1: pyridinium chlorochromate; Celite / CH2Cl2 / 20 °C 2: tetrahydrofuran / -78 °C 3: pyridinium chlorochromate; Celite / CH2Cl2 / 20 °C View Scheme

1.1: pyridinium chlorochromate; Celite / CH2Cl2 / 20 °C 2.1: tetrahydrofuran / -78 °C 3.1: pyridinium chlorochromate; Celite / CH2Cl2 / 20 °C 4.1: tetrahydrofuran / -78 °C 4.2: 94 percent / boron trifluoride etherate / CH2Cl2 / 0 °C 5.1: 83 percent / m-chloroperoxybenzoic acid; boron trifluoride etherate View Scheme

[Ir(μ-Cl)(cyclooctene)2]2; 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl; lithium chloride in water; 1,3,5-trimethyl-benzene T=170°C; 24 h; Schlenk techniqueInert atmosphere;