Results 61 to 70 of about 12,453 (230)
Chemistry – A European Journal, EarlyView.The origin of the unusual regioselectivity in the Mg‐catalyzed cyclization of azadiene‐type imines with cyclopropanes is elucidated by DFT calculations. Although five‐membered rings are typically favored, energy decomposition analysis reveals that severe steric congestion induces a highly distorted transition state, rendering the five‐membered pathway ...
Ryo Kobayashi +5 more
wiley +1 more source
Solvolysis pulping of hardwoods.
JAPAN TAPPI JOURNAL, 1988 Beechwood and birchwood as hardwoods were subjected to solvolysis pulping using cresols and water (CW) (7 : 3 or 1 : 1 by volume) including small amounts of acetic acid (A). When beechwood chips were cooked with CW (7 : 3) including 10% of A (based on chips) for 3 hr at 170°C, the chips produced pulps with the highest selectivity of delignification and
Yoshihiro Sano +2 more
openaire +2 more sources
Chemistry – A European Journal, EarlyView.Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis +2 more
wiley +1 more source
NaY Zeolite: A Useful Catalyst for Nitrile Hydrolysis
Molecules, 2000 The NaY zeolite catalysed hydrolysis of nitriles to primary amides is reported. It is found that aryl nitriles with strong electron-withdrawing substituents and cyanopyridines are readily hydrolysed in the water suspension, while aliphatic nitriles do ...
Bogdan A. Ã…Â olaja +3 more
doaj +1 more source
Integrated Selective Depolymerization and Downstream Processing for Mixed Polyester Waste, Part 1
Chemie Ingenieur Technik, EarlyView.Chemical recycling of mixed plastics by hydrolysis generates dilute monomer mixtures requiring complex downstream purification. To overcome this challenge, upstream selectivity is targeted. Tailored reaction conditions enable cascaded depolymerization which is shown for a PLA/PET model system.
Fabian Roweda, Filip Latz, Andreas Jupke
wiley +1 more source
ChemSusChem, Volume 18, Issue 6, March 15, 2025.The product profile of enzymatically hydrolyzed PET can be modified by medium engineering and thereby adapted to a desired product. TPA, MHET or BHET can be forced as the predominant product using a basic pH (blue), 25 % ethylene glycol (EG) and IsPETasewt (green) or ≥25 % EG and LCCICCG (pink), respectively.
Tobias Heinks +8 more
wiley +1 more source
ChemistryOpen, 2022 The DHBD quantity represents the hydroxyl group density of alcoholic solvents or water. DHBD is purely physically defined by the product of molar concentration of the solvent (N) and the factor Σn=n×f which reflects the number n and position (f‐factor ...
Prof. Dr. Stefan Spange +2 more
doaj +1 more source
SNAr Reactions on 2-Amino-4,6-dichloropyrimidine-5-carbaldehyde
Molbank, 2022 We report the experimental results of unexpected aromatic nucleophilic substitution reaction products on 2-amino-4,6-dichloropyrimidine-5-carbaldehyde.
Jorge Trilleras +2 more
doaj +1 more source
The recycling of OMC's carbon reinforcement by solvolysing thermoset matrix. A way of sustainability for composites. [PDF]
, 2014 Originally developed for high-tech applications, carbon fibre/thermoset matrix composites have been increasingly used in leisure and sports industries, for several years.
AYMONIER, Cyril +5 more
core +3 more sources
A Direct Method to Prepare Zwitterionic Organotrifluoroborates: Ammonium and Sulfonium Derivatives
European Journal of Organic Chemistry, EarlyView.Organotrifluoroborates find applications in synthesis, diagnostics, and theranostics. This study outlines a one‐step reaction for producing ammonium and sulfonium trifluoroborate zwitterion derivatives. This method achieves satisfactory yields without the need for expensive reagents.
Vanessa Re +6 more
wiley +1 more source