1: 75 percent / AlCl3 / CS2 / 0.67 h / 50 °C 2: AlCl3, LiAlH4 / 1,2-dimethoxy-ethane / 0.67 h / Ambient temperature View Scheme

1: 1.) n-butyllithium / 1.) ether, 1,2-dimethoxyethane, -5 deg C, 1 h; 2.) 0 deg C, 5 h 2: 75 percent / AlCl3 / CS2 / 0.67 h / 50 °C 3: AlCl3, LiAlH4 / 1,2-dimethoxy-ethane / 0.67 h / Ambient temperature View Scheme

lithium aluminium tetrahydride; aluminium trichloride in ethylene glycol dimethyl ether 0.666667 h; Ambient temperature; Yield given. Yields of byproduct given. Title compound not separated from byproducts;