Search Results - "Hurtado, Gabriela R."

Niobium to alcohol mol ratio control of the concurring esterification and etherification reactions promoted by NbCl5 and Al2O3 catalysts under microwave irradiation by BARBOSA, Sandro L, HURTADO, Gabriela R, KLEIN, Stanlei I, JUNIOR, Valdemar L, DABDOUB, Miguel J, GUIMARAES, Carlos F

“…Alcohols and acids can be switched to produce ethers or esters by varying the alcohol to catalyst mol ratio, in a new etherification and esterification method…”
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The preparation of benzyl esters using stoichiometric niobium (V) chloride versus niobium grafted SiO2 catalyst: A comparison study by Barbosa, Sandro L., Lima, Camila D., Almeida, Melina A.R., Mourão, Larissa S., Ottone, Myrlene, Nelson, David L., Klein, Stanlei I., Zanatta, Lucas D., Clososki, Giuliano C., Caires, Franco J., Nassar, Eduardo J., Hurtado, Gabriela R.

“…Two solvent free methods of a one-to-one alcohol/acid mol ratio synthesis of benzyl esters of the formic, acetic, benzoic, salicylic, nicotinic, and oxalic…”
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Solvent free esterification reactions using Lewis acids in solid phase catalysis by Barbosa, Sandro L., Dabdoub, Miguel J., Hurtado, Gabriela R., Klein, Stanlei I., Baroni, Adriano C.M., Cunha, Christielle

“…A clean, efficient and fast method for esterification reactions for sterically (biodiesels) or otherwise inactive (aromatic) precursors was developed, using…”
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Improvement in the synthesis of (Z)-organylthioenynes via hydrothiolation of buta-1,3-diynes: a comparative study using NaOH or TBAOH as base by Santana, Amanda S., Carvalho, Diego B., Casemiro, Nadla S., Hurtado, Gabriela R., Viana, Luiz H., Kassab, Nájla M., Barbosa, Sandro L., Marques, Francisco A., Guerrero, Palimécio G., Baroni, Adriano C.M.

“…Hydrothiolation of symmetrical and unsymmetrical buta-1,3-diynes with sodium organylthiolate anions in reflux, generated in situ by reacting C4H9SH with NaOH,…”
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Synthesis of arotinoid acid and temarotene using mixed (Z)-1,2-bis(organylchalcogene)-1-alkene as precursor by Guerrero, Palimécio G., de Oliveira, Paulo R., Baroni, Adriano C.M., Marques, Francisco A., Labes, Ricardo, Hurtado, Gabriela R., Dabdoub, Miguel J.

“…An efficient and novel total synthesis of the two bioactive retinoids temarotene and arotinoid acid (TTNPB) is described. The key steps in this process include…”
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Synthesis of naturally occurring diene and trienes by Te/Li exchange on (1 Z,3 Z)-butyltelluro-4-methoxy-1,3-butadiene by Dabdoub, Miguel J., Dabdoub, Vânia B., Baroni, Adriano C.M., Hurtado, Gabriela R., Barbosa, Sandro L.

“…(1 Z,3 Z)-Butyltelluro-4-methoxy-1,3-butadiene 2 was obtained by the hydrotelluration of ( Z)-1-methoxy-but-1-en-3-ynes 1. The butadienyllithium 3 obtained by…”
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Biodiesel from waste cooking oil: sodium carbonate modified sand as filter, TLC and the unmodified domestic microwave oven approach by Barbosa, Sandro Luiz, Miranda, Savio Eduardo Oliveira, Barbosa, Bruna Kaicy, Ottone, Myrlene, Klein, Stanlei Ivair, Baroni, Adriano Cesar Morais, Hurtado, Gabriela Ramos

“…Biodiesel is obtained by transesterification of animal and vegetable triglycerides (fats), and have several advantages over fossil fuel, perhaps the most…”
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Synthesis of (Z)-tributylstannyl enynes: systematic studies of Sonogashira cross-coupling reactions between (E)-1-iodovinyl-1-tributylstannanes and terminal acetylenes using amines or tetrabutylammonium hydroxide (TBAOH) as activator by Nazario, Carlos E.D., Santana, Amanda S., Kawasoko, Cristiane Y., Carollo, Carlos A., Hurtado, Gabriela R., Viana, Luiz H., Barbosa, Sandro L., Guerrero, Palimécio G., Marques, Francisco A., Dabdoub, Vânia B., Dabdoub, Miguel J., Baroni, Adriano C.M.

“…Sonogashira cross-coupling reactions involving (E)-iodo vinyl stannanes and terminal acetylenes were carried out in the presence of Pd(PPh3)4, CuI and several…”
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Hydroalumination of silylacetylenes: a novel and highly stereoselective synthesis of (E)-telluro(silyl)ketene acetals and their applications in Sonogashira cross-coupling reactions by Kawasoko, Cristiane Y., Nazario, Carlos E.D., Santana, Amanda S., Viana, Luiz H., Hurtado, Gabriela R., Marques, Francisco A., Frensch, Gustavo, de Oliveira, Paulo R., Guerrero, Palimécio G., Carvalho, Diego B., Baroni, Adriano C.M.

“…The hydroalumination of silylacetylenes with DIBAL-H followed by the addition of n-butyllithium generated in situ the (Z)-β-vinylorganosilane alanates…”
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Synthesis of ( Z)-1-phenylseleno-1,4-diorganyl-1-buten-3-ynes: hydroselenation of symmetrical and unsymmetrical 1,4-diorganyl-1,3-butadiynes by Dabdoub, Miguel J, Baroni, Adriano C.M, Lenardão, Eder J, Gianeti, Thiago R, Hurtado, Gabriela R

“…The hydroselenation of 1-organyl-1,3-butadiynes and 1,4-diorganyl-1,3-butadiynes with the sodium phenylselenolate anion, which was generated in situ by…”
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Synthesis of 3-iodothiophenes via iodocyclization of (Z)-thiobutenynes by Santana, Amanda S., Carvalho, Diego B., Cassemiro, Nadla S., Viana, Luiz H., Hurtado, Gabriela R., Amaral, Marcos S., Kassab, Najla M., Guerrero, Palimécio G., Barbosa, Sandro L., Dabdoub, Miguel J., Baroni, Adriano C.M.

“…A simple synthesis of 3-iodothiophenes was demonstrated using a wide range of (Z)-thioenynes. The key step in the iodocyclofunctionalization was the selective…”
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Corrigendum to: “Synthesis of arotinoid acid and temarotene using mixed (Z)-1,2-bis(organylchalcogene)-1-alkene as precursor” [Tetrahedron Lett. 53 (2012) 5302–5305] by Dabdoub, Miguel J., Dabdoub, Vânia B., Guerrero Jr, Palimécio G., Hurtado, Gabriela R.

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The preparation of benzyl esters using stoichiometric niobium (V) chloride versus niobium grafted SiO 2 catalyst: A comparison study by Barbosa, Sandro L, Lima, Camila D, Almeida, Melina A R, Mourão, Larissa S, Ottone, Myrlene, Nelson, David L, Klein, Stanlei I, Zanatta, Lucas D, Clososki, Giuliano C, Caires, Franco J, Nassar, Eduardo J, Hurtado, Gabriela R

“…Two solvent free methods of a one-to-one alcohol/acid mol ratio synthesis of benzyl esters of the formic, acetic, benzoic, salicylic, nicotinic, and oxalic…”
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Niobium to alcohol mol ratio control of the concurring esterification and etherification reactions promoted by NbCl 5 and Al 2O 3 catalysts under microwave irradiation by Barbosa, Sandro L., Hurtado, Gabriela R., Klein, Stanlei I., Junior, Valdemar L., Dabdoub, Miguel J., Guimarães, Carlos F.

“…Alcohols and acids can be switched to produce ethers or esters by varying the alcohol to catalyst mol ratio, in a new etherification and esterification method…”
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Synthesis and evaluation of anti-leishmania activity of analogs isoxazoles derivatives of grandisin and veraguensin neolignans by Ozildéia Soares, Maria Letícia . F. Silva, João Vitor D. Martins, Gabriela R. Hurtado, Luiz H. Viana, Adriano C. M. Baroni

“…Using the concept of bioisosterismo, the new analogs isoxazole were designed from the molecular modification of grandisin and veraguensin neolignans, which…”
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Electrophilic cyclization of (Z)-thiobutenynes: Synthesis of 3-iodothiophenes by Amanda S. Santana, Diego B. Carvalho, Nadla S. Cassemiro, Gabriela R. Hurtado, Luiz H. Viana, Adriano C. M. Baroni

“…Organic compounds containing the thiophenic structural unit are found in various synthetic compounds useful as agrochemicals, pharmaceuticals and liquid…”
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Synthesis of new triazole arotinoids analogues via "Click Chemistry" with potential anticancer activity by Mariana A. A. Aleixo, Tais M. Garcia, Tatiana C. Bortolo, Diego B. Carvalho, Luiz H. Viana, Gabriela R. Hurtado, Maria F. C. Matos, Adriano C. M. Baroni

“…Retinoids are  a  class  of  natural  and  synthetic  vitamin A analogues structurally related to all-trans-retinoic acid (ATRA). This class of compounds can…”
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