New Titanium Catalysts Containing Tetrazole for Cycloaddition of CO2 to Epoxides

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• 作者：Min Jeong Go ; Kang Mun Lee ; Chang Hwa Oh ; Yi Young Kang ; So Han Kim ; Hyoung Ryun Park ; Youngjo Kim ; Junseong Lee
• 刊名：Organometallics
• 出版年：2013
• 出版时间：August 12, 2013
• 年：2013
• 卷：32
• 期：15
• 页码：4452-4455
• 全文大小：227K
• 年卷期：v.32,no.15(August 12, 2013)
• ISSN：1520-6041

文摘

A series of new half-sandwich titanocene [(畏⁵-C₅H₅)TiLCl₂] (1) and nonorganometallic titanium complexes [TiLCl₃(THF)] (2) and [TiL₂Cl₂] (3) containing 5-(2-hydroxyphenyl)tetrazole (LH) were synthesized in high yield and fully characterized by various spectroscopic methods and X-ray crystallography. In all complexes, the ligand L acted as a monoanionic bidentate ligand and hydrogen bonding between the oxygen of the tetrahydrofuran and hydrogen of the tetrazolyl unit was observed. In the cycloaddition of CO₂ to propylene oxide, complex 3 showed the highest activity among the reported Ti complexes.