| Autor: |
Yurgevits, I. K., Kupche, É. L., Mikstais, U. Ya. |
| Zdroj: |
Chemistry of Heterocyclic Compounds; July 1979, Vol. 15 Issue: 7 p794-798, 5p |
| Abstrakt: |
The products of the bromination in water of maleic acid monoureide and its methyl ester have the 2-imino-5-bromocarboxy(carbomethoxy)methyl-4-oxazolidone structure. 2-Imino-5-bromocarboxymethyl-4-oxazolidone undergoes dehydrobromination in aprotic polar solvents to give 2-imino-5-carboxymethylidene-4-oxazolidone. In the presence of dry hydrogen chloride in dimethylacetamide the oxazole ring undergoes dehydrobromination and isomerization to an imidazole ring with the formation of 5-carboxymethylidenehydantoin. Methyl a-bromofumarate monoureide is formed when the oxazole ring of 2-imino-5-bromocarbomethoxymethyl-4-oxazolidone is opened with alkali. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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