1: 1.) (S,S)-ethylenebis(η5-tetrahydroindenyl)titanium difluoride, PhSiH3, pyrrolidine / tetrahydrofuran; methanol / 6 h / Ambient temperature 2: Et3N / diethyl ether / Ambient temperature View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209320', constants.ctx, '0')">sodium azide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3570983', constants.ctx, '0')">tetrabutylammomium bromide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '610776', constants.ctx, '0')">triphenylphosphine</a> <br />&nbsp;1.) benzene, 80 deg C, 12 h, 2.) overnight;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 4 steps<br /> </b>1: 1.) t-BuLi / 1.) ether, THF, from -78 deg C to -20 deg C, 1 h, 2.) -78 deg C, 1 h<br />2: KHCO₃, Na₂SO₄ / 24 h<br />3: 1.) n-BuLi / 1.) ether, THF, from -78 deg C to -20 deg C, 1 h, 2.) from -78 deg C to 0 deg C<br />4: 95 percent / hydrazine, acetic acid / aq. ethanol / 3 h / 25 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) n-BuLi / 1.) ether, THF, from -78 deg C to -20 deg C, 1 h, 2.) from -78 deg C to 0 deg C<br />2: 95 percent / hydrazine, acetic acid / aq. ethanol / 3 h / 25 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) Mg, I₂ / 1.) Et₂O, reflux, 3 h, 2.) overnight<br />2: 1.) NaN₃, Bu₄NBr, 2.) PPh₃ / 1.) benzene, 80 deg C, 12 h, 2.) overnight<br /> <br /> &nbsp;