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Page 1
Selective Nickel-Catalyzed Hydrodeacetoxylation of Aryl Acetates.
De Smet G, Bai X, Mensch C, Sergeyev S, Evano G, Maes BUW. De Smet G, et al. Angew Chem Int Ed Engl. 2022 Sep 19;61(38):e202201751. doi: 10.1002/anie.202201751. Epub 2022 Apr 25. Angew Chem Int Ed Engl. 2022. PMID: 35373882
The method is also applicable to highly challenging guaiacyl and syringyl acetates, leaving -OMe groups intact without arene reduction. Renewable 4-propylguaiacol obtained from pine can also be transformed without significant loss in yield versus oil derived feedsto …
The method is also applicable to highly challenging guaiacyl and syringyl acetates, leaving -OMe groups intact without arene reduction. Rene …
A direct liquid sampling interface for photoelectron photoion coincidence spectroscopy.
Wu X, Pan Z, Steglich M, Ascher P, Bodi A, Bjelić S, Hemberger P. Wu X, et al. Rev Sci Instrum. 2023 Mar 1;94(3):034103. doi: 10.1063/5.0136665. Rev Sci Instrum. 2023. PMID: 37012765
Time-of-flight mass spectra and photoion mass-selected threshold photoelectron spectra (ms-TPES) were recorded for an ethanolic solution of 4-propylguaiacol, vanillin, and 4-hydroxybenzaldehyde (1 g/l of each). The ground state ms-TPES band of vanillin reproduces th …
Time-of-flight mass spectra and photoion mass-selected threshold photoelectron spectra (ms-TPES) were recorded for an ethanolic solution of …
Characterization of alkylguaiacol-degrading cytochromes P450 for the biocatalytic valorization of lignin.
Fetherolf MM, Levy-Booth DJ, Navas LE, Liu J, Grigg JC, Wilson A, Katahira R, Beckham GT, Mohn WW, Eltis LD. Fetherolf MM, et al. Proc Natl Acad Sci U S A. 2020 Oct 13;117(41):25771-25778. doi: 10.1073/pnas.1916349117. Epub 2020 Sep 28. Proc Natl Acad Sci U S A. 2020. PMID: 32989155 Free PMC article.
Bacterial strains Rhodococcus rhodochrous EP4 and Rhodococcus jostii RHA1 both utilized alkylguaiacols as sole growth substrates. Transcriptomics of EP4 grown on 4-propylguaiacol (4PG) revealed the up-regulation of agcA, encoding a CYP255A1 family P450, and the aph …
Bacterial strains Rhodococcus rhodochrous EP4 and Rhodococcus jostii RHA1 both utilized alkylguaiacols as sole growth substrates. Transcript …
Bifunctional Molybdenum Polyoxometalates for the Combined Hydrodeoxygenation and Alkylation of Lignin-Derived Model Phenolics.
Anderson E, Crisci A, Murugappan K, Román-Leshkov Y. Anderson E, et al. ChemSusChem. 2017 May 22;10(10):2226-2234. doi: 10.1002/cssc.201700297. Epub 2017 Apr 28. ChemSusChem. 2017. PMID: 28371565
Here, bifunctional molybdenum-based polyoxometalates supported on titania (POM/TiO(2) ) are shown to promote tandem hydrodeoxygenation (HDO) and alkylation reactions, converting lignin-derived oxygenated aromatics into alkylated benzenes and alkylated phenols in high yields. In p …
Here, bifunctional molybdenum-based polyoxometalates supported on titania (POM/TiO(2) ) are shown to promote tandem hydrodeoxygenation (HDO) …
From Tree to Tape: Direct Synthesis of Pressure Sensitive Adhesives from Depolymerized Raw Lignocellulosic Biomass.
Wang S, Shuai L, Saha B, Vlachos DG, Epps TH 3rd. Wang S, et al. ACS Cent Sci. 2018 Jun 27;4(6):701-708. doi: 10.1021/acscentsci.8b00140. Epub 2018 May 15. ACS Cent Sci. 2018. PMID: 29974065 Free PMC article.
Herein, poplar wood depolymerization followed by minimal purification steps (filtration and extraction) produced two aromatic compounds, 4-propylsyringol and 4-propylguaiacol, with high purity and yield. Efficient functionalization of those aromatic compounds with e …
Herein, poplar wood depolymerization followed by minimal purification steps (filtration and extraction) produced two aromatic compounds, 4-p …
Catalytic depolymerization of Kraft lignin to high yield alkylated-phenols over CoMo/SBA-15 catalyst in supercritical ethanol.
Rana M, Ghosh S, Nshizirungu T, Park JH. Rana M, et al. RSC Adv. 2023 Oct 13;13(43):30022-30039. doi: 10.1039/d3ra05018a. eCollection 2023 Oct 11. RSC Adv. 2023. PMID: 37842670 Free PMC article.
The major phenolic monomers identified in the catalytic bio-oil were 4-ethylguaiacol (9.15 wt%), 4-methylguaiacol (6.80 wt%), and 4-propylguaiacol (2.85 wt%). These findings suggest that the metal sites and abundant acid active sites of CoMo/SBA-15 had a synergistic …
The major phenolic monomers identified in the catalytic bio-oil were 4-ethylguaiacol (9.15 wt%), 4-methylguaiacol (6.80 wt%), and 4- …
Bifunctional Janus Silica Spheres for Pickering Interfacial Tandem Catalysis.
Chang F, Vis CM, Bergmeijer M, Howes SC, Bruijnincx PCA. Chang F, et al. ChemSusChem. 2021 Dec 6;14(23):5328-5335. doi: 10.1002/cssc.202101238. Epub 2021 Oct 28. ChemSusChem. 2021. PMID: 34668343 Free PMC article.
These materials were successfully applied in biphasic Pickering interfacial catalysis for the tandem dehydration-Knoevenagel condensation of fructose to 5-(hydroxymethyl)furfural-2-diethylmalonate (5-HMF-DEM) in a water/4-propylguaiacol PE. The results demonstrate t …
These materials were successfully applied in biphasic Pickering interfacial catalysis for the tandem dehydration-Knoevenagel condensation of …
Formation pathway of disinfection by-products of lignin monomers in raw water during disinfection.
Xu X, Kang J, Shen J, Zhao S, Wang B, Yan P, Fu Q, Chen Z. Xu X, et al. Sci Total Environ. 2022 Jun 15;825:153706. doi: 10.1016/j.scitotenv.2022.153706. Epub 2022 Feb 7. Sci Total Environ. 2022. PMID: 35143787
During disinfection, macromolecular DOM was transformed into small molecules, and lignin substances have the most obvious and complex changes in reaction. Two lignin monomers 4-propylphenol (4PP) and 4-propylguaiacol (4PG) were used as model compounds to study their …
During disinfection, macromolecular DOM was transformed into small molecules, and lignin substances have the most obvious and complex change …
Hydrolysis-dominated catalytic system: Hydrogen-free hydrogenolysis of lignin from Pd-MoOx/TiO2.
Tang D, Lin X, Zhang Q, Wang Z, Liu Y, Jin Y, Wu X, Hu C, Yuan P. Tang D, et al. Int J Biol Macromol. 2024 Apr 15;267(Pt 2):131538. doi: 10.1016/j.ijbiomac.2024.131538. Online ahead of print. Int J Biol Macromol. 2024. PMID: 38621572
After subjecting the reaction to 240 C for 30 h, a yield of 48.22 wt% of total phenolic monomers, with 5.90 wt% consisting of diphenols, was achieved. Investigation into the conversion of 4-propylguaiacol (4-PG), a major depolymerized monomer of corncob lignin, reve …
After subjecting the reaction to 240 C for 30 h, a yield of 48.22 wt% of total phenolic monomers, with 5.90 wt% consisting of diphenols, was …
21 results