Výsledky vyhledávání - "Pâmela S. Vargas"

Efficient microwave-assisted synthesis of 1-aryl-4-dimethylamino methyleno-pyrrolidine-2,3,5-triones

Autor: Marcos A. P. Martins, Helio G. Bonacorso, Pâmela S. Vargas, Mariane Rotta, Nilo Zanatta, Clarissa P. Frizzo, Fernanda A. Rosa, Lilian Buriol, Dayse N. Moreira

Publikováno v: Tetrahedron Letters. 53(25):3131-3134

A microwave-assisted synthesis of a series of 1-aryl-4-dimethylaminomethylene pyrrolidine-2,3,5-triones from the cyclocondensation reaction of ethyl 5,5,5-trichloro-3-dimethylamino methylene-2,4-dioxopentanoate with aniline, 3- or 4-substituted anili

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00ddbd3e4182c214713c5ed514c57404

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Ionic liquid effects on the reaction of β-enaminones and tert-butylhydrazine and applications for the synthesis of pyrazoles

Autor: Nilo Zanatta, Fernanda A. Rosa, Dayse N. Moreira, Helio G. Bonacorso, Lilian Buriol, Pâmela S. Vargas, Clarissa P. Frizzo, Marcos A. P. Martins, Mara R. B. Marzari

Publikováno v: Catalysis Communications. 10:1967-1970

In order to evaluate the effect of a series of 10 different ionic liquids ([BMIM][BF4], [BMIM][Br], [OMIM][BF4], [BMIM][PF6], [DBMIM][Br], [DBMIM][BF4], [BMIM][OH], [BMIM][SCN], [HMIM][HSO4] and [HMIM][CF3CO2]) the cyclocondensation reaction between

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::818774082f9f5d1b16690d86f4d1bd15
https://doi.org/10.1016/j.catcom.2009.07.005

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Synthesis of Ethyl Pyrimidine-4-carboxylates from Unsymmetrical Enamino Diketones and Their Application in the First Synthesis of Pyrimido[4,5-d]pyridazin-8(7H)-ones

Autor: Fernanda A. Rosa, Nilo Zanatta, Marcos A. P. Martins, Gabriela F. Fiss, Pablo Machado, Pâmela S. Vargas, Helio G. Bonacorso, Tanize S. Fernandes

Publikováno v: Synthesis. 2008:3639-3648

The reaction of unsymmetrical enamino diketones [RC(O)C(=CNMe 2 )C(O)CO 2 Et,where R = Ph, 4-MeC 6 H 4 ,4-MeOC 6 H 4 , 4-BrC 6 H 4 ,4-ClC 6 H 4 , 4-FC 6 H 4 , 4-O 2 NC 6 H 4 ,2-thienyl, benzofuran-2-yl, and CF 3 ] with N-C-Ndinucleophiles, such as be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8fd158e76decc1f7348cd1170bfebd9a
https://doi.org/10.1055/s-0028-1083202

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Straightforward and Regiospecific Synthesis of Pyrazole-5-carboxylates from Unsymmetrical Enaminodiketones

Autor: Fernanda A. Rosa, Marcos A. P. Martins, Pablo Machado, Helio G. Bonacorso, Nilo Zanatta, Pâmela S. Vargas

Publikováno v: Synlett. 2008:1673-1678

A series of 4-substituted 1 H-pyrazole-5-carboxylates was prepared from the cyclocondensation reaction of unsymmetrical enaminodiketones [RC(O)C(=CNMe 2 )C(O)CO 2 Et, where R = Ph, 4-MeOC 6 H 4 , 4-ClC 6 H 4 , 4-FC 6 H 4 , 4-O 2 NC 6 H 4 , thien-2-yl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4172c010d8454c2e2968d2d3143ee4e8
https://doi.org/10.1055/s-2008-1078482

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N- and C-Acylation in β-Enamino Ketones: Structural Effects on Regiocontrol

Autor: Marcelo Rossatto, Pâmela S. Vargas, Pablo Machado, Fernanda A. Rosa, Marcos A. P. Martins, Helio G. Bonacorso, Nilo Zanatta

Publikováno v: Synlett. 2007:3165-3171

The acylation reaction of secondary (R 1 = H) β-enamino ketones [RCOCH=CHNR 1 R 2 , where R = CF 3 , CCl 3 , Ph, 4-FC 6 H 4 , 4-NO 2 C 6 H 4 , thien-2-yl; R 1 = H, Me; R 2 = Me, Bn, Ph, 4-NO 2 C 6 H 4 ] with trifluoroacetic anhydride or ethyl oxalyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9afab046dc96870473c597f1336ae76c
https://doi.org/10.1055/s-2007-992382

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Microwave-assisted Synthesis of New Ethyl 2-aminopyrimidine- 4-carboxylates

Autor: Marcos A. P. Martins, Pâmela S. Vargas, Nilo Zanatta, Clarissa P. Frizzo, Helio G. Bonacorso

Publikováno v: Proceedings of the 15th Brazilian Meeting on Organic Synthesis Proceedings.

Pyrimidine are heterocyclic compounds which display a wide range of biological activities and thus have been a point of attraction in the eyes of synthetic organic chemists due to their us as potential pharmacophores.1 As part of our growing interest

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::25803f98ae66086a7e8c9bc2bd1b7314
https://doi.org/10.5151/chempro-15bmos-bmos2013_2013914191433

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