The Preparatio and Geometrical Isomerism of Substituted α-Methylthio-cinnamic Acids Part III. Thioketo-Enethiol Tautomerism of β-Aryl-α-thiopyruvic Acids and Geometrical Configuration of 4-Arylidene-1, 3-oxathiolan-5-ones

Motohiro NISHIO; Teiichiro ITO

doi:10.1271/bbb1961.29.1119

Agricultural and Biological Chemistry

Online ISSN : 1881-1280
Print ISSN : 0002-1369
ISSN-L : 0002-1369

The Preparatio and Geometrical Isomerism of Substituted α-Methylthio-cinnamic Acids

Part III. Thioketo-Enethiol Tautomerism of β-Aryl-α-thiopyruvic Acids and Geometrical Configuration of 4-Arylidene-1, 3-oxathiolan-5-ones

Motohiro NISHIO, Teiichiro ITO

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1965 Volume 29 Issue 12 Pages 1119-1122

DOI https://doi.org/10.1271/bbb1961.29.1119

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Abstract

Measurements of NMR spectra of β-aryl-α-thiopyruvic acids revealed that they exist dominantly in the form of trans cinnamic acid configuration. Geometrical configuration of 4-grylidene-1, 3-oxathiolan-5-one was also determined to be trans in regard to aryl and carbonyl groups.

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