The Behavior of Dimethylamino-Substituted 2,5-Diaryloxazoles and 2,5-Diaryl-1,3,4-oxadiazoles under Vilsmeier—Haack Conditions
Autor: | I. G. Ermolenko, B. M. Krasovitskii, I. A. Fedyunyaeva, Alexander V. Mazepa, O. N. Lyubenko, O. S. Galkina, N. A. Popova, Leonid D. Patsenker |
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Rok vydání: | 2004 |
Předmět: | |
Zdroj: | ChemInform. 35 |
ISSN: | 1522-2667 0931-7597 |
Popis: | It has been shown that dimethylamino-substituted 2,5-diaryloxazoles and 2,5-diaryl-1,3,4-oxadiazoles undergo heterocyclization under Vilsmeier-Haack conditions with the participation of the dimethylamino group to form quinazolinium salts. The oxazole ring can also be formylated at the free 4 position. In alkaline medium the quinazolinium ring is readily hydrolyzed with desalkylation. |
Databáze: | OpenAIRE |
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