Abstract

Abstract1‐5‐benzoxathiepine compounds are a novel class of heterocyclic rings that present interesting properties as central nervous system depressants. With the aim to contribute to the elucidation of the structure‐activity relationship of this class of compounds we report a structural study of the 3‐hydroxy‐1,5‐benzoxathiepine both in solution and in the solid state. Studies by dynamic 13C‐nmr in solution show that three conformations are possible for the oxathiepin ring. A unique chair conformation characterizes the atoms in the oxathiepine ring of the crystallized molecule. The crystal structure was solved by direct methods. Values of bond distances and angles are within the expected range.

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