Perthienyl analogues of chichibabin's hydrocarbon. A new stable, highly amphoteric multistage redox system with low oxidation potentials.
摘要:
Perthienyl analogues of Chichibabin's hydrocarbon have been first synthesized as fairly stable substances, showing highly amphoteric multistage redox properties with considerably low oxidation potentials.
Palladium-Catalyzed C−H Homocoupling of Thiophenes: Facile Construction of Bithiophene Structure
摘要:
Palladium-catalyzed C-H homocoupling of thiophene derivatives takes place in the presence of silver(I) fluoride or acetate. A variety of bithiophenes are obtained in good to excellent yields. In particular, the reaction of 2-bromothiophene proceeds at room temperature to afford 5,5'-dibromo-2,2'-bithiophene, where the bromine atom is completely intact in the palladium-catalyzed reaction. XRD analysis reveals that silver fluoride is reduced to silver(0) during the reaction.