lithium aluminium tetrahydride in diethyl ether T=0 - 20°C; 9 h;

1: 1.) LDA / 1.) THF, hexane, reflux, 12 h, 2.) THF, hexane, reflux, 48 h 2: LiAlH4 / diethyl ether / 9 h / 0 - 20 °C View Scheme