Intramolecular cationic cyclizations initiated by electrocyclic cleavage of cyclopropanes. Synthesis of trienic cyclopentane derivatives

Article abstract of DOI:10.1016/0040-4039(95)02213-9

The electrocyclic opening of dibromocyclopropane derivatives containing a tethered diene unit provides a good route to trienic cyclopentane derivatives. In one instance a bicyclic product arising from a formal 4 + 2 cycloaddition process was observed.