Jonas Mortier, Christian V. Stevens and Thomas S. A. Heugebaert
{"title":"Electrochemical hydrocarboxylation of styrene with CO2 in continuous flow†","authors":"Jonas Mortier, Christian V. Stevens and Thomas S. A. Heugebaert","doi":"10.1039/D5RE00162E","DOIUrl":"https://doi.org/10.1039/D5RE00162E","url":null,"abstract":"<p >This study demonstrates the advantages of an electrochemical continuous flow cell regarding the β-hydrocarboxylation of styrene. An efficient continuous flow method was developed, obtaining high yields of carboxylic acid with a very low residence time, however still maintaining high selectivity.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1455-1460"},"PeriodicalIF":3.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00162e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Giulia Brufani, Maitê Campos, Chiara Lenzi, Luís Adriano Santos do Nascimento, Emilia Paone, Andrea Piazzi, Rita Mazzoni, Luigi Vaccaro and Francesco Mauriello
{"title":"Selective transfer hydrogenation of furfural under continuous flow conditions promoted by the recoverable homogeneous Shvo's catalyst†","authors":"Giulia Brufani, Maitê Campos, Chiara Lenzi, Luís Adriano Santos do Nascimento, Emilia Paone, Andrea Piazzi, Rita Mazzoni, Luigi Vaccaro and Francesco Mauriello","doi":"10.1039/D5RE00176E","DOIUrl":"https://doi.org/10.1039/D5RE00176E","url":null,"abstract":"<p >The continuous-flow application of the homogeneous Shvo's catalyst for the selective transfer hydrogenation of furfural to furfuryl alcohol, utilizing biobased 2-methyltetrahydrofuran as the reaction medium and 2-propanol as a stoichiometric hydrogen donor is reported for the first time. The homogeneous catalyst demonstrated excellent recyclability, maintaining high performance over at least five consecutive reaction cycles. This process represents an efficient and waste-minimized strategy for the reductive catalytic valorization of biomass-derived furfural under continuous-flow conditions, as validated by a comprehensive green metrics assessment.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1227-1232"},"PeriodicalIF":3.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00176e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tom L. Roberts, Jonathan P. Dolan, Gavin J. Miller, Marcelo A. D. Lima and Sebastian C. Cosgrove
{"title":"A modular, reusable biocatalytic flow system for UDP-GlcNAc production†","authors":"Tom L. Roberts, Jonathan P. Dolan, Gavin J. Miller, Marcelo A. D. Lima and Sebastian C. Cosgrove","doi":"10.1039/D5RE00127G","DOIUrl":"10.1039/D5RE00127G","url":null,"abstract":"<p >We report here the continuous flow synthesis of a high-value sugar nucleotide. Immobilisation of enzymes onto solid carriers permitted transfer of the biocatalysts into packed bed reactors to realise a continuous biocatalytic platform for the synthesis of uridine diphosphate <em>N</em>-acetylglucosamine (UDP-GlcNAc) on 100 mg scale, with capacity for multiple reuses. The modular continuous flow approach described here represents a significant, up to 11-fold, improvement in space time yield (STY) when compared to batch studies, along with preventing product induced enzyme inhibition, reducing the need for an additional enzyme to break down inorganic pyrophosphate (PPi). The modular nature of the system has also allowed tailored conditions to be applied to each enzyme, overcoming issues relating to thermal stability. This development presents a platform approach towards a more efficient, continuous synthesis of important glycan targets including glycoproteins, specific oligosaccharide sequences and glycosylated drug targets.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1221-1226"},"PeriodicalIF":3.4,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12079181/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144092221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photocatalytic evolution of nitrous oxide from nitric monoxide over Pt-loaded titanium dioxide under UV irradiation†","authors":"Ryo Asayama, Masanori Takemoto, Arata Suzuki, Ryuichi Watanabe, Fuminao Kishimoto, Kenta Iyoki, Tatsuya Okubo and Toru Wakihara","doi":"10.1039/D5RE00119F","DOIUrl":"https://doi.org/10.1039/D5RE00119F","url":null,"abstract":"<p >This study presents a photocatalytic evolution of nitrous oxide (N<small><sub>2</sub></small>O) from nitric monoxide (NO), well known as a harmful gas contained in exhaust gas. Pt nanoparticles (NPs) were loaded on titanium dioxide (TiO<small><sub>2</sub></small>) using different methods including impregnation, photo-deposition and chemical reduction methods. Bare TiO<small><sub>2</sub></small> (without metal loading) did not exhibit high N<small><sub>2</sub></small>O evolution under UV irradiation, but all Pt-loaded TiO<small><sub>2</sub></small> photocatalysts did exhibit improved N<small><sub>2</sub></small>O evolution.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1216-1220"},"PeriodicalIF":3.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00119f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sebastián Pinzón-López, Eric T. Sletten, Matthias Kraume, Peter H. Seeberger and José Danglad-Flores
{"title":"Physicochemical aspects of solid phase synthesis using cross-linked polymeric matrices","authors":"Sebastián Pinzón-López, Eric T. Sletten, Matthias Kraume, Peter H. Seeberger and José Danglad-Flores","doi":"10.1039/D5RE00115C","DOIUrl":"https://doi.org/10.1039/D5RE00115C","url":null,"abstract":"<p >Solid phase synthesis (SPS) offers a bottom-up approach for assembling (bio-)oligomers and polymers with precise molecular detail. Although SPS has been applied to various organic compounds, it is expressly convenient for assembling biopolymers. Fundamental studies and optimization efforts have focused solely on organic chemistry aspects, often neglecting physicochemical issues. Here, we summarize the current understanding of the physical phenomena occurring in the gel-like, solvent-swollen polymer beads used commonly as a solid support, aiming to help advance SPS by providing new insights based on physicochemical principles.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1442-1454"},"PeriodicalIF":3.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00115c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amin Yousefvand, Mahdieh Ghobadifard and Sajjad Mohebbi
{"title":"Lead titanate-modified perovskite with silver and cobalt as a superior photocatalyst toward the conversion of methylene blue","authors":"Amin Yousefvand, Mahdieh Ghobadifard and Sajjad Mohebbi","doi":"10.1039/D4RE00546E","DOIUrl":"https://doi.org/10.1039/D4RE00546E","url":null,"abstract":"<p >Lead titanate perovskite (PbTiO<small><sub>3</sub></small>) and Ag–Co co-doped PbTiO<small><sub>3</sub></small> (Ag–Co-PTO) nanoparticles were obtained by a hydrothermal procedure. The prepared samples were characterized by physicochemical techniques, and the phase, morphology, elemental composition, and optical properties were analyzed. To investigate the impact of the as-prepared photocatalyst on dye conversion, several parameters, like pH conditions in the presence of the different amounts of catalyst and oxidant at various temperatures, were optimized. At pH = 5, the Ag–Co-PTO photocatalyst converted 88% of methylene blue (MB) within 40 min under a visible lamp. The superior photo-performance of Ag–Co-PTO is due to the powerful electronic interaction among Ag, Co, and perovskite, which promotes the transfer and separation of charges. Besides, the predicted photocatalytic mechanism of Ag–Co-PTO and its stability tests are considered. Typically, Ag–Co-PTO highlights a promising opportunity for the conversion of pollutants.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1665-1675"},"PeriodicalIF":3.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Valerie Ramaotsoa, Ian Strydom, Jenny-Lee Panayides and Darren Riley
{"title":"Expression of Concern: Immobilized tetrakis(triphenylphosphine)palladium(0) for Suzuki–Miyaura coupling reactions under flow conditions","authors":"G. Valerie Ramaotsoa, Ian Strydom, Jenny-Lee Panayides and Darren Riley","doi":"10.1039/D5RE90015H","DOIUrl":"https://doi.org/10.1039/D5RE90015H","url":null,"abstract":"<p >Expression of Concern for ‘Immobilized tetrakis(triphenylphosphine)palladium(0) for Suzuki–Miyaura coupling reactions under flow conditions’ by G. Valerie Ramaotsoa <em>et al.</em>, <em>React. Chem. Eng.</em>, 2019, <strong>4</strong>, 372–382, https://doi.org/10.1039/C8RE00235E.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1429-1429"},"PeriodicalIF":3.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re90015h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenjia Wang, Owen J. Dziedzic, Claire R. Lesnjak, Zhuoqian Yu, James Miller, Xiaolei Shi, Jarryd R. Featherman, Scott A. Rankin and George W. Huber
{"title":"The kinetics of aqueous lactose hydrolysis with sulfuric acid†","authors":"Wenjia Wang, Owen J. Dziedzic, Claire R. Lesnjak, Zhuoqian Yu, James Miller, Xiaolei Shi, Jarryd R. Featherman, Scott A. Rankin and George W. Huber","doi":"10.1039/D5RE00175G","DOIUrl":"https://doi.org/10.1039/D5RE00175G","url":null,"abstract":"<p >Lactose-rich Greek yogurt acid whey (GAW) is a waste stream in the dairy industry that has caused severe environmental and economic challenges to the U.S. agricultural communities. Lactose is a sugar found in dairy products that has a low sweetness value and is often difficult to digest. Lactose can be hydrolyzed into glucose–galactose syrups (GGS). However, 5-hydroxymethylfurfural (HMF) is formed which must be removed for the GGS to be used as an alternative sustainable sweetener. In this study, we model lactose hydrolysis and include the first detailed kinetic investigation of HMF formation during sulfuric-acid-catalyzed lactose hydrolysis. We systematically examined the effects of temperature, lactose concentration, pH, and reaction time on the hydrolysis process, proposed 57 possible reaction networks, and developed a kinetic model accurately describing lactose hydrolysis and HMF formation, and calculated key kinetic parameters. Our model demonstrated strong alignment with experimental data and allowed us to simulate optimal conditions for maximizing GGS yield over 89% while minimizing HMF formation by 75–80%. This study provides valuable insights for optimizing reactor design and operational strategies, improving the economic viability and sustainability of GAW valorization.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1676-1691"},"PeriodicalIF":3.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kun Li, Baicheng Feng, Meng Guo, Rong Qu and Yan Jin
{"title":"Ag-doped Ni/SiO2 catalysts for the synthesis of aromatic amines from aromatic phenol†","authors":"Kun Li, Baicheng Feng, Meng Guo, Rong Qu and Yan Jin","doi":"10.1039/D5RE00055F","DOIUrl":"https://doi.org/10.1039/D5RE00055F","url":null,"abstract":"<p >Aromatic primary amines are chemical products and raw materials with a wide range of applications. However, synthesis of primary aromatic amines relies heavily on non-renewable petrochemicals as feedstock. We have prepared a catalyst for Ni/SiO<small><sub>2</sub></small> doped Ag, and a process has been instituted to prepare aromatic primary amines, which use renewable resources as raw materials through a fixed bed reactor under ambient pressure conditions. The catalyst and process were validated using phenol synthesis of aniline as a template reaction. The resultant surface phenol conversion is 99% and aniline selectivity is 98.5%, and the by-product of the reaction is water, which is in line with the principles of green chemistry. The broad applicability of the catalysts and synthesis process was further verified by the synthesis of aromatic primary amines using the corresponding aromatic phenols. The catalysts were characterized using TEM, SEM, BET, XPS and XRD techniques to fully analyze their morphology, microstructure and elemental composition. The adsorption model was constructed based on the characterization results, and the density functional theory (DFT) calculations confirmed that after doping Ag, phenol formed shorter chemical bonds at the active site of Ni–Ag bimetal through chemical adsorption, which indicated that it had stronger adsorption energy for phenol, and the amount of electron transfer from the active site of Ni–Ag bimetal to phenol was 2.9 fold higher than that before doping, which significantly promoted the activation of reactants.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1596-1605"},"PeriodicalIF":3.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Feda'a M. Al-Qaisi, Abdussalam K. Qaroush, Ahmad M. Ala'mar, Ala'a F. Eftaiha, Khaleel I. Assaf and Timo Repo
{"title":"Aminopropylimidazole and its zinc complex: CO2 chemistry and catalytic synthesis of cyclic carbonates†","authors":"Feda'a M. Al-Qaisi, Abdussalam K. Qaroush, Ahmad M. Ala'mar, Ala'a F. Eftaiha, Khaleel I. Assaf and Timo Repo","doi":"10.1039/D5RE00073D","DOIUrl":"https://doi.org/10.1039/D5RE00073D","url":null,"abstract":"<p >The biomimicry of carbonic anhydrase as the interaction between zinc and imidazole serves as an inspiration to engineer synthetic systems for CO<small><sub>2</sub></small> capture and utilization. In this research, we developed a zinc–aminopropylimidazole (Zn–api) complex to achieve CO<small><sub>2</sub></small> insertion and subsequently catalyze its cycloaddition reaction with a variety of epoxides. We investigated the complexation and carbamation reactions of both the unbound ligand and its zinc complex in aqueous and DMSO solutions. In D<small><sub>2</sub></small>O, unbound api reacts with CO<small><sub>2</sub></small> through a 1 : 2 mechanism, forming ammonium carbamate. However, in DMSO-<em>d</em><small><sub>6</sub></small>, the reaction follows a 1 : 1 pathway and leads to carbamic acid. Interestingly, the Zn–api complex captures CO<small><sub>2</sub></small> differently depending on the solvent, forming an uncharged species (–NHCO<small><sub>2</sub></small>–Zn) in water and a zwitterionic carbamate (–NH<small><sub>2</sub></small><small><sup>+</sup></small>Br<small><sup>−</sup></small>–CO<small><sub>2</sub></small>–Zn–Im) in DMSO. To our knowledge, a first time zwitterionic carbamate coordination mode <em>via</em> CO<small><sub>2</sub></small> insertion is verified by <em>in situ</em> ATR-FTIR with a peak centered at 1704 cm<small><sup>−1</sup></small> and further supported by quantum chemical calculations. The latter complex exhibits excellent catalytic performance for cyclic carbonates synthesis, achieving 94% and 96% conversion for epichlorohydrin carbonate and glycidol carbonate, respectively, under ambient reaction conditions using a CO<small><sub>2</sub></small> balloon. Notably, it demonstrates remarkable stability over five consecutive catalytic cycles for the coupling of epichlorohydrin and CO<small><sub>2</sub></small> without a discernible decrease in activity.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 7","pages":" 1461-1472"},"PeriodicalIF":3.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}