pyridine; 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in toluene 5-endo cyclization; 3 h; Syringe pumpReflux;

camphor-10-sulfonic acid; tetra-(n-butyl)ammonium iodide 2 h; Reactivity;

tributyltin chloride; tri-n-butyl-tin hydride in toluene Cyclization; Reduction; Heating; Product distribution; Further Variations:Reagents;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '8127930', constants.ctx, '0')">sodium iodide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '635680', constants.ctx, '0')">acetone</a> <br />T=20&deg;C;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.22 g / triethylamine / toluene / 4 h / 0 &deg;C<br />2: 100 percent / NaI / acetone / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: toluene / 2 h / Heating<br />2: 1.22 g / triethylamine / toluene / 4 h / 0 &deg;C<br />3: 100 percent / NaI / acetone / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: toluene / 2 h / Heating<br />2: 1.22 g / triethylamine / toluene / 4 h / 0 &deg;C<br />3: 100 percent / NaI / acetone / 20 &deg;C<br /> <br /> &nbsp;