1: o-ethynylbenzophenone With (THF)W(CO)5 in tetrahydrofuran T=20°C; 24 h; 2: vinyl 1-butyl ether With toluene-4-sulfonic acid in tetrahydrofuran T=20°C; 10 h; Further stages.;

1: o-ethynylbenzophenone With (THF)W(CO)5 in tetrahydrofuran T=20°C; 24 h; 2: isopropylamine in tetrahydrofuran T=0°C; Further stages.;

1: With (THF)W(CO)5 in tetrahydrofuran T=20°C; 24 h; 2: With diethylamine in tetrahydrofuran T=0°C; Further stages.;

1: o-ethynylbenzophenone With (THF)W(CO)5 in tetrahydrofuran T=20°C; 24 h; 2: isopropylamine in tetrahydrofuran T=0°C; Further stages.;

1: o-ethynylbenzophenone With (THF)W(CO)5 in tetrahydrofuran T=20°C; 24 h; 2: diethylamine in tetrahydrofuran T=0°C; Further stages.;

<b>Multi-step reaction with 3 steps<br /> </b>1.1: t-butyllithium / tetrahydrofuran; pentane / 2 h / -78 &deg;C<br />1.2: 84 percent / pentane; tetrahydrofuran / 1 h / -78 &deg;C<br />2.1: 97 percent / n-tetrabutylammonium fluoride / methanol; tetrahydrofuran / 5 h / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: t-butyllithium / tetrahydrofuran; pentane / 2 h / -78 &deg;C<br />1.2: 84 percent / pentane; tetrahydrofuran / 1 h / -78 &deg;C<br />2.1: 97 percent / n-tetrabutylammonium fluoride / methanol; tetrahydrofuran / 5 h / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: pyridine; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 1.5 h / -78 - 0 &deg;C<br />2: copper(l) iodide; tetrakis(triphenylphosphine) palladium⁽⁰⁾; tetrabutylammomium bromide; triethylamine / N,N-dimethyl-formamide / Heating<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11405916', constants.ctx, '0')">copper(l) iodide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '11604118', constants.ctx, '0')">tetrakis(triphenylphosphine) palladium⁽⁰⁾</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3570983', constants.ctx, '0')">tetrabutylammomium bromide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '605283', constants.ctx, '0')">triethylamine</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '605365', constants.ctx, '0')">N,N-dimethyl-formamide</a> <br />&nbsp;Heating;&nbsp;<br /> &nbsp;