Synthesis of 1,3-dioxin-4-ones and their use in synthesis. Part XXIV. A novel synthesis of .BETA.-ketothioesters.

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Abstract
A new general one-pot method for high-yield synthesis of S-alkyl β-ketothioesters by heating of 6-mono- and 5, 6-disubstituted 1, 3-dioxin-4-ones and thiols in an appropriate aprotic solvent is described. This procedure is available for large-scale preparation of a variety of β-ketothioesters.