A5002299826- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- Biochemical and biochemical processes
- Synthesis of β-Lactam Compounds
- Catalysis and Hydrodesulfurization Studies
- Synthesis and Catalytic Reactions
- Carbohydrate Chemistry and Synthesis
- Advanced Synthetic Organic Chemistry
- Oxidative Organic Chemistry Reactions
- Microbial Metabolism and Applications
- Zeolite Catalysis and Synthesis
- Asymmetric Synthesis and Catalysis
- Asymmetric Hydrogenation and Catalysis
- Enzyme-mediated dye degradation
- Chemical Synthesis and Analysis
- Synthesis and Biological Activity
- Microbial Metabolic Engineering and Bioproduction
University of Antwerp
2019-2025
Laboratoire de Synthèse Organique
2024
Ghent University Hospital
2016
Ghent University
2016
Bioscience Research
2016
A new approach to synthesize valuable 3,4-dialkoxyanilines and alkyl propionates from lignin-derived 4-propylguaiacol -catechol with overall isolated yields up 65% has been described. The strategy is based on the introduction of nitrogen via a Beckmann rearrangement. Amino therefore coincides C-defunctionalization reaction; replacement propyl chain by an amino group obtained. process only requires cheap bulk chemicals as reagents/reactants does not involve column chromatography purify...
A method for the cleavage of aryl alkyl ethers is presented, involving hot pressurized water and catalytic mineral acid. The protocol applicable on a variety (biorenewable) substrates, not requiring mass-intensive work-up.
Abstract A catalytic route is developed to synthesize bio‐renewable catechol from softwood‐derived lignin‐first monomers. This process concept consists of two steps: 1) O ‐demethylation 4‐ n ‐propylguaiacol (4‐PG) over acidic beta zeolites in hot pressurized liquid water delivering ‐propylcatechol (4‐PC); 2) gas‐phase C ‐dealkylation 4‐PC providing and propylene ZSM‐5 the presence water. With large pore sized beta‐19 zeolite as catalyst, formed with more than 93 % selectivity at nearly full...
An efficient conversion of biorenewable ferulic acid into bio-catechol has been developed. The transformation comprises two consecutive defunctionalizations the substrate, that is, C-O (demethylation) and C-C (de-2-carboxyvinylation) bond cleavage, occurring in one step. process only requires heating with HCl (or H2 SO4 ) as catalyst pressurized hot water (250 °C, 50 bar N2 ). versatility is shown on a variety other (biorenewable) substrates yielding up to 84 % di- (catechol, resorcinol,...
Abstract An efficient conversion of biorenewable ferulic acid into bio‐catechol has been developed. The transformation comprises two consecutive defunctionalizations the substrate, that is, C−O (demethylation) and C−C (de‐2‐carboxyvinylation) bond cleavage, occurring in one step. process only requires heating with HCl (or H 2 SO 4 ) as catalyst pressurized hot water (250 °C, 50 bar N ). versatility is shown on a variety other (biorenewable) substrates yielding up to 84 % di‐ (catechol,...
4-(Cyanomethyl)azetidin-2-ones were efficiently prepared from 1,2:5,6-di-<italic>O</italic>-isopropylidene-<sc>d</sc>-mannitol, followed by a nitrilase-catalyzed hydrolysis to 4-carboxymethyl β-lactams without affecting the sensitive four-membered ring system.
New lignocellulose biorefinery technologies that enable the conversion of lignin into platform chemicals are essential to reduce our future dependence on fossil resources. In this study, we investigate Brønsted acid-catalyzed O-demethylation guaiacol in hot-pressurized water (HPW) as a model reaction for transforming lignin-derived phenolic substrates featuring ortho methoxy groups. We compare effects mineral acid (HCl) and microporous solid (H-BEA zeolite) elucidate hydrolysis mechanism...
4-Propylcatechol carbonate is a shelf-stable renewable C1 transfer reactant that easily accessible via transesterification of dimethyl with 4-propylcatechol employing reactive distillation. can be obtained from 4-propylguaiacol and CO2. Both are industrially produced on the multiton scale. The former currently only petrochemically but expected to become available large scale future refinery wood, based reductive catalytic fractionation. A one-pot, two-step scalable synthesis amides involving...
The Cover Feature shows that two types of zeolites (BEA* and MFI) were used as catalysts (saws) to respectively break the C−O C−C bonds lignin-first monomers obtained from soft wood. developed catalytic strategy provides a new approach produce catechol renewable feedstocks. More information can be found in Research Article by X. Wu et al.
Mineralsäuren in heißem Wasser unter Druck können aromatische Bioraffinerieprodukte desalkylieren, wie B. U. W. Maes et al. ihrer Zuschrift auf S. 3087 schildern. Ferulinsäure aus Reiskleie, ein Abfallprodukt der Agrarindustrie, kann Biocatechol überführt werden. Petrochemisches Catechol findet Anwendung bei Produktion von Agrochemikalien, Pharmazeutika, Geschmacksstoffen, Duftstoffen und Polymeren ist somit großer Bedeutung für die moderne Gesellschaft. Cover: Joris Snaet.