Article
Biochemistry & Molecular Biology
Cuong Viet Bui, Thomas Rosenau, Hubert Hettegger
Summary: Polyanionic cellulose carbamates were synthesized through homogeneous aminolysis of cellulose carbonate half-esters in an ionic liquid/DMF medium. The reactivity of different chloroformates towards cellulose and the suitability of the respective carbonate half-esters in the aminolysis process were comprehensively studied. Furthermore, solubility problems with certain amines were overcome by using a binary solvent system, enabling rapid and efficient homogeneous aminolysis.
Article
Chemistry, Multidisciplinary
Changhyeon Seo, Seong Eon Kim, Hyunjin Kim, Hye-Young Jang
Summary: In this study, dual-functional Cu(triNHC) catalysts were used for the efficient coupling of CO2 with alcohols and amines, resulting in the formation of various carbonates and carbamates. The dual function of Cu(triNHC) plays a critical role in the reaction.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Physical
Filip Vranjesevic, Maria Kolympadi Markovic, Dario Matulja, Gabriela Ambrozic, Jose Angel Sordo, Sylvain Laclef, Valerije Vrcek, Dean Markovic
Summary: This article summarizes the research progress on the synthesis of organic carbonates and carbamates, focusing on catalytic conversion reactions using carbon dioxide as a reagent. Both metal-catalyzed and organocatalyzed methods are discussed, along with the mechanisms and key intermediates of the carbonate and carbamate forming reactions.
Review
Materials Science, Paper & Wood
Qianqian Wang, Rui Zhou, Simeng Liu, Sivasamy Sethupathy, Jun Liu, Jianzhong Sun, Lihua Zou, Qianqian Zhu
Summary: Templated synthesis and assembly of nanostructured materials with tailored properties have attracted significant attention. In this review, the dual roles of cellulose nanomaterials (CNMs) as templates for synthesis and assembly are extensively explored. Various nanostructures developed with CNMs, including aerogels, microspheres, nanotubes, nanorods, mesoporous structures, anisotropic, and biomimetic structures, offer versatile applications. The critical challenges and prospects for using sustainable CNMs in templated synthesis and assembly are also highlighted.
Review
Chemistry, Inorganic & Nuclear
Katsuhiko Takeuchi, Kazuhiro Matsumoto, Norihisa Fukaya, Kohtaro Osakada, Kazuhiko Sato, Jun-Chul Choi
Summary: The utilization of carbon dioxide in chemical materials has gained attention for its potential contribution to the reduction of CO2 emissions and mitigating climate change. A practical and environmentally friendly method for the synthesis of various organic carbamates from CO2, including industrially important diisocyanate precursors, using alkoxysilanes is proposed.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Titu Mondal, Jhumur Seth, Somnath Sarkar, Sk Manirul Islam
Summary: Recently, the conversion of carbon dioxide into important fine chemicals has gained attention due to its abundance as a C1 source. A single-step synthesis of a SO3H-anchored covalent organic framework (COF) has been introduced in this study. The COF showed a large surface area and acted as a catalyst for the carbamate synthesis reaction from epoxides and amines in the presence of CO2. It exhibited excellent catalytic activity with high yield and could be easily separated and reused.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Physical
Yong You, Qun Li, Yan-Ping Zhang, Jian-Qiang Zhao, Zhen-Hua Wang, Wei-Cheng Yuan
Summary: Palladium-catalyzed decarboxylative cycloadditions have emerged as highly efficient methods for constructing structurally diverse carbo- and heterocycles due to their ability to form multiple carbon-carbon or carbon-heteroatom bonds in a single step. This review discusses the achievements and synthetic applications of these reactions involving cyclic carbonates, carbamates, and lactones for accessing oxacyclo-, azacyclo-, and carbocyclic compounds. Mechanistic insights and the challenges and opportunities in this field are also addressed.
Article
Chemistry, Organic
Svetlana O. Kasatkina, Kirill K. Geyl, Sergey V. Baykov, Irina A. Boyarskaya, Vadim P. Boyarskiy
Summary: A novel catalyst-free synthesis method has been developed for the production of N-pyridin-2-yl, N-quinolin-2-yl, and N-isoquinolin-1-yl carbamates using easily accessible N-hetaryl ureas and alcohols. The reaction yields a wide range of products with good-to-high efficiency, with successful synthesis of ethyl benzo[h]quinolin-2-yl carbamate at a yield of 68%.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Polymer Science
Korbinian Sommer, Daniel Van Opdenbosch, Cordt Zollfrank
Summary: The use of biodegradable materials can be extended by combining and modifying biopolymers such as cellulose and polyesters. By controlling the molecular structure and composition of copolymers, their material properties can be tailored. This article reports on the synthesis and characterization of cellulose-based graft copolymers with precise molecular composition and copolymer architecture.
Review
Chemistry, Multidisciplinary
Meghan E. Lamm, Kai Li, Ji Qian, Lu Wang, Nathalie Lavoine, Reagan Newman, Douglas J. Gardner, Teng Li, Liangbing Hu, Arthur J. Ragauskas, Halil Tekinalp, Vlastimil Kunc, Soydan Ozcan
Summary: The use of cellulose nanofibers in templating shows great promise in controlling the final properties of advanced functional materials, including mechanical strength, porosity, and others.
ADVANCED MATERIALS
(2021)
Article
Engineering, Chemical
Christian Bethke, Simon T. Kaysser, Du Ngoc Uy Lan, Sebastian M. Goller, Kasper P. van Der Zwan, Juergen Senker, Holger Ruckdaeschel, Volker Altstaedt
Summary: Carbamates are suitable alternatives for common chemical blowing agents in epoxy foams, releasing CO2 and curing epoxy resins with no undesired byproducts. Analysis of their chemical structures, decomposition, and curing behavior shows that all carbamates perform well in foaming experiments at specifically adapted temperatures.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Lu Wang, Fuxing Shi, Chaorong Qi, Wenjie Xu, Wenfang Xiong, Bangxiong Kang, Huanfeng Jiang
Summary: The study presents a stereodivergent synthesis of beta-iodoenol carbamates through a photocatalytic three-component coupling, demonstrating the potential synthetic utility and practicality of the method. Additionally, this strategy could provide a general method for stereodivergent construction of trisubstituted alkenes, representing a fascinating challenge in the field of organic chemistry research.
Article
Chemistry, Organic
Guoliang Zhang, David Favela, Winston L. Chow, Rishab N. Iyer, Alexander J. Pell, David E. Olson
Summary: Basic amines are crucial components of biologically active natural products and drugs. Protecting basic amines is necessary during synthesis, but often leads to wasteful processes. This study presents a step-economical method to protect secondary amines by releasing CO2, allowing their conversion into tertiary amines.
Review
Environmental Sciences
Tao Fu, Linna Du, Suqing Wu, Min Zhao, Xiangyong Zheng, Zhiquan Wang, Yejian Zhang, Chunzhen Fan, Wen Wang, Fuyuan Ran, Ping Lin, Chunjie Zhong
Summary: Wetland plant-based functional materials (WPBFMs) have emerged as a promising method for treating and recycling wetland plant residues. These functional materials have been proven to effectively remove aqueous pollutants, such as antibiotics. This article provides a comprehensive review on the synthesis and application of WPBFMs and gives guidance for future research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Immunology
Anthony S. Bonavia, Abigail Samuelsen, Zissis C. Chroneos, Eric Scott Halstead
Summary: We describe a rapid and precise assay for functional interrogation of the innate and adaptive immune system in healthy volunteers. The advantages of the ELLA microfluidic platform may represent a step forward in generating a point-of-care test with clinical utility for identifying deranged immune phenotypes in septic patients.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Tamilselvan Mohan, Raffael Rathner, David Reishofer, Martin Koller, Thomas Elschner, Stefan Spirk, Thomas Heinze, Karin Stana-Kleinschek, Rupert Kargl
Article
Chemistry, Applied
Thomas Elschner, Ales Doliska, Matej Bracic, Karin Stana-Kleinschek, Thomas Heinze
CARBOHYDRATE POLYMERS
(2015)
Article
Biochemistry & Molecular Biology
Thomas Elschner, Claudia Luedecke, Diana Kalden, Martin Roth, Bettina Loeffler, Klaus D. Jandt, Thomas Heinze
MACROMOLECULAR BIOSCIENCE
(2016)
Article
Chemistry, Multidisciplinary
Thomas Elschner, David Reishofer, Rupert Kargl, Thomas Griesser, Thomas Heinze, Karin Stana Kleinschek
Article
Polymer Science
Thomas Elschner, Franziska Obst, Thomas Heinze, Rupert Kargl, Karin Stana Kleinschek
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
Kerstin Jedvert, Thomas Elschner, Thomas Heinze
MACROMOLECULAR MATERIALS AND ENGINEERING
(2017)
Article
Materials Science, Paper & Wood
Mojca Bozic, Thomas Elschner, Doris Tkaucic, Matej Bracic, Silvo Hribernik, Karin Stana Kleinschek, Rupert Kargl
Review
Biochemistry & Molecular Biology
Thomas Elschner, Franziska Obst, Thomas Heinze
MACROMOLECULAR BIOSCIENCE
(2018)
Article
Biophysics
Ana Bratusa, Thomas Elschner, Thomas Heinze, Eleonore Frohlich, Silvo Hribernik, Mojca Bozic, Ema Zagar, Karin Stana Kleinschek, Martin Thonhofer, Rupert Kargl
COLLOIDS AND SURFACES B-BIOINTERFACES
(2019)
Article
Polymer Science
Tanja Pivec, Rupert Kargl, Uros Maver, Matej Bracic, Thomas Elschner, Ema Zagar, Lidija Gradisnik, Karin Stana Kleinschek
Article
Polymer Science
Thomas Elschner, Erica Brendler, Steffen Fischer
Summary: Cellulose esters of hydroxycinnamic acids, specifically ferulic-, p-coumaric-, and caffeic acid, were successfully synthesized via Mitsunobu esterification with high selectivity and without unwanted conversion. Molecular structure characterization was performed using FTIR- and NMR spectroscopy, with DS values determined through two independent methods. The synthesis of cellulose hydroxycinnamates is important for designing lignocellulosic model systems and antioxidative bioinspired materials.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Thomas Elschner, Joerg Adam, Hans Lesny, Yvonne Joseph, Steffen Fischer
Summary: Thin films of cellulose ferulate were synthesized to investigate the formation of dehydrogenation polymers (DHPs) on anchor groups of the surface. The results showed that the amount of DHP formed on the surface was independent of the base layer thickness.
Article
Materials Science, Paper & Wood
Thomas Elschner, Matej Bracic, Tamilselvan Mohan, Rupert Kargl, Karin Stana Kleinschek
Article
Chemistry, Applied
Thomas Elschner, Franziska Obst, Karin Stana-Kleinschek, Rupert Kargl, Thomas Heinze
CARBOHYDRATE POLYMERS
(2017)
Article
Chemistry, Inorganic & Nuclear
Andreas Taubert, Christian Balischewski, Doreen Hentrich, Thomas Elschner, Sascha Eidner, Christina Guenter, Karsten Behrens, Thomas Heinze
