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Titolo:
Organic azides in heterocyclic synthesis, part 25 - Thermal cyclization of3-acyl-4-azidopyridines to isoxazolo[4,3-c]pyridines
Autore:
Stadlbauer, W; Fiala, W; Fischer, M; Hojas, G;
Indirizzi:
Graz Tech Univ, Dept Organ Chem, A-8010 Graz, Austria Graz Tech Univ Graz Austria A-8010 Dept Organ Chem, A-8010 Graz, Austria
Titolo Testata:
JOURNAL FUR PRAKTISCHE CHEMIE-CHEMIKER-ZEITUNG
fascicolo: 1, volume: 342, anno: 2000,
pagine: 33 - 39
SICI:
0941-1216(2000)342:1<33:OAIHSP>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
RING-CLOSURE; DERIVATIVES;
Keywords:
azides; cyclizations; heterocycles; Beckmann rearrangement; differential scanning calorimetry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Stadlbauer, W Graz Tech Univ, Dept Organ Chem, Heinrichstr 28, A-8010 Graz, Austria Graz Tech Univ Heinrichstr 28 Graz Austria A-8010 , Austria
Citazione:
W. Stadlbauer et al., "Organic azides in heterocyclic synthesis, part 25 - Thermal cyclization of3-acyl-4-azidopyridines to isoxazolo[4,3-c]pyridines", J PRAK CH C, 342(1), 2000, pp. 33-39

Abstract

4-Azidopyridines such as 3-acetyl-4-azido-2-pyridones 3 or 4-azido-3-ethoxycarbonylpyridine 7 with reactive ortho-acyl substituents were obtained from the 4-hydroxy-2-pyridones 1, resp. 5 via 4-tosyloxy-2-pyridones 2 or the 2,4-dichloropyridine 6. DSC-assisted thermolysis of the azides 3 and 7 resulted in electrocyclization and elimination of nitrogen to the isoxazolo[4,3-c]pyridines 4 and 8.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 05:51:45