Synthesis of 1-methyl-, 4-nitro-, 4-amino- and 4-iodo-1,2-dihydro-3H-pyrazol-3-ones
| dc.contributor.author | Fiamegos, Y. C. | en |
| dc.contributor.author | Pilidis, G. A. | en |
| dc.contributor.author | Varvounis, G. | en |
| dc.date.accessioned | 2015-11-24T16:49:12Z | |
| dc.date.available | 2015-11-24T16:49:12Z | |
| dc.identifier.issn | 0022-152X | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9445 | |
| dc.rights | Default Licence | - |
| dc.subject | agents | en |
| dc.title | Synthesis of 1-methyl-, 4-nitro-, 4-amino- and 4-iodo-1,2-dihydro-3H-pyrazol-3-ones | en |
| heal.abstract | 4-Aminopyrazole-3-ones 4b, e, f were prepared from pyrazole-3-ones 1b-d in a four-step reaction sequence. Reaction of the latter with methyl p-toluenesulfonate gave 1-methylpyrazol-3-ones 2b-d. Compounds 2b-d were treated with aqueous nitric acid to give 4-nitropyrazol-3-ones 3b-d. Reduction of compounds 3b-d by catalytic hydrogenation with Pd-C afforded the 4-amino compounds 4b, e, C Using similar reaction conditions, nitropyrazole-3-ones derivatives 2c, d were reduced into aminopyrazole-3-ones 5e, f. 4-lodopyrazole-3-ones 7a, 7c and 8 were prepared from the corresponding pyrazol-3-ones 2a, 2c and 6 and iodine monochloride or sodium azide and iodine monochloride. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://000171704700009 | - |
| heal.identifier.secondary | http://onlinelibrary.wiley.com/store/10.1002/jhet.5570380509/asset/5570380509_ftp.pdf?v=1&t=hmrggkvh&s=d55975fee7cf5a1cb344b53bdf95c7345442a0b3 | - |
| heal.journalName | Journal of Heterocyclic Chemistry | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2001 | - |
| heal.publisher | Wiley-Blackwell | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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