bis(tricyclohexylphosphine)benzylidene ruthenium(IV) dichloride in chloroform T=20°C;

1.1: 81.3 percent / Jones reagent / acetone / 0.5 h 2.1: Mg / diethyl ether 2.2: 53.3 percent / CH2Cl2 3.1: BH3 / tetrahydrofuran 3.2: 77.2 percent / NaOH; H2O2 / tetrahydrofuran; H2O / 1 h 4.1: Jones reagent / acetone / 0.5 h / 0 °C 5.1: H2 / Pd/C / acetic acid / 3 h View Scheme