Abstract
The [6 + 2] cycloaddition reaction of 2-vinylazetidines with electron-deficient isocyanates such as tosyl isocyanate proceeded smoothly in the absence of the catalyst at room temperature, and various cyclic ureas were isolated in good to high yields. Electron-deficient allenes also reacted with the 2-vinylazetidine, and the corresponding azocine derivatives were isolated.
MeSH terms
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Alkadienes / chemistry
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Azetidines / chemistry*
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Azocines / chemical synthesis
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Azocines / chemistry
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Catalysis
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Cyclization
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Isocyanates / chemistry*
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Molecular Structure
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Temperature
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Tosyl Compounds / chemistry
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Urea / analogs & derivatives*
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Urea / chemical synthesis*
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Urea / chemistry
Substances
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Alkadienes
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Azetidines
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Azocines
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Isocyanates
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Tosyl Compounds
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propadiene
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Urea