title: Iodine-catalysed regioselective thiolation of flavonoids using sulfonyl hydrazides as sulfenylation reagents.
abstract: Iodine-catalysed regioselective sulfenylation of flavonoid derivatives with sulfonyl hydrazides was developed. Various flavonoid thioethers were obtained in moderate to good yield. The thiolation could be conveniently directed to C-8 for flavone, flavonol, dihydroflavone, and isoflavone derivatives or to C-7 for aurone derivatives by employing the isopropyl ethers of flavonoids bearing free OH groups at the C-5 or C-4 positions.
authors.affiliation: College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China. hxxyzhx@mail.tjnu.edu.cn.
authors.forename: Xia
authors.initials: X
authors.lastname: Zhao
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Deng
authors.forename: Aoqi
authors.initials: A
authors.lastname: Wei
authors.forename: Boyang
authors.initials: B
authors.lastname: Li
authors.forename: Kui
authors.initials: K
authors.lastname: Lu