1: LiAlH4 / bis-(2-methoxy-ethyl) ether / 1) r.t., 1 h, 2) 80 deg C, 1 h 2: 17 percent / dimethyl ether / 5 h / -40 °C / Irradiation View Scheme

lithium aluminium tetrahydride in diethylene glycol dimethyl ether 1) r.t., 1 h, 2) 80 deg C, 1 h; Yield given. Yields of byproduct given;