Search Results - "Sabino, Adão"

Rhodium(III)-Catalyzed C–H/N–H Alkyne Annulation of Nonsymmetric 2‑Aryl (Benz)imidazole Derivatives: Photophysical and Mechanistic Insights by Dias, Gleiston G, Paz, Esther R. S, Kadooca, Juliana Y, Sabino, Adão A, Cury, Luiz A, Torikai, Kohei, de Simone, Carlos A, Fantuzzi, Felipe, da Silva Júnior, Eufrânio N

“…Rhodium­(III) catalysis enabled C–H/N–H alkyne annulation of nonsymmetric imidazole derivatives. This study encompasses the synthesis of imidazoles from a…”
Get full text

On-Surface Alcohol Oxidation Monitored by Paper Spray Mass Spectrometry: The Role of Ruthenium as Catalyst by Coelho Pimenta, João Victor, Augusti, Rodinei, Sabino, Adão Aparecido

“…Paper spray ionization mass spectrometry (PS-MS) is employed herein as a convenient platform to investigate an on-surface catalytic process, that is, the…”
Get full text

On-surface multicomponent Povarov reaction examined by paper spray mass spectrometry by Coelho Pimenta, João Victor, Sabino, Adão Aparecido, Augusti, Rodinei

“…Povarov multicomponent reaction (MCR) is an acid-catalyzed process that uses three distinct classes of reactants. i. e. an aldehyde, aniline, and activated…”
Get full text

The first example of an on-surface enzymatic reaction evaluated by paper spray mass spectrometry (PS-MS): Deacetylation of 1,2,3,4-tetra-O-acetyl-β-D-xylopyranose by Coelho Pimenta, João Victor, Sabino, Adão Aparecido, Augusti, Rodinei

“…Paper spray mass spectrometry (PS-MS) is a recent and innovative ambient ionization technique conveniently applied to investigate on-surface chemical…”
Get full text

Free radical scavenging and antiproliferative properties of Biginelli adducts by da Silva, Daniel L., Reis, Fabiano S., Muniz, Dandara R., Ruiz, Ana Lúcia T.G., de Carvalho, João E., Sabino, Adão A., Modolo, Luzia V., de Fátima, Ângelo

“…A series of Biginelli adducts bearing different substituents at C-4 position were synthesized by using p-sulfonic acid calix[4]arene as a catalyst. The in…”
Get full text

Fragmenting nanoPutians: Capturing admiration to the rationality, predictability, and beauty of ion chemistry in mass spectrometry By Adão A. Sabino, Stephanie H. Chanteau, João Henrique Astolfi Ferreira, Alicia Camacho Santos, Thiago C. Canevari, James M. Tour and Marcos N. Eberlin by Sabino, Adão A., Maya Chanteau, Stephanie H., Astolfi Ferreira, João Henrique, Santos, Alicia C., Canevari, Thiago C., Tour, James M., Eberlin, Marcos N.

Get full text

Calixarenes as new platforms for drug design by de Fátima, Angelo, Fernandes, Sergio Antonio, Sabino, Adão Aparecido

“…Calixarenes, macrocyclic compounds of phenolic units linked by methylene groups at the 2,6-positions, present some of the requirements to serve as platforms…”
Get more information

Probing the Mechanism of the Heck Reaction with Arene Diazonium Salts by Electrospray Mass and Tandem Mass Spectrometry by Sabino, Adão A., Machado, Angelo H. L., Correia, Carlos Roque D., Eberlin, Marcos N.

“…Key ionic intermediates of the Heck reaction of arene diazonium salts have been intercepted and structurally characterized by ESI‐MS/MS. The use of…”
Get full text

Distonoid ions by TOMAZELA, Daniela Maria, SABINO, Adao A, SPARRAPAN, Regina, GOZZO, Fabio C, EBERLIN, Marcos N

“…By Yates, Bouma, and Radom's definition, distonic radical ions are those formally arising by ionization of diradicals or zwitterionic molecules (including…”
Get full text

Palladium Complexes with Tetradentate Schiff Bases or their Corresponding Amines: Synthesis and Application in Heck Reactions by Andrade, Aretha P. S., Arantes, Lucas M., Kadooca, Juliana Y., Carvalho, Renato L., de Fátima, Ângelo, Sabino, Adão A.

“…This article describes the synthesis of six palladium complexes derived from three bis‐imines or their corresponding amines. These metallic complexes were…”
Get full text

p-Sulfonic acid calixarenes as efficient and reusable organocatalysts for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/-thiones by da Silva, Daniel L., Fernandes, Sergio A., Sabino, Adão A., Fátima, Ângelo de

“…A new and efficient methodology is proposed for obtaining 3,4-dihydropyrimidin-2(1H)-ones/-thiones through Biginelli reactions. It is based on the use of less…”
Get full text

Formation of substituted N-oxide hydroxyquinolines from o-nitrophenyl Baylis–Hillman adduct: a new key intermediate intercepted by ESI-(+)-MS(/MS) monitoring by Amarante, Giovanni W., Benassi, Mario, Sabino, Adão A., Esteves, Pierre M., Coelho, Fernando, Eberlin, Marcos N.

“…Data collected from ESI-(+)-MS(/MS) monitoring and probed by experiments in solution reveals the participation of a new key intermediate ( 4) in the mechanism…”
Get full text

Absolute configuration assignment of ortho, meta, or para isomers by mass spectrometry by Moraes, Luis Alberto B., Sabino, Adão A., Meurer, Eduardo C., Eberlin, Marcos N.

“…A general method based solely on mass spectrometric techniques for the absolute configuration assignment of ortho, meta, or para isomers of acyl nitrobenzenes…”
Get full text

Fragmenting nanoPutians: Capturing admiration to the rationality, predictability, and beauty of ion chemistry in mass spectrometry by Sabino, Adão A., Chanteau, Stephanie H., Henrique Astolfi Ferreira, João, Camacho Santos, Alicia, Canevari, Thiago C., Tour, James M., Eberlin, Marcos N.

“…The fragmentation chemistry of the protonated and ionized nanoPutian 1 has been studied in the gas phase via electrospray ionization and tandem mass…”
Get full text

Ionic Transacetalization with Acylium Ions:  A Class-Selective and Structurally Diagnostic Reaction for Cyclic Acetals Performed under Unique Electrospray and Atmospheric Pressure Chemical Ionization In-Source Ion−Molecule Reaction Conditions by Meurer, Eduardo C, Sabino, Adão A, Eberlin, Marcos N

“…Ionic transacetalization of cyclic acetals with the gaseous (CH3)2NCO+ acylium ion has been performed under unique in-source ion−molecule reaction (in-source…”
Get full text

Electrophilic Aromatic Nitration:  Understanding Its Mechanism and Substituent Effects by Queiroz, Jorge Freire de, Carneiro, José Walkimar de M, Sabino, Adão A, Sparrapan, Regina, Eberlin, Marcos N, Esteves, Pierre M

“…Theoretical calculations and gas-phase mass spectrometric studies were performed for the reaction of the naked (NO2 +) and monosolvated (CH3NO2·NO2 +)…”
Get full text

"Dba-free" palladium intermediates of the Heck-Matsuda reaction by Machado, Angelo H L, Milagre, Humberto M S, Eberlin, Livia S, Sabino, Adão A, Correia, Carlos Roque D, Eberlin, Marcos N

“…The "dba-free" Heck-Matsuda reaction was investigated via direct ESI-MS(/MS) monitoring. Palladium species involved in the reduction of Pd(II) during a Wacker…”
Get more information

Direct infusion electrospray ionization mass spectrometry applied to the detection of forgeries: Roasted coffees adulterated with their husks by Aquino, Francisco J.T., Augusti, Rodinei, Alves, Júnia de O., Diniz, Maria E.R., Morais, Sérgio A.L., Alves, Blyeny H.P., Nascimento, Evandro A., Sabino, Adão A.

“…Recognition of samples of coffee adulterated with their own husks has been a challenging task. The quite similar physical aspect of roasted grinded coffee husk…”
Get full text

Expression, purification and characterization of a novel bZIP protein from sugarcane by Schlögl, Paulo Sérgio, Kobarg, Jörg, Moreau, Vitor Hugo, Leite, Adilson, Sabino, Adão A., Eberlin, Marcos N., Menossi, Marcelo

“…The basic leucine zipper (bZIP) proteins form a large family of transcriptional factors in plants and other eukaryotes. Plant bZIP transcriptional factors are…”
Get full text

Synthesis of Aryl Aldimines and Their Activity against Fungi of Clinical Interest by da Silva, Cleiton M., da Silva, Danielle L., Martins, Cleide V.B., de Resende, Maria A., Dias, Esther S., Magalhães, Thais F.F., Rodrigues, Letícia P., Sabino, Adão A., Alves, Rosemeire B., de Fátima, Ângelo

“…Aldimines are aldehyde‐derived compounds that contain a C=N group. Besides its broad industrial applications, this class of non‐naturally occurring compounds…”
Get full text