New Ways towards the Cleavage of Non-activated Carbon-Carbon Bonds

在这个项目的第一阶段，我们偶然发现含有强吸电子-B(C6F5)2的硼链烯烃非常稳定，并且很容易通过各种方法从现成的前体形成。在本项目的后续研究中，我们希望利用B(C6F5)2效应，为-B(C6F5)2取代弯曲茂金属的均相齐格勒-纳塔烯烃聚合催化，特别是开发高效和有用的硼砂-威提格烯烃化反应提供便利的途径。首先，初步的例子指出（F5C6）2B=硼砂烯烃将成为酮类、醛类、羧酸酯类和酰胺类的Wittig型烯烃反应的有用试剂。最后，我们将简要探讨我们的（F5C6）2B=硼砂-烯烃方法是否将为制备含有平面四配位碳的稳定化合物铺平新的道路。

In the first phase of this project we found by chance that borata-alkenes containing the strongly electron-withdrawing -B(C6F5)2 were very stable and were easily formed by various means from readily available precursors. In the continuation of the project we want to use the B(C6F5)2 effect for developing convenient ways to the -B(C6F5)2 substituted bent metallocenes for homogeneous Ziegler-Natta olefin polymerization catalysis and especially for developing efficient and useful borata-Wittig olefination reactions. First preliminary examples point out that the (F5C6)2B= borata-alkenes will become very useful reagents for the Wittig type olefination reactions of ketones and aldehydes but also of carboxylic esters and amides. Eventually we will briefly explore whether our (F5C6)2B= borata-alkene methodology will pave new ways toward the preparation of stable examples of compounds containing planar tetracoordinate carbon.