A theoretical study on the competing mechanisms and regioselectivity of the intermolecular radical anion [2+2] cycloadditions of phenyl vinyl sulfone with enones

A computational investigation into the substituent effect on the chemo- and stereoselectivity of crossed intermolecular radical anion [2 + 2] cycloadditions of enones

The chemoselectivity of cycloaddition is caused by the bulky group on the C atoms which form σ bond in the first step. The stereoselectivity mainly caused by the difference in steric interaction between the trans and cis transition states.