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Heterogeneous catalysts for the cyclization of dicarboxylic acids to cyclic anhydrides as monomers for bioplastic production

Wed, 07/26/2017 - 13:55

Green Chem., 2017, 19,3238-3242
DOI: 10.1039/C7GC00538E, PaperMd. N. Rashed, S. M. A. H. Siddiki, Md. A. Ali, Sondomoyee K. Moromi, Abeda S. Touchy, Kenichi Kon, Takashi Toyao, Ken-ichi Shimizu
Niobic acid catalyzes the condensation of biomass-derived dicarboxylic acids into cyclic anhydrides, key intermediates of carbon-neutral and biodegradable polyesters.
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Categories: Green Technology News

Sustainable functionalization of cellulose and starch with diallyl carbonate in ionic liquids

Wed, 07/26/2017 - 06:52
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01978E, Paperzafer soyler, Michael A. R. Meier
A functional and environmentally benign alkoxycarbonylation reagent, diallyl carbonate (DAC), was employed for the sustainable and catalyst-free allyloxycarbonylation of cellulose under homogenous conditions using 1-butyl-3-methylimidazolium chloride (BMIMCI) as a solvent....
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Highly porous graphitic biomass carbon as advanced electrode materials for supercapacitors

Tue, 07/25/2017 - 08:27
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01681F, PaperYouning Gong, Delong Li, Chengzhi Luo, Qiang Fu, Chunxu Pan
In this work, we established a one-step strategy to synthesize three-dimensional porous graphitic biomass carbon (PGBC) from bamboo char (BC), and studied its electrochemical performace as electrode materials for supercapacitors....
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Selective reductive amination of aldehydes from nitro compounds catalyzed by molybdenum sulfide clusters

Tue, 07/25/2017 - 06:24
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01603D, CommunicationElena Pedrajas, Ivan Sorribes, Kathrin Junge, Matthias Beller, Rosa Llusar
Secondary amines are selectively obtained from low value starting materials using hydrogen and a non-noble metal based catalyst. Reductive amination of aldehydes from nitroarenes or nitroalkanes is efficiently catalyzed by...
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Tandem deprotection/coupling for peptide synthesis in water at room temperature

Mon, 07/24/2017 - 10:12
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01575E, CommunicationMargery Cortes-Clerget, Jean-Yves Berthon, Isabelle Krolikewicz-Renimel, Laurent Chaisemartin, Bruce Howard Lipshutz
A tandem deprotection/coupling sequence is reported for solution-phase peptide synthesis in water under micellar catalysis conditions using the designer surfactant TPGS-750-M. Cbz deprotection followed by peptide coupling in the presence...
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Phase-out-compliant fluorosurfactants: unique methimazolium derivatives including room temperature ionic liquids

Mon, 07/24/2017 - 09:11

Green Chem., 2017, 19,3225-3237
DOI: 10.1039/C7GC00571G, PaperM. Hummel, M. Markiewicz, S. Stolte, M. Noisternig, D. E. Braun, T. Gelbrich, U. J. Griesser, G. Partl, B. Naier, K. Wurst, B. Kruger, H. Kopacka, G. Laus, H. Huppertz, H. Schottenberger
Fluoroalkylations of the medicinal drug 1-methyl-3H-imidazole-2-thione provide high yields of superior surfactants with reduced toxicity.
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Activation of (Salen)CoI Complex by Phosphorane for Carbon Dioxide Transformation at Ambient Temperature and Pressure

Mon, 07/24/2017 - 08:11
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01458A, PaperFeng Zhou, Shi-Liang Xie, Xiao-Tong Gao, Rong Zhang, Cui-Hong Wang, Guang-Qiang Yin, Jian Zhou
We report the activation of (salen)CoI complex 3g by a phosphorane to form a bifunctional catalyst for the reaction of carbon dioxide with terminal epoxides or aziridines at ambient temperature...
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A Versatile CO-assisted Direct Reductive Amination of 5-Hydroxymethylfurfural Catalyzed by Supported Gold

Fri, 07/21/2017 - 10:34
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01579H, PaperMing-Ming Zhu, Lei Tao, Qi Zhang, Jing Dong, Yong-Mei Liu, Heyong He, Yong Cao
Reductive amination (RA) constitutes an attractive and practical strategy for discovering protocols capable of converting biomass into valuable N-containing compounds. Described herein is a versatile and sustainable RA of 5-hydroxymethyl-furfural...
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ON THE STRUCTURE OF SOFTWOOD KRAFT LIGNIN

Thu, 07/20/2017 - 11:16
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01812F, PaperClaudia Crestini, Heiko Lange, Marco Sette, D. S. Argyropoulos
Two constitutional structural schemes are proposed attempting to unify and rationalize a series of focused NMR and chromatographic determinations aimed at providing an integrated picture for the structure of softwood...
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Lignin Transformations for High Value Applications: Towards Targeted Modifications Using Green Chemistry

Thu, 07/20/2017 - 08:11
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01479A, Critical ReviewSebastien Gillet, Mario Aguedo, Laurene Petitjean, Ana Rita C. Morais, Andre M da Costa Lopes, Rafal Marcin Lukasik, Paul Anastas
Lignin represents a considerable source of renewable and bio-based carbon. Pulping processes enable lignin, together with all components of the lignocellulosic biomass, to enter valorizable streams. A current key objective...
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Facile and sustainable synthesis of sodium lignosulfonate derived hierarchical porous carbons for supercapacitors with high volumetric energy density

Thu, 07/20/2017 - 06:09
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01434A, PaperJie Pang, Wenfeng Zhang, Jinliang Zhang, Gaoping Cao, Mingfang Han, Yusheng Yang
Interconnected hierarchical porous carbon was successfully prepared by directly carbonization of industrial waste sodium lignosulfonate without additional templating and activation agent. The as-prepared carbon sample shows a moderate specific surface...
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The carbon nanotube formation parameter space: data mining and mechanistic understanding for efficient resource use

Thu, 07/20/2017 - 06:09

Green Chem., 2017, Advance Article
DOI: 10.1039/C7GC01421J, PaperWenbo Shi, Ke Xue, Eric R. Meshot, Desiree L. Plata
Data-mining of the carbon nanotube growth parameters informed strategies to reduce energy and resource consumption for chemical vapor deposition processes.
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Immobilization engineering - How to design advanced sol-gel systems for biocatalysis?

Wed, 07/19/2017 - 13:54
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC00896A, PaperDiana Weiser, Flora Nagy, Gergely Banoczi, Mark Olah, Attila Farkas, Andras Szilagyi, Krisztina Laszlo, Akos Gellert, Gyorgy Marosi, Sandor Kemeny, Laszlo Poppe
Immobilization engineering approach using bioinformatics and experimental design tools was applied to improve sol-gel enzyme entrapment methodology. This strategy was used for immobilization of lipase B from Candida antarctica (CaLB),...
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One-pot Integrated Processing of Biopolymers to Furfurals in Molten Salt Hydrate: Understanding Synergy in Acidity

Wed, 07/19/2017 - 09:52
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01709J, PaperSunitha Sadula, Owen Oesterling, Andrew Nardone, Brian Dinkelacker, Basudeb Saha
Furfural and 5-hydroxymethylfurfual (HMF), promising renewable platforms for bio-products, manufacturing with high carbon efficiency is a challenge because of their undesired polymerization to humins. Here, we present an integrated process...
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An introduction to zwitterionic salts

Wed, 07/19/2017 - 05:49

Green Chem., 2017, Advance Article
DOI: 10.1039/C7GC01523B, CommunicationMarijana Blesic, Brendan F. Gilmore, John D. Holbrey, Johan Jacquemin, Gaelle Level, Peter Nockemann, Lorenzo Stella
Zwitterionic salts: highly hydrophilic materials, incorporating some characteristics of zwitterions, ionic liquids, and inorganic salts with potential applications in the biomedical field and separation technology.
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Conversion of C5 carbohydrates into furfural catalyzed by a Lewis acidic ionic liquid in renewable [gamma]-valerolactone

Tue, 07/18/2017 - 05:27
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01298E, PaperShurong Wang, Yuan Zhao, Haizhou Lin, Jingping Chen, Lingjun Zhu, Zhongyang Luo
For the purpose of building a green reaction system to produce furfural (FF), the conversion of two important pentoses from hemicellulose, namely xylose and arabinose, was investigated in an aqueous...
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Categories: Green Technology News

Synergizing graphene oxide with microwave irradiation for efficient cellulose depolymerization into glucose

Mon, 07/17/2017 - 14:17
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01691C, PaperElaine Gabutin Gabutin Mission, Armando T. Quitain, Mitsuru Sasaki, Tetsuya Kida
The abundance in hydroxyl groups neighboring the hydrolytic site ([small beta]-1,4 glycosidic bonds) in cellulose forms a tightly packed crystalline structure, and hence, is a major challenge in cellulose depolymerization into...
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Categories: Green Technology News

Potassium isopropyl xanthate (PIX): an ultra-efficient palladium scavenger

Mon, 07/17/2017 - 08:13

Green Chem., 2017, Advance Article
DOI: 10.1039/C7GC01765K, CommunicationHong Ren, Christopher A. Strulson, Guy Humphrey, Rong Xiang, Guangtao Li, Donald R. Gauthier, Kevin M. Maloney
The increasing employment of palladium-catalyzed reactions in the synthesis of active pharmaceutical ingredients (APIs) has created a pressing need for ultra-efficient palladium removal of the resulting metal contaminants.
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Bioprivileged molecules: creating value from biomass

Mon, 07/17/2017 - 08:13

Green Chem., 2017, 19,3177-3185
DOI: 10.1039/C7GC00296C, PerspectiveBrent H. Shanks, Peter L. Keeling
Bioprivileged molecules generated from biomass can be converted to both novel molecules and drop-in replacements.
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Categories: Green Technology News

A Two Phase System for Clean and High Yield Synthesis of Furylmethane Derivatives over -SO3H Functionalized Ionic Liquids

Fri, 07/14/2017 - 09:20
Green Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7GC01654A, PaperSuhas H. Shinde, C. V. Rode
We report here a new and effective unique two-phase reaction system for high yield production of tri(furyl)methane from furfural and furan. This strategy included acidic aqueous phase (water + -SO3H...
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