Preparation of Imino Lactones by Electrophilic Cyclization of β,γ-Unsaturated Hydroxamates: Formation of 3-Cyanoprop-2-en-1-ones through Fragmentation Reactions
作者:Houssam Trabulsi、Régis Guillot、Gérard Rousseau
DOI:10.1002/ejoc.201000376
日期:2010.10
Treatment of γ-disubstituted β,γ-unsaturatedhydroxamates with bis(collidine)bromine(I) hexafluorophosphate led mainly to the formation of cyclic bromo imidates - the thermodynamic products. Unsaturated cyclic imidates were then obtained by treatment with triethylamine. With γ-aryl β,γ-unsaturatedhydroxamates, the corresponding cyclic bromo imidates were also obtained. On treatment with triethylamine