Abstract
Conformationally and configurationally homogeneous 2α-R1-4α-R2-cis-1-thiadecalins with an equatorial orientation of the substituents attached to the C(2) and C(4) atoms were isolated as the final reduction products in the catalytic hydrogenation on palladium of 2-R1-4-R2-4H(6H)-cyclohexa[b]thiopyrans, cis-3-R1-5-R2-2-thiabicyclo[4.4.0]-δ1,6-decenes, and 2-R1-4-R2-cyclohexa[b]thiopyrylium tetrafluoroborates and trifluoroacetates. cis-3-R1-5-R2-2-Thiabicyclo[4.4.0]-δ1,6-decenes were obtained as intermediates in the incomplete reduction of 2-phenyl- and 2,4-diphenyl-4H-cyclohexa[b]thiopyrans and 2-(4-methoxyphenyl)-4-R2-cyclohexa[b]thiopyrylium salts; 2-R1-4-R2-6H-cyclohexa[b]thiopyrans undergo complete reduction of the double bonds of the heteroring. The hydrogenation products were oxidized to sulfoxides and sulfones.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 614–619, May, 1987.
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Klimenko, S.K., Tyrina, T.I. & Sorokin, N.N. Stereochemical specificity of the palladium-catalyzed hydrogenation of cyclohexa[b]thiopyrans and their derivatives. Chem Heterocycl Compd 23, 506–512 (1987). https://doi.org/10.1007/BF00476376
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DOI: https://doi.org/10.1007/BF00476376