Cycloaddition of Coordinated Diazoalkanes to Ethene To Yield 3<i>H</i>‑Pyrazole Derivatives
- Gabriele Albertin (1647244)
- Stefano Antoniutti (1647241)
- Daniela Baldan (1950424)
- Jesús Castro (1647235)
- Giulia Comparin (1950421)
DOIAbstract
Diazoalkane complexes [Ru(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)(N<sub>2</sub>CAr1Ar2)(PPh<sub>3</sub>)L]BPh<sub>4</sub> (<b>1</b>,<b> 2</b>; Ar1 = Ph, Ar2 = <i>p-</i>tolyl; Ar1Ar2 = C<sub>12</sub>H<sub>8</sub>; L = P(OMe)<sub>3</sub>, P(OEt)<sub>3</sub>) were prepared by allowing compounds RuCl(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)(PPh<sub>3</sub>)L to react with diazoalkane in ethanol. Treatment of complexes <b>1</b> and <b>2</b> with ethylene under mild conditions (1 atm, room temperature) led not only to the ethylene complexes [Ru(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)(η<sup>2</sup>-CH<sub>2</sub>CH<sub>2</sub>)(PPh<sub>3</sub>)L]BPh<sub>4</sub> (<b>5</b>,<b> 6</b>) but also to dipolar (3 + 2) cycloaddition, af...
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