title: Regioselective synthesis of bis(2-halo-3-pyridyl) dichalcogenides (E = S, Se and Te): directed ortho-lithiation of 2-halopyridines.
abstract: A novel method for the preparation of hitherto unknown symmetrical bis(2-halo-3-pyridyl) dichalcogenides (E = S, Se and Te) by the oxidation of intermediate 2-halo-3-pyridyl chalcogenolate, prepared by lithiation of 2-halo pyridines using lithium diisopropylamine is being reported. All the newly synthesized compounds have been characterized through elemental analysis employing various spectroscopic techniques, namely, NMR ((1)H, (13)C, (77)Se), infrared, mass spectrometry, and X-ray crystal structures in representative cases.
authors.affiliation: Department of Chemistry, Panjab University, Chandigarh 160 014, India. kkbhasin@pu.ac.in
authors.forename: K K
authors.initials: KK
authors.lastname: Bhasin
authors.forename: Neelam
authors.initials: N
authors.lastname: Singh
authors.forename: Shivani
authors.initials: S
authors.lastname: Doomra
authors.forename: Ekta
authors.initials: E
authors.lastname: Arora
authors.forename: Ganga
authors.initials: G
authors.lastname: Ram
authors.forename: Sukhjinder
authors.initials: S
authors.lastname: Singh
authors.forename: Yogesh
authors.initials: Y
authors.lastname: Nagpal
authors.forename: S K
authors.initials: SK
authors.lastname: Mehta
authors.forename: T M
authors.initials: TM
authors.lastname: Klapotke