Electrophilic phenylselenenylation of thiophenes. Synthesis of poly(phenylseleno)thiophenes.
摘要:
The phenylselenenyl sulfate, generated from the oxidation of diphenyl diselenide with ammonium persulfate, easily effects electrophilic aromatic substitution reactions on thiophene, 2-and 3-methylthiophenes and on 3-bromothiophene. The phenylseleno group activates the substrate to further substitution. Under controlled experimental conditions, it is thus possible to introduce the desired number of phenylseleno groups into the thiophene ring.
Electrophilic phenylselenenylation of thiophenes. Synthesis of poly(phenylseleno)thiophenes.
摘要:
The phenylselenenyl sulfate, generated from the oxidation of diphenyl diselenide with ammonium persulfate, easily effects electrophilic aromatic substitution reactions on thiophene, 2-and 3-methylthiophenes and on 3-bromothiophene. The phenylseleno group activates the substrate to further substitution. Under controlled experimental conditions, it is thus possible to introduce the desired number of phenylseleno groups into the thiophene ring.