Chemistry of enediynyl azides: activation through a novel pathway
作者:Amit Basak、Sandip K. Roy、Sanket Das、Amrita B. Hazra、Subhash C. Ghosh、Shailendra Jha
DOI:10.1039/b612114d
日期:——
The spontaneous activation of a nonaromatic enediynyl azide under ambient conditions has been demonstrated. The aromatic enediyne followed the expected cycloaddition with the alkene in the neighbouring arm to form a stable bridged bicyclic enediyne.
Intramolecular 1,3-dipolar nitrone cycloaddition route to bicyclic fused enediyne
作者:Amit Basak、Subhash C. Ghosh
DOI:10.1016/j.tetlet.2005.08.125
日期:2005.10
Bicyclic isooxazolidinyl enediynes 1 and 2 have been prepared by intramolecular nitrone cycloaddition between the two arms of an acyclic enediyne precursor 13. The reaction is highly regioselective and the two configurational isomers have similar onset temperatures for BC indicating no influence of bridgehead stereochemistry on the kinetics of cyclization.