Gabriel Abranches Dias Castro

Universidade Federal de Viçosa

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Sérgio Antônio Fernandes

Universidade Federal de Viçosa

Larissa Lorrane Rodrigues Borges

Universidade Federal de Viçosa

Paulo César Stringheta

Universidade Federal de Viçosa

Valdeir Viana Freitas

Universidade Federal de Viçosa

Daniela Margarita Echeverri Delgadillo

Universidade Federal de Viçosa

Márcia Cristina Teixeira Ribeiro Vidigal

Universidade Federal de Viçosa

Márcio José da Silva

Universidade Federal de Viçosa

Marcelo Henrique dos Santos

Universidade Federal de Viçosa

Amanda Laís Alves Almeida Nascimento

Universidade Federal de Viçosa

Valdemar Lacerda

Universidade Federal do Espírito Santo

Cooperative Institutions

Universidade Federal de Viçosa

Universidade Federal de Minas Gerais

Consejo Nacional de Investigaciones Científicas y Técnicas

Universidade Estadual de Campinas (UNICAMP)

Universidade Federal do Espírito Santo

Departamento de Ciência e Tecnologia

Universidad Nacional de La Plata

Centro de Investigación y Desarrollo en Criotecnología de Alimentos

Universidade de São Paulo

Division of Chemistry

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Influence of spontaneous and inoculated fermentation of açai on simulated digestion, antioxidant capacity and cytotoxic activity

Food Research International (2023)

Amanda Laís Alves Almeida Nascimento Mariane Sampaio da Silveira de Souza Larissa Lorrane Rodrigues Borges Monique Renon Eller Frederico Augusto Ribeiro de Barros

Trolox

10.1016/j.foodres.2023.113222

Cite

Citations (3)

Conversion of Glucose to 5-Hydroxymethylfurfural Using Consortium Catalyst in a Biphasic System and Mechanistic Insights

Catalysts (2023)

Geraldo Ferreira David Daniela Margarita Echeverri Delgadillo Gabriel Abranches Dias Castro Diana Catalina Cubides-Román Sérgio Antônio Fernandes

We found an effective catalytic consortium capable of converting glucose to 5-hydroxymethylfurfural (HMF) in high yields (50%). The reaction consists of a consortium of a Lewis acid (NbCl5) and a Brønsted acid (p-sulfonic acid calix[4]arene (CX4SO3H)), in a microwave-assisted reactor and in a biphasic system. The best result for the conversion of glucose to HMF (yield of 50%) was obtained with CX4SO3H/NbCl5 (5 wt%/7.5 wt%), using water/NaCl and MIBK (1:3), at 150 °C, for 17.5 min. The consortium catalyst recycling was tested, allowing its reuse for up to seven times, while maintaining the HMF yield constant. Additionally, it proposed a catalytic cycle by converting glucose to HMF, highlighting the following two key points: the isomerization of glucose into fructose, in the presence of Lewis acid (NbCl5), and the conversion of fructose into HMF, in the presence of CX4SO3H/NbCl5. A mechanism for the conversion of glucose to HMF was proposed and validated.

5-hydroxymethylfurfural

Sulfonic acid

10.3390/catal13030574

Cite

Citations (2)

One-Pot Tandem Synthesis of 5-Ethoxymethylfurfural as a Potential Biofuel

SSRN Electronic Journal (2021)

Gabriel Abranches Dias Castro Sérgio Antônio Fernandes

5-ethoxymethylfurfural (EMF) is a potential biofuel that can be obtained from the etherification of 5-hydroxymethylfurfural. In this work, a green methodology was developed to produce this product through a one-pot tandem reaction, starting directly from fructose, eliminating unnecessary process steps and the isolation of intermediates. For this, heating by microwave irradiation and p-sulfonic acid calix[4]arene (CX4SO3H) as organocatalyst were used. EMF was obtained in 88% yield by heating a mixture of ethanol, fructose and CX4SO3H (1.0 mol%) at 140 °C for 20 min. In addition, we can highlight other advantages of the developed methodology, such as (i) use of non-toxic catalyst, (ii) short reaction time, (iii) efficient heating system, (iv) metal-free process, (v) formation of two π bonds C-C and one C-O in sequence, (vi) water as a sole waste and (vii) process according to green chemistry.

Tandem

10.2139/ssrn.3982981

Cite

Citations (0)

Green synthesis of 5-hydroxymethylfurfural and 5-acetoxymethylfurfural using a deep eutectic solvent in a biphasic system assisted by microwaves

Reaction Chemistry & Engineering (2023)

Gabriel Abranches Dias Castro Sérgio Antônio Fernandes Rita de Cássia Superbi de Sousa Matheus M. Pereira

The fructose was subjected to a dehydration reaction to produce 5-hydroxymethylfurfural using a deep eutectic solvent composed of choline chloride, fructose, water as the third component of the mixture and p -sulfonic acid calix[4]arene as an organocatalyst.

Choline chloride

Deep eutectic solvent

5-hydroxymethylfurfural

Sulfonic acid

Hydroxymethylfurfural

10.1039/d2re00399f

Cite

Citations (7)

Síntese de produtos para química fina a partir de compostos modelo provenientes da biomassa

Gabriel Abranches Dias Castro

Diante das previsões de esgotamento dos recursos fósseis e os problemas ambientais causados pela queima de combustíveis, é cada vez mais urgente substituir esses materiais por matérias- primas de fonte renovável. Diante disso, a biomassa é apresentada como a melhor solução, uma vez que ela é uma fonte sustentável, limpa e abundante para obtenção de energia e de carbono orgânico. Para isso, foi estabelecida a biorrefinaria, que é uma unidade industrial com finalidade de transformar biomassa renovável, e materiais advindos dela, em biocombustíveis, plataformas, insumos químicos e energia. Essa alternativa, tem movido inúmeras pesquisas na área acadêmica e industrial. Porém, para isso é fundamental desenvolver metodologias envolvendo catálise, uma vez que os catalisadores tornam as transformações mais seletivas, rápidas e eficazes. Nesse contexto, os organocatalisadores derivados dos calix[n]arenos chamam atenção, uma vez que foram pouco explorados e tem inúmeras qualidades, como ser reciclável, não ser corrosivo, ser de baixa volatilidade e apresentar baixa toxicidade. Dessa forma, este trabalho objetivou produzir a plataforma química 5-hidroximetilfurfural (HMF), potenciais biocombustíveis, aditivos de combustíveis e insumos químicos a partir de moléculas modelos derivadas da biomassa, empregando o ácido p-sulfônico calix[4]areno como catalisador em todas transformações químicas. Foi possível converter a frutose em HMF empregando dois sistemas distintos – um sistema bifásico constituído por solução aquosa saturada com NaCl e acetato de etila, e outro constituído por solvente eutético profundo e acetato de etila – com 74% e 90% de rendimento, respectivamente. Outra vertente do trabalho foi a conversão em tandem da frutose em 5-etoximetilfurfural, com 88% de rendimento. Além disso, foi desenvolvida uma metodologia verde para a síntese de dez ésteres levulínicos, obtidos em rendimentos que variaram de 13 a 99%. Por fim, foram sintetizados acetais derivados do glicerol, como potenciais aditivos de combustíveis, com rendimentos totais entre 6 e 99%. Em suma, foi possível desenvolver metodologias verdes, sustentáveis e rápidas, para síntese de produtos para química fina, com bons rendimentos e que trazem oportunidades para biorrefinaria. Palavras-chave: Organocatálise. 5-hidroximetilfurfural. Calixarenos. Frutose. Ácido levulínico. Glicerol. Química verde.

10.47328/ufvbbt.2022.099

Cite

Citations (0)

Copper Phosphotungstate-Catalyzed Microwave-Assisted Synthesis of 5-Hydroxymethylfurfural In A Biphasic System

Research Square (Research Square) (2021)

Gabriel Abranches Dias Castro Neide Paloma Gonçalves Lopes Sérgio Antônio Fernandes Márcio José da Silva

Abstract In this paper, we have described a novel route to produce 5-hydroxymethylfurfural (HMF), a valuable platform-molecule obtained from biomass, using transition metal-exchanged Keggin heteropolyacid salts as catalysts, in microwave-assisted reactions carried out in a water-ethyl acetate biphasic system. To avoid the use of homogenous Brønsted acid catalysts, which are corrosive and difficult to be reused, we have exchanged the protons of the Keggin heteropolyacids by transition metal cations. These salts were evaluated in the fructose dehydration, being the Cu 3/2 PW 12 O 40 the most active and selective catalyst, achieving 81 % of HMF yield, after 15 min reaction at 413 K under microwave irradiation (MWI). The effects of metal cation, anion, and heteropolyanion present in the catalyst were evaluated. The greatest efficiency of Cu 3/2 PW 12 O 40 was attributed to its high Lewis acidity strength, which allows that it coordinate with water molecules, consequently generating H 3 O + ions in the reaction medium. Even though the catalyst has been water-soluble, it was easily reused removing the extracting phase, and adding a new load of the substrate to the remaining aqueous phase. This way, it was successfully reused without loss activity.

10.21203/rs.3.rs-1104511/v1

Cite

Citations (0)

Sustainable synthesis of acetals from glycerol as potential additives for biofuels under solvent-free conditions

Reaction Chemistry & Engineering (2022)

Gabriel Abranches Dias Castro Ana Luíza Quintão Santos Ángel G. Sathicq Valeria Palermo Gustavo P. Romanelli

Acetals formed from glycerol find applications in several areas, their use as fuel additives being the most promising, since it results in total integration in the biodiesel chain and eliminates one of the obstacles to its production.

Sustainable Production

10.1039/d1re00557j

Cite

Citations (9)

One-pot tandem synthesis of 5-ethoxymethylfurfural as a potential biofuel

Reaction Chemistry & Engineering (2022)

Gabriel Abranches Dias Castro Sérgio Antônio Fernandes

5-Ethoxymethylfurfural (EMF) is a potential biofuel, fuel additive and raw material in the chemical and beverage industry.

Tandem

10.1039/d2re00348a

Cite

Citations (14)

Green Synthesis of 5-Hydroxymethylfurfural in a Biphasic System Assisted by Microwaves

Catalysis Letters (2022)

Gabriel Abranches Dias Castro Sérgio Antônio Fernandes

5-hydroxymethylfurfural

Hydroxymethylfurfural

Sulfonic acid

10.1007/s10562-022-04043-x

Cite

Citations (10)

Conversion of Glucose to 5-Hydroxymethylfurfural Using Consortium Catalyst in a Biphasic System and Mechanistic Insights

SSRN Electronic Journal (2022)

Geraldo Ferreira David Daniela Margarita Echeverri Delgadillo Gabriel Abranches Dias Castro Diana Catalina Cubides-Román Sérgio Antônio Fernandes

We found an effective catalytic consortium capable of convertion glucose to 5-hydroxymethylfurfural (HMF) in high yields (50%). The reaction consist of a consortion of a Lewis acid (NbCl5) and Bronsted acid (p-sulfonic acid cali[4]arene (CX4SO3H) in a microwave-assisted reactor and in a biphasic system. The best result for the conversion of glucose to HMF (yield of 50%) was obtained with CX4SO3H/NbCl5 (5 wt%/ 7.5 wt%), using water/NaCl and MIBK (1:3), at 150 °C, 17.5 min. The consortium catalyst recycling was tested, alowing its reuse for up to 7 times, while maintaining the HMF yield constant. Additionally, is proposed a catalytic cycle by converting glucose to HMF, highlighting two key points: the isomerization of glucose into fructose, in the presence of Lewis acid (NbCl5), and the conversion of fructose into HMF, in the presence of CX4SO3H/NbCl5. A mechanism for the converting glucose to HMF involving was proposed and validated.

5-hydroxymethylfurfural

10.2139/ssrn.4117074

Cite

Citations (0)