Thermal cycloreversion of 4H-1,3-dioxine-4-thiones gives acyl thioketenes as reactive intermediates, trapping of which by nucleophiles provides a general synthesis for β-keto thioic O-acid derivatives.
M. Sato, H. Ban, F. Uehara and C. Kaneko, Chem. Commun., 1996, 775 DOI: 10.1039/CC9960000775
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