Results 71 to 80 of about 4,036 (208)

Heterocoagulation of Inorganic Pigments for Solvent‐Based Recycling of Polystyrene

ChemSusChem, Volume 19, Issue 9, 14 May 2026.
Heterocoagulation is demonstrated as an effective strategy for removing inorganic pigments from polymer solutions in solvent‐based recycling. High turbidity reductions are achieved using selected heterocoagulants, even in the presence of dissolved polymer.
Elisabetta Carrieri, Sibel Ügdüler, Olivier Lampaert, Richard Hoogenboom, Steven De Meester   +4 more
wiley   +1 more source

The chemistry of ynol and thioynol ethers [PDF]

, 2016
Alkynyl ethers and alkynyl thioethers (‘ynol ethers’ and ‘thioynol ethers’) are appealing building-blocks in synthetic chemistry due to their ease of manipulation and predictable reactivity.
Gray, VJ, Wilden, JD
core   +1 more source

Cyclohexanone 2,4-dinitrophenylhydrazone

Acta Crystallographica Section E Structure Reports Online, 2003
Crystals of the title compound, C12H14N4O4 were obtained by a condensation reaction between cyclo­hexanone and 2,4-di­nitro­phenyl­hydrazine. Within the di­nitro­phenyl group, the distances of 1.420 (2) and 1.422 (2) A for the C—C bonds close to the imino group are appreciably longer than the average distance of 1.377 (2) A for the rest of the C—C ...
Shang Shan, Duan-Jun Xu, Wei-Xiao Hu
openaire   +1 more source

Studies on Selective Hydrogenation of Levulinic Acid and Paracetamol over Supported Ruthenium and Palladium Catalysts [PDF]

, 2016
本论文以重要的生物质平台化合物乙酰丙酸（LA）加氢制备γ-戊内酯（GVL）以及对乙酰氨基苯酚选择加氢制备酮为目标，针对选择性加氢的控制，系统研究了碳材料负载钌催化剂上乙酰丙酸加氢性能及硅烷化改性SiO2负载钯基催化剂上对乙酰氨基苯酚的加氢性能。通过对催化剂的结构和性质进行较为系统的表征并与其催化活性进行关联，取得了以下主要结果。 论文针对LA选择加氢制备GVL的研究，比较了不同载体，包括不同碳材料及无机氧化物负载钌催化剂的反应性能。实验结果显示，反应产物GVL选择性均较高，达到99%以上 ...
宋文静
core  

Glyoxylic Acid versus Ethyl Glyoxylate for the Aqueous Enantio­selective Synthesis of α-Hydroxy-γ-Keto Acids and Esters by the N-Tosyl-(S a)-binam-l-prolinamide-Organocatalyzed Aldol Reaction [PDF]

, 2015
N-Tosyl-(S a)-binam-l-prolinamide is an efficient catalyst for the aqueous aldol reaction between ketones and glyoxylic acid, as the monohydrate or as an aqueous solution, or a 50% toluene solution of ethyl glyoxylate.
Guillena, Gabriela, Gómez Bengoa, Enrique, Navarro Moles, Fernando Javier, Nájera, Carmen   +3 more
core   +2 more sources

Integrated Valorization of Waste Biomass via Low‐Temperature Pyrolysis and Biochar Application as Heterogeneous Catalyst for SAF Production

Advanced Sustainable Systems, Volume 10, Issue 5, May 2026.
A biorefinery approach integrates the valorization of agri‐food waste through low‐temperature pyrolysis. The process concurrently yields functional liquid fractions and versatile biochars, which undergo extensive characterization to evaluate their potential in diverse technological applications. These materials serve as efficient renewable catalysts in
Nicola Schiaroli, Lorenzo Scaglione, Marzia Ortelli, Sonia Blasioli, Ilaria Braschi, Sandro Recchia, Massimo Mella, Carlo Lucarelli   +7 more
wiley   +1 more source

Cycloaddition Reactions of Carbonyl Compounds Possessing High Energy Content [PDF]

, 1971
Detailed structure and kinetic analyses of the photocycloaddition of alkanones to (a) α,β-unsaturated nitriles and (b) enol ethers have been performed. The excited singlet states of alkanones were found to add stereospecifically and regiospecifically to ...
Turro, Nicholas J.
core   +2 more sources

Substrate Walking for Selective Ene Reduction

ChemCatChem, Volume 18, Issue 9, 14 May 2026.
Ene‐reductases (EREDs) efficiently reduce activated C═C bonds. Expanding the current application, they catalyze the selective reduction of highly substituted cyclohexenones. Immobilized, they were scaled to 200 mL, achieving full substrate conversion without enzyme degradation. ABSTRACT Ene‐reductases (EREDs) efficiently reduce activated C═C bonds, but
Hugo Brasselet, Jonathan Berger, Elisa Arends, Adriaan de Man, Laura van der Weel, Hessel van Dijk, Anke Hummel, Harald Gröger, Ulf Hanefeld   +8 more
wiley   +1 more source

Aqueous Enantioselective Aldol Reaction of Methyl- and Phenylglyoxal Organocatalyzed by N-Tosyl-(S a)-binam-l-prolinamide [PDF]

, 2015
The direct aldol reaction between methylglyoxal (40% aqueous solution) or phenylglyoxal monohydrate and ketones or aldehydes is catalyzed by N-tosyl-(S a)-binam-l-prolinamide to afford the corresponding chiral γ-oxo-β-hydroxy carbonyl compounds, mainly ...
Guillena, Gabriela, Navarro Moles, Fernando Javier, Nájera, Carmen   +2 more
core   +2 more sources

Comprehensive Evaluation of Fructus Tsaoko, Seeds of Tsaoko Fructus and Ginger Made Seeds of Tsaoko Fructus Based on Drug‐Like Compounds and Aroma Analysis

Food Science &Nutrition, Volume 14, Issue 5, May 2026.
This study mainly consists of two parts. First, after screening for drug‐like metabolites via LC–MS and GC–MS, a comprehensive evaluation model was established using a principal component analysis‐based weighted scoring method, by which the drug‐likeness ranking of three samples was determined.
Han Chen, Meiquan Yang, Weize Yang, Mingju Qi, Zongliang Xu, Tianmei Yang, Jinyu Zhang   +6 more
wiley   +1 more source