- 期刊
Neighboring Heteroatom Influence on the Reaction Pathways of Carbon-nucleophile: (η^5-C_5H_5)-addition or CO-addition on [(η^5-C_5H_5)Fe(CO)_2PPh_3^+] by Heteroaromatic Carbanion
相鄰異核原子對碳親核劑反應途徑的影響：異核芳香性碳陰離子對(η^5-C_5H_5)Fe(CO)_2PPh_3^+之(η^5-C_5H_5)或CO的加成
並列摘要
The reaction of heteroaromatic carbanions RLi and (η^5-C_5H_5)Fe(CO)_2l complex in the presence of PPh_3 produces both (η^4-exo-RC_5H_5)Fe(CO)_2 PPh_3, the (η^5-C_5H_5)-ring alkylation product, and (η^5-C_5H_5)Fe(CO)(PPh_3)C(O)R, the CO-addition product. In the past, (η^5-C_5H_5)-ring alkylation was known to be much more favorable than CO-alkylation for common lithiated reagents. The heteroaromatic carbanions used in this study are 2-thiophenyllithium, 3-thiophenyllithium, 2-furanyllithium, 3-furanyllithium, N-methyl-2-pyrrolyllithium, and cyclopentadienyl sodium. The results from this series of fine-tuning experiments indicate that the influence of heteroatom on the neighboring carbon-nucleophile is sufficient to reverse of trend from favoring (η^5-C_5H_5)-addition to favoring CO-addition.
並列關鍵字
無資料延伸閱讀
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