / t-C4H9-OOH, aq. 40percent Triton B, OsO4 / 2-methyl-propan-2-ol / 0 °C View Scheme

2-Acetoxybenzoyl bromide T=100°C; 2 h; Title compound not separated from byproducts;