Striking reactivity of ylide-like germylene toward terminal alkynes: [4+2] cycloaddition versus C-H bond activation |
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Authors: | Yao Shenglai van Wüllen Christoph Driess Matthias |
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Institution: | Technische Universit?t Berlin, Institute of Chemistry: Metalorganics and Inorganic Materials, Sekr. C2, Strasse des 17. Juni 135, Berlin, Germany. |
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Abstract: | The isolable ylide-like N-heterocyclic germylene LGe: (2) {L = CH(C=CH(2))CMe]N(aryl)](2), aryl = 2,6-(i)Pr(2)C(6)H(3)} shows an unprecedented dual reactivity toward terminal alkynes: its reaction with acetylene leads via 4+2] cycloaddition to the novel intramolecular donor stabilised germylene 3, while conversion of phenylacetylene furnishes the analogous cycloadduct 4 along with a C-H bond activation product, the novel N-donor stabilised alkynyl germylene 5. |
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