Transformations of pyridiniums derived from amino-alcohols and from diamines : Novel ring closures |
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| Authors: | Alan R. Katritzky Roland T. Langthorne Ranjan C. Patel Gerard Lhommet |
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| Affiliation: | School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, England |
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| Abstract: | Pyridiniums derived from amino alcohols cyclise to ethers or rearrange to aldehydes on heating. Monopyridiniums from diamines can be acylated or converted into ureas or thioureas: these products cyclise on heating in solution to give dihydro-thiazoles, -4H-thiazines, -oxazoles, -4H-oxazines, or tetrahydro-3H-thiazepines. |
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| Keywords: | Present address Department of Chemistry, University of Florida, Gainesville, FL 32611, U.S.A.. |
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