Unusual Chemoselective Rh<sup>II</sup>-Catalysed Transformations of α-Diazocarbonyl Piperidine Cores
作者:Andrea Bonetti、Egle Beccalli、Alessandro Caselli、Francesca Clerici、Sara Pellegrino、Maria Luisa Gelmi
DOI:10.1002/chem.201405197
日期:2015.1.19
reactivity of various α‐diazocarbonyl piperidine scaffolds, characterised by an increased molecular complexity, was tested with various RhII catalysts. The structure of the starting reagent is of relevance to the synthetic results. An unexpected dimerisation took place, starting from the simple piperidine scaffold, to give the hexahydrotetrazine ring system. Products derived from a nitrogen ylide intermediate
用各种Rh II催化剂测试了以分子复杂性增加为特征的各种α-重氮羰基哌啶骨架的反应性。起始试剂的结构与合成结果有关。从简单的哌啶骨架开始,发生了意外的二聚反应,得到了六氢四嗪环系统。选自氮叶立德衍生的产物或中间体的芳族取代(1,3,4,5-四氢-2,5- methanobenzo [ C ^ ]吖庚因和1,2,3,3A四氢环戊并[ DE ]异喹啉-4(5H)从四氢异喹啉衍生物获得一个环。反应的化学选择性可以通过选择起始试剂Rh II来控制催化剂和反应条件。最终,发现该zepino杂环可与该催化剂配位以产生新的Rh II配合物。