Abstract
The optical properties of five epimeric pairs of steroidal episulfides, recently synthesized in the authors' laboratories, have been examined. Optical rotatory dispersion and circular dichroism measurements have demonstrated that the 260 mμ absorption band is optically active, the rotational strength at times differing widely between two epimers. Similar measurements have also been performed with steroidal and sugar trithiocarbonates, the optical activity of the low intensity band near 450 mμ and of the high intensity transition near 315 mμ having been established in each instance. Attention is called to the utility of such trithiocarbonates as “chromophoric” derivatives for olefins in problems of absolute configurational assignments.
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