Oxidative Cyclization Reaction of 2-Aryl-Substituted Cinnamates To Form Phenanthrene Carboxylates by Using MoCl<sub>5</sub>
作者:Kathrin Wehming、Moritz Schubert、Gregor Schnakenburg、Siegfried R. Waldvogel
DOI:10.1002/chem.201403442
日期:2014.9.22
The oxidative cyclization reaction of 2‐aryl cinnamates and derivatives thereof can be easily performed with MoCl5 as the oxidant. This powerful reagent allows oxidative coupling reactions for which other reagents fail. The best results are obtained when the 2‐phenyl substituent of the cinnamate is equipped with two methoxy groups. Even iodo moieties in the bay region of phenanthrene are tolerated
以MoCl 5为氧化剂可以轻松地进行2-芳基肉桂酸酯及其衍生物的氧化环化反应。这种强大的试剂可进行其他试剂无法完成的氧化偶联反应。当肉桂酸酯的2-苯基取代基带有两个甲氧基时,可获得最佳结果。在反应条件下甚至菲的海湾区域中的碘部分也是被容许的。如果涉及萘基,则会发生骨架的重排,从而为高功能化的角芳烃提供了一条优雅的途径。证明了15种底物的环化反应,菲衍生物的分离产率高达99%。反应的广泛范围强调了MoCl 5和MoCl 5的有用性/ TiCl 4中的氧化偶合反应。