Efficient catalysis of Sonogashira reaction by a novel palladium complex with a triptycene incorporated CNC pincer bis-carbene ligands
| Autor: | Wei-Ting Shen, 沈韋廷 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 N-Heterocyclic Carbenes (NHCs) was a stable carbene, which was strong σ-donor character and considered to be of low toxicity. Triptycene was a very rigid structure, and we used triptycene as a ligand to synthesize the stable NHCs 1、2, and make it becomes a palladium (Pd) complex then into use of cross-coupling reactions. We found the ligands 1-di (1) and 2-di (2) are active catalytic ligands which can giving the good results to react with aryl halides and heterocyclic halides then catalyzed the Sonogashira reaction with aryl alkynes. Under different conditions, the ideal yield could up to 99%. We also test the catalytic recycling of 1, and it can be used in 3 to 5 times in different conditions. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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