T. Thiemann et al., PREPARATION AND ELECTROOXIDATIVE SO-EXTRUSION OF HALOGENATED 7-THIABICYCLO[2.2.1]HEPTENE 7-OXIDES, Journal of chemical research. Synopses (Print), (6), 1998, pp. 346
Halogenated thiophenes have been cycloadded oxidatively to maleimides
to give halogenated thiabicyclo[2.2.1]heptene S-oxides which have been
subjected to an electrochemical extrusion of SO to give various halog
eno-substituted phthalimides.