1: H2 / 5percent Pd/C / methanol / 15 h / 2250.2 Torr 2: 1.) hexamethyldisilazane, trimethylchlorosilane, 2.) LiBH4 / 1.) reflux, 2h, 2.) ether, reflux, 4h 3: 1.) triphenylphosphine, 2.) carbon tetrachloride, pyridine / 1.) DMF, 10 min, 2.) DMF, RT, 1.5 h View Scheme

1: 1.) trimethylchlorosilane, hexamethyldisilazane, 2.) trimethylsilyl triflate / 1.) reflux, 3 h, 2.) CHCl3, RT, 1 h 2: 38 percent / 1N NaOEt / ethanol / Ambient temperature 3: 1.) triphenylphosphine, 2.) carbon tetrachloride, pyridine / 1.) DMF, 10 min, 2.) DMF, RT, 1.5 h View Scheme

1: 1.) trimethylchlorosilane, hexamethyldisilazane, 2.) trimethylsilyl triflate / 1.) reflux, 3 h, 2.) CHCl3, RT, 1 h 2: 38 percent / 1N NaOEt / ethanol / Ambient temperature 3: 1.) triphenylphosphine, 2.) carbon tetrachloride, pyridine / 1.) DMF, 10 min, 2.) DMF, RT, 1.5 h View Scheme

1: 1.) hexamethyldisilazane, trimethylchlorosilane, 2.) LiBH4 / 1.) reflux, 2h, 2.) ether, reflux, 4h 2: 1.) triphenylphosphine, 2.) carbon tetrachloride, pyridine / 1.) DMF, 10 min, 2.) DMF, RT, 1.5 h View Scheme

pyridine; tetrachloromethane; triphenylphosphine 1.) DMF, 10 min, 2.) DMF, RT, 1.5 h; Yield given. Multistep reaction. Yields of byproduct given;