Zobrazeno 1 - 10
of 796
pro vyhledávání: '"A. Martins"'
Autor:
Maximilian N. Kopylovich, Elisabete C. B. A. Alegria, Nuno M. R. Martins, Luísa M. D. R. S. Martins, Ana P. C. Ribeiro, Armando J. L. Pombeiro
Publikováno v:
ChemInform. 47
This review concerns metal-catalyzed reactions of oxidation of alcohols to the respective products, mainly ketones and aldehydes, mostly within the period of 2010–2014. Both conventional and unconventional systems, not only with usual reagents, but
Autor:
Maria Rosário Martins, Anthony J. Burke, Patrícia Bacalhau, Hugo Viana, Elisabete P. Carreiro, Albertino Goth, Ana Teresa Caldeira
Publikováno v:
ChemInform. 47
We report an efficient methodology for the direct oxidative esterification of primary alcohols to diether-esters using pyridinium chlorochromate (PCC). Numerous studies were carried out to probe the reaction mechanism and at the same time optimize th
Autor:
Nilo Zanatta, Guilherme C. Paveglio, Marcos A. P. Martins, Helio G. Bonacorso, Clarissa P. Frizzo, Leticia V. Rodrigues
Publikováno v:
ChemInform. 47
A simple procedure to obtain 4-acyl-1-substituted-1,2,3-triazoles, using a deep eutectic solvent (DES), ChCl and ethylene glycol at a 1 : 2 ratio, as the reaction medium is described. The products were obtained in high selectivity and good yields (70
Autor:
John N. Low, Ligia R. Gomes, Pedro Marcos Gomes Soares, Alexandra Gaspar, Daniel Martins, Fernanda Borges, Carlos Fernandes
Publikováno v:
ChemInform. 47
The development of new chemical entities represents an important challenge in pharmaceutical industry, being the use of privileged scaffolds for library design and drug discovery a valuable approach. Among the panoply of privileged structures, our re
Autor:
Nilo Zanatta, Andreia M. P. W. da Silva, Marcos A. P. Martins, Helio G. Bonacorso, Fabio M. da Silva, Clarissa P. Frizzo
Publikováno v:
ChemInform. 47
A simple and regioselectively controlled method for the preparation of both 1,4- and 1,6-regioisomers of 1-substituted 4(6)-trifluoromethyl-pyrimidin-2(1H)-ones is described. Both regioisomers were synthesized from the cyclocondensation reaction of 4
Publikováno v:
ChemInform. 47
Ni-catalyzed cross-couplings of aryl, benzyl, and alkyl thiols with aryl and heteroaryl iodides were accomplished in the presence of an Ir-photoredox catalyst. Highly chemoselective C–S cross-coupling was achieved versus competitive C–O and C–N
Autor:
Josiane M. dos Santos, Laura A. Souza, Alessandra S. da Silveira, Helio G. Bonacorso, Marcio M. Lobo, Marcos A. P. Martins, Nilo Zanatta
Publikováno v:
ChemInform. 47
The title pyrimidinones are highly regioselectively obtained by cyclocondensation of trichloro-alkenones with non-symmetric substituted isothiourea sulfates under mild basic conditions.
Autor:
Estefania da C. Aquino, Clarissa P. Frizzo, Marcos A. P. Martins, Helio G. Bonacorso, Guilherme Leonel, Nilo Zanatta, Vanessa C. Gariboti
Publikováno v:
ChemInform. 47
A concise method to synthesize 1-substituted 4-amino-2-(trifluoromethyl)-1H-pyrroles from the heterocyclization reaction of 5-bromo-4-methoxy-1,1,1-trifluoropent-3-en-2-ones with amines is described. This method has the following advantages: it uses
Autor:
Nilo Zanatta, Helio G. Bonacorso, Diones Caeran Bueno, Marcos A. P. Martins, Emily Pansera Waczuk, Yeriah N.A.M. Kader, Letícia B. Silva, Pablo A. Nogara, João Batista Teixeira da Rocha, Fernanda D'Avila da Silva
Publikováno v:
ChemInform. 47
This Letter reports the first series of seven examples of novel 7-amine-spiro[chromeno[4,3-b]quinoline- 6,1′-cycloalkanes], where cycloalkane is cyclopentane, cyclohexane, cycloheptane, 2-methyl-, 3-methyl-, 4-methyl-, and 4-t-butyl-cyclohexane. Th
Publikováno v:
ChemInform. 47
Quaternary gramines were found to be a suitable source of the 3-methylindole fragment for diastereoselective alkylation. The best yields and stereoselectivity were obtained for the alkylation of a chiral William’s morpholinone enolate. Based on thi