Issue 6, 2002

Stereochemical and conformational consequences of the oxidation of 1,4-thiazane-3,5-dicarboxylates

Abstract

The stereoselectivity of the oxidation of 1,4-thiazane-3,5-dicarboxylate derivatives to the corresponding sulfoxides and sulfones was found to be dependent on the type of oxidant used and the conformational preference of the substrate. Direct oxidants, such as sodium periodate, peroxides and peracids, preferentially react with the axial sulfur lone-pair, providing the axial S-oxide. Oxidation with bromine–water yielded the epimeric equatorial S-oxide, presumably as a result of initial attack of the axial sulfur lone pair providing the axial bromosulfonium ion, with subsequent displacement of bromide by water leading to the equatorial S-oxide.

Graphical abstract: Stereochemical and conformational consequences of the oxidation of 1,4-thiazane-3,5-dicarboxylates

Supplementary files

Article information

Article type
Paper
Submitted
04 Mar 2002
Accepted
15 Apr 2002
First published
26 Apr 2002

J. Chem. Soc., Perkin Trans. 2, 2002, 1066-1071

Stereochemical and conformational consequences of the oxidation of 1,4-thiazane-3,5-dicarboxylates

C. A. Hutton, R. Jaber, M. Otaegui, J. J. Turner, P. Turner, J. M. White and G. B. Bacskay, J. Chem. Soc., Perkin Trans. 2, 2002, 1066 DOI: 10.1039/B202231A

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