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Communication | Regular issue | Vol 41, No. 3, 1995, pp.419-424
Published online, 1st January, 1970
DOI: 10.3987/COM-94-6988
Conformational Preference in Benzyloxy- and Siloxy-substituted Thianes, Thiane 1-Oxides, and Thiane 1,1-Dioxides

Yoshimitsu Nagao*, Michimasa Goto, Kiyoshi Kida, and Motoo Shiro

*Faculty of Pharmaceutical Sciences, The University of Tokushima, Sho-machi, Tokushima 770, Japan


Conformer ratios in 4-benzyloxy- and 4-siloxy-substituted thianes, cis- and trans-thiane 1-oxides, thiane 1,1-dioxides, and dihydrothiines were revealed on the basis of their low temperature 1H nmr analysis. Extreme benzyloxy- and siloxy-axial (or -pseudoaxial) conformer preferences in trans-thiane 1-oxides, thiane 1,1-dioxides, and dihydrothiines were clearly demonstrated.