AN EXTREMELY EFFICIENT SYNTHESIS OF THIOPHENE 1,1-DIOXIDES. OXIDATION OF THIOPHENE DERIVATIVES WITH DIMETHYLDIOXIRANE

Article abstract of DOI:10.1016/S0040-4039(00)98003-1

Dimethyldioxirane was found to oxidize electron-rich thiophene derivatives, including sterically hindered thiophenophanes, to the corresponding thiophene 1,1 dioxides in excellent yields.Electron-withdrawing groups on a thiophene ring substantially retard