A new synthesis of thioketens is described by the gas-phase thermolysis of the 4- or 5-substituted isothiazoles (1)–(3). It is believed that the reactions may involve thioxocarbenes (8) or thiirens (9) as short-lived intermediates. A scheme for the reaction mechanism is proposed in the light of result of chemical trapping experiments and the activation parameters found.
G. E. Castillo and H. E. Bertorello, J. Chem. Soc., Perkin Trans. 1, 1978, 325 DOI: 10.1039/P19780000325
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