Synthesis of macrocyclic enaminolactams by ring expansion reaction of 2-oxocyclododecane-1-carbonitrile with diarylcarbodiimides
作者:Wladislaw Ivancev、Vassil I. Ognyanov、Manfred Hesse
DOI:10.1016/0040-4020(96)00090-7
日期:1996.3
A base promoted ring expansion reaction of 2-oxocyclododecane-1-carbonitrile (6) with several diarylcarbodiimides gives 14-membered α-enaminolactams (12–17), whereas N-alkyl-N′-aryl- and N,N′-dialkylcarbodiimides do not react at all. This new process seems to occur by a similar mechanism as some recently reported analogue reactions of heterocumulenes with cycloalkanones. All relevant molecular structures
碱促进的2-氧代环十二烷-1-腈(6)与数个二芳基碳二亚胺的扩环反应产生14元的α-烯胺内酰胺(12-17),而N-烷基-N'-芳基-和N,N'-二烷基碳二亚胺完全不反应。这一新过程似乎是通过与最近报道的杂多烯酮与环烷酮的类似反应相似的机理发生的。通过X射线分析确认所有相关的分子结构。