2: 98 percent / LiAlH4 / tetrahydrofuran / 4 h / 25 °C 3: 90 percent / pTsCl / CH2Cl2 / 2 h / 25 °C View Scheme

palladium diacetate; potassium permanganate; lithium aluminium tetrahydride; anhydrous phosphine Yield given. Multistep reaction. Yields of byproduct given;