Ren Shikuo, Chan Hoi-Shan, Xie Zuowei
Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People's Republic of China.
J Am Chem Soc. 2009 Mar 25;131(11):3862-3. doi: 10.1021/ja900563u.
A zirconacyclopentene incorporating a carboranyl unit 1,2-[Cp2ZrC(Et)=C(Et)]-1,2-C2B10H10 (1), an analogue of well-known zirconacyclopentadienes, was prepared and fully characterized from the reaction of Cp2Zr(mu-Cl)(mu-C2B10H10)Li(OEt2)2 with EtC OCEt in reflux toluene. Complex 1 resembles zirconacyclopentadienes in some reactions, and on the other hand, it has unique properties of its own. Many carborane derivatives with interesting structural features such as 1-[CI(Et)=C(Et)]-1,2-C2B10H11, naphthalocarborane, and 1,2-[C(Et)=C(Et)]-1,2-C2B10H10 can be conveniently prepared from 1. This work shows that 1 provides a very valuable entry point to the synthesis of various kinds of carborane derivatives that can not be prepared by conventional methods.
一种含有碳硼烷单元的锆环戊烯1,2-[Cp2ZrC(Et)=C(Et)]-1,2-C2B10H10 (1)，它是著名的锆环戊二烯的类似物，通过Cp2Zr(μ-Cl)(μ-C2B10H10)Li(OEt2)2与EtC≡CEt在回流甲苯中的反应制备并得到了全面表征。配合物1在某些反应中类似于锆环戊二烯，另一方面，它有自身独特的性质。许多具有有趣结构特征的碳硼烷衍生物，如1-[CI(Et)=C(Et)]-1,2-C2B10H11、萘并碳硼烷和1,2-[C(Et)=C(Et)]-1,2-C2B10H10，都可以方便地由1制备得到。这项工作表明，1为合成各种无法通过常规方法制备的碳硼烷衍生物提供了一个非常有价值的切入点。
