| dc.creator | Negri, G | |
| dc.creator | Kascheres, C | |
| dc.date | 2001 | |
| dc.date | JAN-FEB | |
| dc.date | 2014-07-31T14:19:00Z | |
| dc.date | 2015-11-26T16:36:29Z | |
| dc.date | 2014-07-31T14:19:00Z | |
| dc.date | 2015-11-26T16:36:29Z | |
| dc.date.accessioned | 2018-03-28T23:19:14Z | |
| dc.date.available | 2018-03-28T23:19:14Z | |
| dc.identifier | Journal Of Heterocyclic Chemistry. Hetero Corporation, v. 38, n. 1, n. 109, n. 123, 2001. | |
| dc.identifier | 0022-152X | |
| dc.identifier | WOS:000167547400016 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/75349 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/75349 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1271832 | |
| dc.description | The reactions of 4-(methylamino)-3-penten-2-one with diazoketones yielded the alpha -acylenaminoketones 1-3 in good yields. Preparation of the alpha -acylenaminoketone 4 was carried out by treatment of 4-(t-butylamino)-3-penten-2-one with benzoyl chloride being followed by reaction of transamination with methylamine. The reactions were carried out in five different solvents land were submitted to gas chromatography/mass spectrometry analysis, with the goal of obtaining substituted pyrazoles and determining which of the carbonyls would preferentially be attacked by the nucleophile. The reactions of compounds 1-4 with hydrazine reagents led to the formation of the pyrazoles 5-7a-q. Small amounts of 4-methylamino-2-pentenones 10a-q, amides 11a-q and pyrazoles 12a-q were also obtained in these reactions. The unexpected formation of pyrazoles 15d,h,q was detected when methanol and N,N-dimethylformamide were used as solvents in the reactions of alpha -acylenaminoketone 4 with hydrazine reagents. | |
| dc.description | 38 | |
| dc.description | 1 | |
| dc.description | 109 | |
| dc.description | 123 | |
| dc.language | en | |
| dc.publisher | Hetero Corporation | |
| dc.publisher | Odessa | |
| dc.publisher | EUA | |
| dc.relation | Journal Of Heterocyclic Chemistry | |
| dc.relation | J. Heterocycl. Chem. | |
| dc.rights | fechado | |
| dc.source | Web of Science | |
| dc.subject | Versatile Synthesis | |
| dc.subject | Grignard-reagents | |
| dc.subject | Crystal-structure | |
| dc.subject | Enaminones | |
| dc.subject | Derivatives | |
| dc.subject | Am1 | |
| dc.subject | K-10/ultrasound | |
| dc.subject | Pyrazolinones | |
| dc.subject | Annulation | |
| dc.subject | Ketones | |
| dc.title | Study of the reactivity of alpha-acylenaminoketones. Synthesis of pyrazoles | |
| dc.type | Artículos de revistas | |
