A5024006391- Carbon dioxide utilization in catalysis
- Asymmetric Hydrogenation and Catalysis
- Catalysis for Biomass Conversion
- Oxidative Organic Chemistry Reactions
- Catalytic Alkyne Reactions
- Catalytic C–H Functionalization Methods
- Radical Photochemical Reactions
- Advanced Synthetic Organic Chemistry
- Lignin and Wood Chemistry
- Chemical Reactions and Isotopes
- Catalysts for Methane Reforming
- biodegradable polymer synthesis and properties
- Chemical Synthesis and Analysis
University of Antwerp
2019-2024
ZNA Middelheim Hospital
2022
We investigate the scope of organocatalyzed step-growth copolymerization CO2-sourced exovinylene bicyclic carbonates with bio-based diols into polycarbonates. A series regioregular poly(oxo-carbonate)s were prepared from sugar- (1,4-butanediol and isosorbide) or lignin-derived (1,4-benzenedimethanol 1,4-cyclohexanediol) at 25 °C 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as a catalyst, their defect-free structure was confirmed by nuclear magnetic resonance spectroscopy studies. Their...
4-Propylcatechol carbonate is a shelf-stable, renewable C1 reactant. It easily prepared from 4-propylcatechol (derived wood) and dimethyl CO2 ) using reactive distillation system. In this work, the used for two-step synthesis of carbamates under mild reaction conditions. first step, treated with an alcohol at 50-80 °C in presence Lewis acid catalyst, such as Zn(OAc)2 ⋅2 H2 O. With liquid alcohols, no solvent solid alcohols 2-methyltetrahydrofuran solvent. second alkyl 2-hydroxy-propylphenyl...
Acetate serves as a renewable and easily installed leaving group for selective deoxygenation of phenolics (ArOH). Ni-catalyzed hydrodeacetoxylation aryl acetates (Ar-OAc) with HBpin in green carbonate solvent selectively delivers the corresponding deoxygenated arenes (ArH). The method is also applicable to highly challenging guaiacyl syringyl acetates, -OMe groups intact without arene reduction. Renewable 4-propylguaiacol obtained from pine can be transformed significant loss yield versus...
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 4-propylcatechol carbonate as a new shelf-stable and renewable C1 reactant for the synthesis of carbamates. It is easily synthesized from (derived wood) dimethylcarbonate CO2) using reactive distillation system. This research provides means to prepare carbamates in two steps starting cyclic reactant, that is, substitution with an alcohol followed by amine, under mild reaction conditions. order avoids isocyanate intermediates (or their unstable precursors), which are...
Abstract Acetate serves as a renewable and easily installed leaving group for selective deoxygenation of phenolics (ArOH). Ni‐catalyzed hydrodeacetoxylation aryl acetates (Ar−OAc) with HBpin in green carbonate solvent selectively delivers the corresponding deoxygenated arenes (ArH). The method is also applicable to highly challenging guaiacyl syringyl acetates, −OMe groups intact without arene reduction. Renewable 4‐propylguaiacol obtained from pine can be transformed significant loss yield...
The reaction mechanism of quinuclidine mediated C-H oxidation unactivated bonds has been elucidated. In-situ cathodically generated H 2 O was shown to diffuse the anode where it is oxidized and participates in ketonization reaction. Further O, + leads glassy carbon surface degradation. Oxidation be kinetic-diffusion control limited irreversible at 0 1 M 1,1,1,3,3,3-hexafluoroisopropan-2-ol solutions, quasi-reversible 0.1 M. Competing side reactions with hexafluropropanolate hydrogen peroxide...