1: Ti(O-i-Pr)4, Ph2SiH2 / 20 °C 2: 1 M aq. HCl / tetrahydrofuran / 20 °C View Scheme

sodium dimethylaminoborohydride in 1,4-dioxane T=101°C; 67 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

diborane; lithium diisopropyl amide 1.) THF, room temp., 30 min, 2.) THF, -78 deg C, 30 min; room temp., 4 h; Yield given. Multistep reaction;