A synthon for C2 polycyclic 1,4,5,8-tetrahydronaphthalenes via double Diels–Alder cycloaddition
Abstract
2-Chloro-1,4-benzodithiin-S,S′-tetroxide 1 is a synthon for C2 because its Diels–Alder adducts, after dehydrochlorination, react further with another molecule of diene and the resulting product can be desulfonylated into the same hydrocarbons that would have formed from C2.