Synthesis of Stannaindenyl Anions and a Dianion

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• 作者：Masaichi Saito ; Masakazu Shimosawa ; Michikazu Yoshioka ; Kazuya Ishimura ; and Shigeru Nagase
• 刊名：Organometallics
• 出版年：2006
• 出版时间：June 5, 2006
• 年：2006
• 卷：25
• 期：12
• 页码：2967 - 2971
• 全文大小：104K
• 年卷期：v.25,no.12(June 5, 2006)
• ISSN：1520-6041

文摘

Reduction of 1,1-diphenylstannaindene with excess lithium gave the intermediary 1-phenyl-1-stannaindenyl anion, which was further reduced to provide the 1-stannaindenyl dianion. The remarkableupfield ⁷Li NMR resonance in the dianion and the theoretical calculation suggest that the 1-stannaindenyldianion has considerable aromatic character, as was observed in the sila- and germaindenyl dianions.Reaction of the 1-stannaindenyl dianion with tert-butyl chloride gave the 1-tert-butyl-1-stannaindenylanion, as evidenced by NMR detection as well as a trapping experiment.