Preparation and reactions of monocyclic bis(cyclopentadienyl)titanacyclopentenes and -pentadienes
作者:Kimihiko Sato、Yasushi Nishihara、Shouquan Huo、Zhenfeng Xi、Tamotsu Takahashi
DOI:10.1016/s0022-328x(01)01072-5
日期:2001.8
be very effective for the formation of monocyclic titanacyclopentenes in excellent yields. On the other hand, a combination of Cp2TiCl2–2n-BuLi was used for intermolecular coupling of two alkynes to form titanacyclopentadienes in good to excellent yields. A reaction temperature range from −10 to −30 °C was critical for the success of the combinations. Reactions of these in situ-prepared titanacycles
发现Cp 2 TiCl 2 –2EtMgBr的组合对于形成单环钛环戊烯非常有效,并且产率很高。另一方面,将Cp 2 TiCl 2 –2 n -BuLi的组合用于两个炔烃的分子间偶联,形成钛环戊二烯,收率好至极好。-10至-30°C的反应温度范围对于组合的成功至关重要。这些原位制备的钛环化合物的反应显示出与它们的氧化锆环类似物有趣或相似的区别。