Calix[n]arenes in Action: Recent Applications in Organocatalysis DOI
Juliana Baptista Simões, Daniel Leite da Silva, Sérgio Antônio Fernandes

et al.

European Journal of Organic Chemistry, Journal Year: 2022, Volume and Issue: 2022(38)

Published: July 26, 2022

Abstract The use of calix[ n ]arenes as organocatalysts has increasingly been considered a prime focus due to their adjustable three‐dimensional molecular structure, easy synthesis, and versatile structural modification at the upper lower edges. For instance, these macromolecules have described efficient catalysts for asymmetric aldol reactions, Michael addition, esterification transesterification, dehydration, nucleophilic aromatic substitution, multicomponent reactions. Furthermore, also tolerate aqueous or solvent‐free reaction systems can be supported on solid and/or magnetic particles, showing cost, time energy savings, easier experimental procedures, chemical waste reduction.

Language: Английский

Advances in selective conversion of carbohydrates into 5-hydroxymethylfurfural DOI Creative Commons
Jie Liang, Jianchun Jiang, Tingting Cai

et al.

Green Energy & Environment, Journal Year: 2023, Volume and Issue: 9(9), P. 1384 - 1406

Published: Nov. 22, 2023

Converting carbohydrates into 5-hydroxymethylfurfural (5-HMF) is an attractive and promising route for value-added utilization of agricultural forestry biomass resource. As important platform compound, 5-HMF possesses high active furan structure with hydroxymethyl aldehyde group production various bio-chemicals materials, meanwhile, which suffer from low stability poor yield during the industrial biorefinery process. Hence, selective high-yield low-cost has attracted extensive attention scientific researchers. This review sorted described latest advanced research on solvent catalyst system, as well energy field effect different feedstock in detail, emphatically discussing its synergistic other aspects. Besides, future prospects challenges were also presented, provide a profound insight process economic environmental feature.

Language: Английский

Citations

22

Phosphotungstic acid immobilized over SnO2 mesoporous material as a heterogeneous catalyst for fructose to 5-hydroxymethylfurfural conversion DOI
Dulu Brahma, Riu Riu Wary,

Jugal Bori

et al.

Biomass and Bioenergy, Journal Year: 2023, Volume and Issue: 173, P. 106777 - 106777

Published: April 11, 2023

Language: Английский

Citations

13

Green synthesis of furfural from xylose and corn cob biomass DOI
Gabriel Abranches Dias Castro,

Rodrigo Candido Batista,

Rita de Cássia Superbi de Sousa

et al.

Reaction Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 8(8), P. 1969 - 1980

Published: Jan. 1, 2023

Furfural is a versatile, high-value-added platform molecule that can be produced from five carbon atom (C5) carbohydrates present in lignocellulosic biomass.

Language: Английский

Citations

12

Furans derived from lignocellulosic biomass as renewable substrates in multicomponent reactions DOI
Gabriel Abranches Dias Castro, Sérgio Antônio Fernandes

Sustainable Chemistry and Pharmacy, Journal Year: 2025, Volume and Issue: 44, P. 101948 - 101948

Published: Feb. 11, 2025

Language: Английский

Citations

0

One-pot tandem synthesis of 5-ethoxymethylfurfural as a potential biofuel DOI
Gabriel Abranches Dias Castro, Sérgio Antônio Fernandes

Reaction Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 8(1), P. 220 - 228

Published: Oct. 11, 2022

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

Language: Английский

Citations

14

Green synthesis of 5-hydroxymethylfurfural and 5-acetoxymethylfurfural using a deep eutectic solvent in a biphasic system assisted by microwaves DOI
Gabriel Abranches Dias Castro, Sérgio Antônio Fernandes, Rita de Cássia Superbi de Sousa

et al.

Reaction Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 8(6), P. 1324 - 1333

Published: Jan. 1, 2023

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

Language: Английский

Citations

7

Synthesis of furfural from xylose using a choline chloride-based deep eutectic solvent and mechanistic insights DOI

Daniela Margarita Echeverri Delgadillo,

Gabriel Abranches Dias Castro, Sérgio Antônio Fernandes

et al.

Reaction Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 9(6), P. 1560 - 1568

Published: Jan. 1, 2024

Choline chloride-based deep eutectic solvents can be used in the green synthesis of furfural, a platform molecule derived from biomass.

Language: Английский

Citations

2

Multicomponent double Povarov reaction for julolidine: Synthesis and mechanistic insights DOI
Sandra Milena Bonilla Castañeda, Walysson Ferreira de Paiva, Gabriel Abranches Dias Castro

et al.

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 568, P. 114487 - 114487

Published: Aug. 29, 2024

Language: Английский

Citations

1

Conversion of Glucose to 5-Hydroxymethylfurfural Using Consortium Catalyst in a Biphasic System and Mechanistic Insights DOI Open Access
Geraldo Ferreira David,

Daniela Margarita Echeverri Delgadillo,

Gabriel Abranches Dias Castro

et al.

Catalysts, Journal Year: 2023, Volume and Issue: 13(3), P. 574 - 574

Published: March 12, 2023

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

Language: Английский

Citations

3

Calix[n]arenes in Action: Recent Applications in Organocatalysis DOI
Juliana Baptista Simões, Daniel Leite da Silva, Sérgio Antônio Fernandes

et al.

European Journal of Organic Chemistry, Journal Year: 2022, Volume and Issue: 2022(38)

Published: July 26, 2022

Abstract The use of calix[ n ]arenes as organocatalysts has increasingly been considered a prime focus due to their adjustable three‐dimensional molecular structure, easy synthesis, and versatile structural modification at the upper lower edges. For instance, these macromolecules have described efficient catalysts for asymmetric aldol reactions, Michael addition, esterification transesterification, dehydration, nucleophilic aromatic substitution, multicomponent reactions. Furthermore, also tolerate aqueous or solvent‐free reaction systems can be supported on solid and/or magnetic particles, showing cost, time energy savings, easier experimental procedures, chemical waste reduction.

Language: Английский

Citations

4