Iridium-Catalyzed Synthesis of Diaryl Ethers by Means of Chemoselective CF Bond Activation and the Formation of BF Bonds
作者:Jianping Chen、Keyan Zhao、Bingyang Ge、Chongying Xu、Dawei Wang、Yuqiang Ding
DOI:10.1002/asia.201403130
日期:2015.2
Transition‐metal‐catalyzed CF activation, in comparison with CH activation, is more difficult to achieve and therefore less fully understood, mainly because carbon–fluorine bonds are the strongest known single bonds to carbon and have been very difficult to cleave. Transition‐metal complexes are often more effective at cleaving stronger bonds, such as C(sp2)X versus C(sp3)X. Here, the iridium‐catalyzed CF activation
与CH活化相比,过渡金属催化的CF活化更难实现,因此人们对其了解较少,这主要是因为碳-氟键是已知的最强的碳单键,并且很难裂解。 。过渡金属络合物往往在割断更强的键,诸如C(SP更有效2) X与C(SP 3) X.这里,铱催化的Ç fluorarenes F的活化是通过使用双实现(频哪醇)二硼用B的形成F键和自耦合。该策略提供了将氟化物芳族化合物转化为对称的二芳基醚化合物的便捷方法。此外,在保留了CBr和CCl键的情况下,可以高收率获得CF键裂解的化学选择性产物。