Suzuki Cross Coupling
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Palladium Nanoparticles Supported on β-cyclodextrin Functionalised Poly(amido amine)s and their Application in Suzuki-Miyaura Cross-Coupling Reactions
Herein, the synthesis, characterization and catalytic application of an organic-inorganic, palladium (Pd)-containing hybrid material, poly(amidoamine)-cyclodextrin (Pd@PAAs-CD), is reported as an efficient catalyst for Suzuki-Miyaura coupling reactions. The structure of Pd@PAAs-CD was confirmed by Fourier transform infrared spectroscopy (FTIR), transmission
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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2. Suzuki-Miyaura Coupling between 3-Iodolawsone and Arylboronic Acids. Synthesis of Lapachol Analogues with Antineoplastic and Antileishmanial Activities
A series of 2-hydroxy-3-arylnaphthalene-1,4-diones (3-aryllawsones) were synthesized by Suzuki-Miyaura cross coupling reaction of 3-iodolawsone with arylboronic acids/esters. The hydroxylated resulting products were transformed into their corresponding N,N-diethyl carbamates. The antineoplastic and antileishmanial activities of the compounds were evaluated a
J. Braz. Chem. Soc.. Publicado em: 2017-08
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3. PdCl2 Immobilized in Polyacrylamide: a Low Cost and Eco-Friendly Catalyst for Suzuki-Miyaura Reactions
PdCl2 immobilized in polyacrylamide (PAM), named Pd/PAM, produced at an extremely low cost, was found to be an efficient catalyst for Suzuki-Miyaura cross-coupling reactions. Iodo- and bromoarenes may couple with phenylboronic acid under eco-friendly conditions (i.e., phosphine-free and with ethanol as the solvent) to give excellent product yields. Aryl chlo
J. Braz. Chem. Soc.. Publicado em: 2016-04
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4. Palladium Nanoparticles Supported on Poly(
N -vinylpyrrolidone)-Grafted Silica as an Efficient Catalyst for Copper-Free Sonogashira and Suzuki Cross-Coupling ReactionsPalladium catalyst based on polyvinylpyrrolidone-silica hybrid support was prepared and exhibited excellent activity and stability in copper, amine and phosphine-free Sonogashira-Hagihara and Suzuki-Miyaura cross-coupling reactions. The polymeric catalyst was applied efficiently in the coupling reactions of chloro (as well as iodo) and bromoarenes. Elemen
J. Braz. Chem. Soc.. Publicado em: 2015-08
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5. EFFECTS OF SOLVENT, BASE, AND TEMPERATURE IN THE OPTIMISATION OF A NEW CATALYTIC SYSTEM FOR SONOGASHIRA CROSS-COUPLING USING NCP PINCER PALLADACYCLE
The optimisation of a new catalyst system using NCP pincer palladacycle
1 was investigated using the experimental design technique. NCP pincer palladacycle1 was previously investigated in Suzuki-Miyaura and Heck-Mizoroki cross-couplings and found to be a highly efficient catalyst precursor. In this study, the effects of the typeQuím. Nova. Publicado em: 2015-06
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6. Synthesis of Biphenyl Tyrosine Via Cross-Coupling Suzuki-Miyaura Reaction Using Aryltrifluoroborate Salts
We reported a fast and easy method for obtaining biarylic units from tyrosine derivatives via Suzuki-Miyaura cross-coupling using a variety of substituted and unsubstituted potassium aryl- and heteroaryltrifluoroborate salts. The scope of the methodology was also extended to the formation of bis-tyrosine linked dipeptide bonds, leading to biologically intere
J. Braz. Chem. Soc.. Publicado em: 2015-04
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7. Desenvolvimento de reator tipo "dip catalyst" para filmes poliméricos contendo nanopartículas de metais de transição
This article describes the development of a new catalytic reactor designed to operate with nanoparticle-embedded polymer thin films. Stabilization of metal nanoparticles in films that serve as catalysts in organic reactions is relatively new; therefore, the development of reactors to facilitate their use is necessary. We describe in detail the preparation of
Quím. Nova. Publicado em: 2014
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8. Estratégias para estudo das correlações de energia livre em acoplamento aril-aril de Suzuki: elucidando ciclos catalíticos através da equação de Hammett
The present work deals with the study of the correlation of free-energy developed in a catalytic system for Suzuki coupling, by way of the Hammett equation. The system presents NCP pincer palladacycle 1 as a catalyst precursor, which proved to be very efficient in the coupling of various aryl boronic acids with aryl halides in previous studies. Thus, the art
Química Nova. Publicado em: 2012
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9. Funcionalização de cumarinas via reação de acoplamento de Suzuki-Miyaura de sais de organotrifluoroboratos de potássio / Functionalization of coumarins by Suzuki-Miayura cross-Coupling of potassium organotrifluoroborate salts
As cumarinas são compostos com potente atividade biológica. Foi explorada sua funcionalização, iniciando pela sua bromação, gerando o composto 3-bromocumarina, utilizado como material de partida para as reações de acoplamento do tipo Suzuki-Miyaura, que são uma das reações mais empregadas para a formação de ligação carbono-carbono, a qual util
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/04/2011
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10. Aplicações sintéticas do ácido mucobrômico e da 3,4-dibromofuran-2(5H)-ona
This review describes the use of two biomass-derivate butenolides as intermediates in organic synthesis, mucobromic acid and its reduced derivative 3,4-dibromofuran-2(5H)-one. The ambiphilic and ambident character of such butenolides make them versatile starting materials in the synthesis of natural and/or bioactive compounds. Thus, the reactions of mucobrom
Química Nova. Publicado em: 2011
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11. Palladium catalyzed Suzuki cross-coupling of 3-iodo-2-(methylthio)-benzo[b]furan derivatives: synthesis of 3-aryl-2-(methylthio)benzo[b]furans
Neste trabalho desenvolvemos um método seletivo e eficiente para a síntese de derivados de 3-aril-2-(tiometil)-benzo[b]furanos, via reação de acoplamento com ácidos borônicos, catalisada por paládio. As condições reacionais usadas foram brandas e compatíveis com ácidos borônicos contendo substituintes retiradores, doadores de elétrons ou neutros
Journal of the Brazilian Chemical Society. Publicado em: 2010
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12. Pd-catalyzed suzuki cross-coupling reaction of bromostilbene: insights on the nature of the boron species
Sais e ésteres derivados de ácidos aril borônicos podem ser usados na reação de acoplamento Suzuki com (E)-bromoestilbeno usando uma mistura Pd(OAc)2/PPh3 como precursor catalítico. Enquanto que a adição de uma base como KOH é necessária para a reação de acoplamento com ácido borônico ou seu éster derivado do pinacol, o uso de um aril borato d
Publicado em: 2010