Výsledky vyhledávání - "Ana Paula G. Lobato"

Synthesis and crystal structure of the N4-oxide of an hydroxybenzo[f]quinoxalin-6(5H)-one obtained by oxidative cleavage of beta-lapachone-quinoxaline

Autor: Ana Paula G. Lobato, Raphael S. F. Silva, Marília O. F. Goulart, Carlos A. de Simone, Maria do Carmo F. R. Pinto, Antonio V. Pinto, Roohelman Pontes Silva

Publikováno v: Journal of Chemical Crystallography. 36:551-556

The N4-oxide of the 5-(3-hydroxy-3-methylbutyl)-5-hydroxybenzo[f]quinoxalin-6(5H)-one was synthesized from beta-lapachone-quinoxaline by MCPBA oxidation and the crystal structure has been determined (C17H18N2O4), Mr=297.3, a=15.880(5), b=16.998(1), c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::685e934e43bc33795946fb2aaea9cacb
https://doi.org/10.1007/s10870-006-9097-1

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Applications of counter-current chromatography in organic synthesis purification of heterocyclic derivatives of lapachol

Autor: Raphael S. F. Silva, Thiago B. Brum, Gilda Guimarães Leitão, Ana Paula G. Lobato, Antonio V. Pinto, Maria do Carmo F. R. Pinto

Publikováno v: Journal of chromatography. A. 1151(1-2)

This work describes the application of counter-current chromatography (CCC) as a useful, fast and economic alternative for the isolation and purification of heterocyclic derivatives from lapachol and beta-lapachone, two naturally occurring compounds

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bab29501fdc6975b1316c21d46302cf5
https://pubmed.ncbi.nlm.nih.gov/17408681

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The preparation of a 10-membered ring macrolactone by selective ozonolysis and the role of the dihydropyran-substituent on the MCPBA-oxidation reaction profile of beta-lapachone phenazines

Autor: Raphael S. F. Silva, Janaína G. Soares, Alessandra G. Cioletti, Marília O. F. Goulart, Tiago T. Guimarães, Carlos A. de Simone, Antonio V. Pinto, Daniel V. Teixeira, Maria do Carmo F. R. Pinto, Ana Paula G. Lobato

Publikováno v: Journal of the Brazilian Chemical Society, Volume: 16, Issue: 5, Pages: 1074-1077, Published: OCT 2005

The benzophenazine from beta-lapachone was submitted to ozonolysis under conditions that selectively furnished the corresponding rigid macrocyclic lactone 7,7-dimethyl-7,8,9,10-tetrahydro-5H-benzo[3,4]oxecino[5,6-b]quinoxaline-5,10-dione in an yield

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::523f3214f943fd8429cba6c2ea2d87d0
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000600027&lng=en&tlng=en

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