Reaction of spironaphthalenones with hydroxylamine: Part III. A novel mechanism for the formation of products and trapping of an intermediate.
作者:Tirumalai R. Kasturi、Kaipenchery A. Kumar、Palle V.P. Pragnacharyulu、Gundi Sridevi
DOI:10.1016/s0040-4020(01)80513-5
日期:1993.1
A mechanism involving the intermediacy of nitrene 5, formed from the oxime of spironaphthalenone 1 by acid catalysed dehydration, has been proposed to explain the formation of pyrrolotropones/pyrrolo esters from spironaphthalenones. The initially formed nitrene rearranges to the isopyrrole 6, which either undergoes sigmatropic migration to the pyrrolotropone 2 or adds alcohol to form the pyrrolo ester
已经提出了一种机制,该机制涉及由螺萘酞烯1的肟通过酸催化脱水而形成的腈5的中间体,以解释螺螺萘醌形成吡咯烷酮/吡咯烷酸酯的机理。最初形成的腈重排至异吡咯6,异吡咯6经历σ迁移至吡咯烷酮2或根据1'位置的取代基添加醇形成吡咯酯。异吡咯中间体6已被捕获为狄尔斯-阿尔德加合物8。