Abstract
By oxidation of (Z)-4,7-dihydro-1,3-dithiepines with meta-chloroperbenzoic acid the corresponding 4,7-dihydro-1λ4,3-dithiepine 1-oxides were synthesized in ∼85% yield. A complete assignment of signals in the 1H and 13C NMR spectra of the compounds obtained was established. According to XRD analysis the seven-membered heterocycles crystallized in conformations chair or boat. The calculations by DFT method in the B3LYP/6-31G(d,p) version showed the possibility of conformational equilibrium of these forms in the gas phase.
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Original Russian Text © A.N. Galyautdinova, R.M. Vafina, O.N. Kataeva, O.A. Lodochnikova, S.G. Gnevashev, O.I. Gnezdilov, V.V. Gavrilov, Yu.G. Shtyrlina, G.A. Chmutova, E.N. Klimovitskii, 2009, published in Zhurnal Organicheskoi Khimii, 2010, Vol. 46, No. 2, pp. 252–257.
For Communication XLVI, see [1].
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Galyautdinova, A.N., Vafina, R.M., Kataeva, O.N. et al. Stereochemistry of seven-membered heterocycles: XLVII. Synthesis, NMR, XRD, and theoretical investigation of monosulfoxides of (Z)-4,7-dihydro-1λ4,3-dithiepine series. Russ J Org Chem 46, 246–251 (2010). https://doi.org/10.1134/S107042801002017X
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DOI: https://doi.org/10.1134/S107042801002017X