Sodium bromate; cerium (IV) sulfate; sulfuric acid in water; acetonitrile T=80°C; 19 h;

aluminium amalgam in tetrahydrofuran; water 6 h; Heating;

1: 1) n-butyllithium / 1) THF, 0 deg C, 30 min, 2) 0 deg C, THF, 3 h 2: 99 percent / aluminim amalgam / tetrahydrofuran; H2O / 6 h / Heating View Scheme