Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Gerhard Hojas"'
Publikováno v:
Molecules, Vol 6, Iss 4, Pp 338-352 (2001)
The use of malonates such as diethyl malonates 9, (chlorocarbonyl)ketenes 15 and bis(2,4,6-trichlorophenyl) malonates 18 as reagents for cyclocondensation with 1,3-dinucleophiles to give six-membered heterocycles is described. Further attempts to use
Externí odkaz:
https://doaj.org/article/a56c366d934e46c5a500b9a22bc5b7d3
Autor:
Gerhard Hojas, Wolfgang Stadlbauer
Publikováno v:
Journal of Heterocyclic Chemistry. 41:681-690
4-Hydroxy-3-arylhydrazonoalkyl-2-quinolones 6or reactive derivatives such as 3-arylhydrazonoalkyl-4tosyloxy-2-quinolones 7or 4-chloro-3-arylhydrazonoalkyl-2-quinolones 14, which are obtained via3-acyl4-hydroxyquinolones 4,10or 3-phenylaminomethylene-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1799507ba854c4d84316828a475ddfd
https://doi.org/10.1002/jhet.5570410505
https://doi.org/10.1002/jhet.5570410505
Autor:
Wolfgang Stadlbauer, Gerhard Hojas
Publikováno v:
Journal of Heterocyclic Chemistry. 40:753-756
3-Hydroxy-2-[1-(arylhydrazono)ethyl]-1H-phenalen-1-ones 3, obtained from 2-acetyl-3-hydroxy-1H-phenalen-1-one (1) and arylhydrazines 2, cyclize under acidic conditions to 8-methyl-10-aryl-10H-naphtho-[1,8a,8-fg]indazol-7-ones 4. Indazoles 4 are also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bfc2d2f6f6bbba7eebd11b202c5c4ad
https://doi.org/10.1002/jhet.5570400502
https://doi.org/10.1002/jhet.5570400502
Publikováno v:
Journal of Heterocyclic Chemistry. 37:1559-1569
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68efa2aa8ed60b41a20a85d6a287f8c8
https://doi.org/10.1002/jhet.5570370625
https://doi.org/10.1002/jhet.5570370625
Publikováno v:
Journal of Heterocyclic Chemistry. 37:1253-1256
4-Chloro-3-nitro-2-pyridines 3 and 10, obtained from 4-hydroxy-2-pyridones 1 and 8 after nitration and chlorination, gave with sodium azide 4-azido-3-nitropyridines 4 and 11, which cyclized on thermolysis to furoxans 6 and 12. Desoxygenation of the f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62740ff87db648e0218c4e0fc40d8d33
https://doi.org/10.1002/jhet.5570370537
https://doi.org/10.1002/jhet.5570370537
Publikováno v:
Journal für praktische Chemie. 342:33-39
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. 5via 4-tosyloxy-2-pyridones 2 or the 2,4-dichloropyridine 6. DSC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5f671f10aaf0694c0202b158325b927
https://doi.org/10.1002/(sici)1521-3897(200001)342:1<33::aid-prac33>3.0.co
https://doi.org/10.1002/(sici)1521-3897(200001)342:1<33::aid-prac33>3.0.co
Publikováno v:
ChemInform. 32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b1d70b00cc005c70ab495e119d3e573
https://doi.org/10.1002/chin.200123136
https://doi.org/10.1002/chin.200123136
Publikováno v:
ChemInform. 32
1. General Aspects 2. Synthesis of 3-acyl- and 3-formyl quinolines and coumarins 3. Ringclosure reactions to 1-aryl[4,3-c]fused quinolines and coumarins 4. Synthesis of 4-azido-3-hydrazonoacyl-2-quinolones 5. DSC investigations and ring closure react
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::182f70b24fbee85cadf0f1fab453fe6c
https://doi.org/10.1002/chin.200125253
https://doi.org/10.1002/chin.200125253
Autor:
Wolfgang Stadlbauer, Gerhard Hojas
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :3085-3087
The reaction of 3-amino-4-hydrazino-1H-pyrazolo[3,4-b]quinoline 8 with nitrous acid did not give 2,4-diazidoquinoline-3-carbonitrile 5 as reported previously, but afforded in 60% yield 4-azido-3-diazopyrazolo[3,4-b]quinoline 10, which gave by azo cou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1840c16b6c08b803d59ac9f5a5d4d079
https://doi.org/10.1039/b004681g
https://doi.org/10.1039/b004681g
Autor:
Wolfgang Stadlbauer, Gerhard Hojas
Publikováno v:
ChemInform. 35
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3c5d1dd21a44507c70bacbb95c85d67
https://doi.org/10.1002/chin.200411110
https://doi.org/10.1002/chin.200411110