sodium; triethylamine 6 h;

1: 92 percent / LiAlH4 / diethyl ether 2: 72 percent / Ph3P / CCl4 / 48 h / Ambient temperature 3: 64 percent / dimethylsulfoxide / 3 h 4: 60 percent / NEt3, Na / 6 h View Scheme

1: 64 percent / dimethylsulfoxide / 3 h 2: 60 percent / NEt3, Na / 6 h View Scheme

1: 72 percent / Ph3P / CCl4 / 48 h / Ambient temperature 2: 64 percent / dimethylsulfoxide / 3 h 3: 60 percent / NEt3, Na / 6 h View Scheme