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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 |
| Institution: | School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, England |
| 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. |
| Keywords: | Present address Department of Chemistry University of Florida Gainesville FL 32611 U S A |
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