Electrophilic Phenylselenenylation of Thiophenes. Synthesis of Poly(phenylseleno)thiophenes.
The phenylselenenyl sulfate, generated from the oxidation of diphenyl diselenide with ammonium persulfate, easily effects electrophilic aromatic substituttion reactions on thiophene, 2-and 3-methylthiophenes and on 3-bromothiophene.The phenylseleno group