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Keywords
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1,3-thiazinium 4-olates, 1,3-oxazinium 4-olates, (chlorocarbonyl)ketenes.
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Abstract
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The stable mesoionic 1,3-thiazinium 4-olates or 1,3-oxazinium 4-olates 3 was synthesis via the condensation of (chlorocarbonyl)ketenes 1 with N-substituted amide and thioamide 2 in a fast and simple procedure. The mesoionic 1,3-thiazinium 4-olates or 1,3-oxazinium 4-olates 3 was isolable as a stable compound, which remained unchanged for at least two weeks at room temperature.
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