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 nitrenerearranges to the isopyrrole 6, which either undergoes sigmatropic migration to the pyrrolotropone 2 or adds alcohol to form the pyrrolo ester