Modular Access to Substituted Azocanes via a Rhodium-Catalyzed Cycloaddition–Fragmentation Strategy
作者:Megan H. Shaw、Rosemary A. Croft、William G. Whittingham、John F. Bower
DOI:10.1021/jacs.5b05215
日期:2015.7.1
A short entry to substituted azocanes by a Rh-catalyzed cycloaddition–fragmentation process is described. Specifically, exposure of diverse N-cyclopropylacrylamides to phosphine-ligated cationic Rh(I) catalyst systems under a CO atmosphere enables the directed generation of rhodacyclopentanone intermediates. Subsequent insertion of the alkene component is followed by fragmentation to give the heterocyclic
描述了通过 Rh 催化的环加成-断裂过程对取代的偶氮烷的简短介绍。具体来说,在 CO 气氛下将不同的 N-环丙基丙烯酰胺暴露于膦配位的阳离子 Rh(I) 催化剂体系可以直接生成罗达环戊酮中间体。随后插入烯烃组分,然后断裂,得到杂环目标。立体化学研究首次表明,烯烃插入到罗达环戊酮中是可逆的。