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Regioselective Synthesis of Bis(2-halo-3-pyridyl) Dichalcogenides (E = S, Se and Te): Directed Ortho-Lithiation of 2-halopyridines

2007; Hindawi Publishing Corporation; Volume: 2007; Linguagem: Inglês

10.1155/2007/69263

ISSN

1565-3633

Autores

K.K. Bhasin, Neelam Singh, Shivani Doomra, Ekta Arora, Ganga Ram, Sukhjinder Singh, Yogesh Nagpal, S.K. Mehta, Thomas M. Klapötke,

Tópico(s)

Synthesis and Reactivity of Sulfur-Containing Compounds

Resumo

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.

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