Study of I-strain relief in the intermediate when forming spiro ketones from unsymmetrical cycloalkylidenecycloalkanes, their dibromides, and their pinacols

Article abstract of DOI:10.1021/jo00081a030

Three unsymmetrical intercyclic olefins, their dibromides, and their pinacols were prepared, each so the two carbons involved at the functional group were part of a different sized ring. The pinacols were reacted with 25% sulfuric acid and with boron trif