1.1: 82 percent / LiAlH4 / diethyl ether / 0 - 20 °C 2.1: Methylene Blue; oxygen / CH2Cl2 / 0.03 h / 0 °C / Irradiation 2.2: 80 percent / dimethyl sulfide / CH2Cl2 / 20 °C View Scheme

lithium aluminium tetrahydride in diethyl ether T=0 - 20°C;