Summary
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1.
The tert-butyl sulfonyl groups in tert-butyl pyridin-2-yl and pyridin-4-yl sulfones are replaced by butyl groups under the action of BuLi predominantly by the AEn mechanism, and in the case of tert-butyl pryidin-4-yl sulfone also partially by the “lithioaryne” mechanisms through the intermediate formation of 5-lithio-3,4-dehydropyridine.
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2.
The replacement of the sulfonyl group in tert-butyl pyridin-4-yl sulfone under the action of DIPA-Li takes place by the “lithioaryne” mechanism.
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For Communication 13, see [1].
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2767–2771, December, 1978.
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Stoyanovich, F.M., Gol'dfarb, Y.L., Marakatkina, M.A. et al. Reactions of arylsulfonyl compounds with an excess of an organolithium reagent 14. The action of organolithium reagents on tert-butyl pyridinyl sulfones. Russ Chem Bull 27, 2469–2473 (1978). https://doi.org/10.1007/BF00941098
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DOI: https://doi.org/10.1007/BF00941098