CO2-Mediated ortho-Lithiation of N-Alkylanilines and Its Use for the Construction of Polymerization Catalysts

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• 作者：Chun Ji Wu ; Sang Hoon Lee ; Seung Tack Yu ; Sung Jae Na ; Hoseop Yun ; Bun Yeoul Lee
• 刊名：Organometallics
• 出版年：2008
• 出版时间：August 11, 2008
• 年：2008
• 卷：27
• 期：15
• 页码：3907-3917
• 全文大小：285K
• 年卷期：v.27,no.15(August 11, 2008)
• ISSN：1520-6041

文摘

The ortho-lithiation of N-alkylanilines is accomplished by the treatment of ^tBuLi with the lithium carbamate compounds generated in situ from N-alkylanilines. The lithiated compounds attack the carbonyl-carbon on 2,3,4,5-tetramethylcyclopentenone, 1-indanone, or 9-fluorenone to yield tertiary alcohols, which are transformed to N-alkylanilines attaching a Me₄C₅, indenyl, or fluorenyl unit at an ortho-position. From the compounds, various o-phenylene-bridged (Me₄C₅, indenyl, or fluorenyl)/amido titanium complexes are prepared in one step. The Me₄C₅/ethylamido titanium complex exhibits a similar catalytic performance to the CGC [Me₂Si(η⁵-Me₄C₅)(N^tBu)]TiCl₂ in ethylene/1-octene copolymerization in terms of activity, molecular weight of the obtained polymer, and 1-octene incorporation.