Zobrazeno 1 - 7 of 7 pro vyhledávání: '"Alessandra G. Cioletti"'
1
An amperometric sensor based on hemin adsorbed on silica gel modified with titanium oxide for electrocatalytic reduction and quantification of artemisinin
Autor: Adriana S. Ribeiro, José Rui M. Reys, Fabiane C. de Abreu, Lauro T. Kubota, Alessandra G. Cioletti, Phabyanno Rodrigues Lima, Marília O. F. Goulart
Publikováno v: Talanta. 77:909-914
The present work describes the development of an amperometric sensor based on hemin immobilized on a titanium oxide modified silica toward detection of artemisinin (ARN) in neutral medium at an applied potential of −0.5 V vs. Ag/AgCl. The sensor pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0715a2d8fd3eb704642646106429f32e
https://doi.org/10.1016/j.talanta.2008.07.043
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2
Unexpected oxidation of a substituted benzo[a]phenazine: oxidative cleavage of a double bond and formation of a macrolactone
Autor: Marília O. F. Goulart, Alessandra G. Cioletti, Carlos A. de Simone, Eduardo E. Castellano, Antonio V. Pinto, Flavio da Silva Emery, Maria do Carmo F. R. Pinto, Kelly C. G. de Moura, José Dias de Souza Filho
Publikováno v: Tetrahedron Letters. 44:3581-3585
— Peroxidation of the phenazine of -lapachone using m -ClC 6 H 4 CO 3 H/CH 2 Cl 2 furnished a macrolactone with a rigid10-membered ring, and the corresponding N-oxide, originating from the oxidative cleavage of the aromatic double bond at thesite o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ab8f4f6fd330d8e724f9a2304f38a463
https://doi.org/10.1016/s0040-4039(03)00605-1
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3
Electrochemical studies of biologically active arylazoxy compounds. The relationship between redox potentials and molluscicidal activities
Autor: Jorge F da Silva Filho, Aldenir Feitosa dos Santos, Roberta Fruttero, Antônio Euzébio Goulart Santana, Maura Vallaro, Francine S. de Paula, Alessandra G. Cioletti, Marília O. F. Goulart
Publikováno v: Journal of Electroanalytical Chemistry. 544:25-34
Six arylazoxy compounds and one arylazo derivative, including calvatic acid were studied by cyclic voltammetry, in protic (aqueous/ethanolic phosphate buffer, pH 6.9) and aprotic (DMF+TBAP) media and submitted to molluscicidal bioassays. In protic me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c276452a3599d389dd9675f34520bb64
https://doi.org/10.1016/s0022-0728(03)00056-1
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4
Mild Selective Hydrolysis of Acetals in Carbohydrates
Autor: Alessandra G. Cioletti, Ricardo José Alves, Josiano Gomes Chaves, Maria Auxiliadora Fontes Prado, José Dias de Souza Filho
Publikováno v: Synthetic Communications. 30:2019-2028
A simple and inexpensive methodology for the selective hydrolysis of acetals using hydrogen chloride as catalyst is described.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e746aa6d31b07350fb3e59870fba88f1
https://doi.org/10.1080/00397910008087251
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6
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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