LiDBB; diphenyldisulfane; diethylphosphinoethane 1.) THF, rt. 16 h; 2.) THF, -60 deg C 15 min, 0 deg C, 16 h; Yield given. Multistep reaction;

<b>Multi-step reaction with 3 steps<br /> </b>1.1: 80 percent / diethyl ether; tetrahydrofuran / 6 h / 20 &deg;C<br />2.1: toluene / 24 h / Heating<br />3.1: Cp₂Zr(H)Cl / CH₂Cl₂ / 20 &deg;C<br />3.2: 52 percent / BF₃*Et₂O / CH₂Cl₂ / 2 h / 0 &deg;C<br /> <br /> &nbsp;