Tricyclic oxonium-directed addition: Regiochemistry and stereochemistry of the electrophilic additions to epoxy cycloalkenols.
作者:Eleuterio Alvarez、Eduardo Manta、Julio D Martin、Matias L Rodriguez、Catalina Ruiz-Perez、Dacil Zurita
DOI:10.1016/s0040-4039(00)87844-2
日期:——
The regio- and stereochemistry of electrophile-promoted transannular ring expansion of cyclo 1,5- and 1,6-epoxyalkenes and cyclo trans-1,5-bisepoxides were studied. The results are rationalized in terms of tricyclic oxonium intermediates showing the directing ability of oxygen substituents in the regio- and stereocontrol observed.