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

抄録

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.