Silver tungstate: a single-component bifunctional catalyst for carboxylation of terminal alkynes with CO2 in ambient conditions
Autor: | Bing Yu, Chun-Xiang Guo, Jia-Ning Xie, Liang-Nian He |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Green Chemistry. 17:474-479 |
ISSN: | 1463-9270 1463-9262 |
Popis: | Silver tungstate was successfully developed as a bifunctional catalyst for the ligand-free carboxylation of various terminal alkynes with electron-withdrawing or electron-donating groups under atmospheric pressure of carbon dioxide (CO2) at room temperature. In this protocol, dual activation – i.e., the terminal alkyne activated by silver, and CO2 activation by the tungstate anion – was verified using nuclear magnetic resonance spectroscopy, and means that this reaction can be run under ambient conditions. Notably, this protocol can be applied to the preparation of a phenylacrylate derivative by a cascade reaction using phenylacetylene, CO2 and benzylamine as starting materials. |
Databáze: | OpenAIRE |
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