Results 51 to 60 of about 5,717,411 (161)

Diffusion Resistances and Contribution of Surface Diffusion in TAME and TAEE Production Using Amberlyst-15

open access: yes, 2003
Effective diffusivities and adsorption equilibrium constants of methanol, ethanol and 2-methyl-2-butene (2M2B), in Amberlyst 15, were evaluated from batch adsorption experiments.
DOĞU, TİMUR   +4 more
core   +3 more sources

Solvent-free dehydration, cyclization, and hydrogenation of linalool with a dual heterogeneous catalyst system to generate a high-performance sustainable aviation fuel

open access: yesCommunications Chemistry, 2022
Sustainable aviation fuels offer the opportunity to both reduce CO2 emissions and produce fuels with superior properties to conventional petroleum-based fuels.
C. Luke Keller   +3 more
doaj   +1 more source

Efficient One‐Pot Synthesis of 1,2,4,5‐Tetrasubstituted Imidazoles Using GO@SiO2@[(CH2)3Im][Cl] as a Novel Nanocomposite Under MW Irradiation

open access: yesChemistryOpen, Volume 15, Issue 9, September 2026.
This study presents the development of a novel nanocomposite catalyst, GO@SiO2@[(CH2)3Im][Cl], for the efficient one‐pot synthesis of 1,2,4,5‐tetrasubstituted imidazoles under environmentally benign conditions. The catalyst design incorporates graphene oxide, silica, and an imidazolium‐functionalized layer, creating a unique catalytic environment for ...
Mohamed Abu Shuheil   +8 more
wiley   +1 more source

Efficient One‐Pot Synthesis of Dibenzoxanthenes Using a Vinylimidazolium‐Based Brønsted Acidic Ionic Liquid [VSBIM][Cl]: In Silico Evaluation of Drug‐Likeness, ADMET Properties, PASS Analysis, Antiviral Activity Prediction, and Molecular Docking Studies

open access: yesChemistryOpen, Volume 15, Issue 8, August 2026.
An efficient and solvent‐free sustainable one‐pot protocol is developed for the synthesis of broad range of dibenzoxanthenes using 5 mol% Bronsted acidic ionic liquid [VSBIM][Cl]. The versatility of the methodology was demonstrated by the effective synthesis of 19 dibenzoxanthene derivatives up to 90%–95% yields.
Talamarlla Deepthi, Barnali Maiti
wiley   +1 more source

Resinas sulfônicas: síntese, caracterização e avaliação em reações de alquilação [PDF]

open access: yesPolímeros, 2003
Três resinas catiônicas (Amberlyst 15, Lewatit SPC 112, ambas comerciais e MLS 07, sintetizada em laboratório) foram utilizadas como catalisadores em reação de alquilação.
Fernanda M.B. Coutinho   +5 more
doaj  

Pharmaceuticals Made with Hydrogen: A Sustainable and Efficient Approach Using Flow Synthesis

open access: yesChemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
We demonstrate a sustainable strategy for pharmaceutical manufacturing by combining hydrogen, heterogeneous catalysis, and continuous flow synthesis. The development of novel catalysts and their application in a multi‐step synthesis of donepezil enabled a highly productive process with no intermediate purification.
Shū Kobayashi, Haruro Ishitani
wiley   +1 more source

Enantiospecific Acid‐Catalysed Hydroperoxidation of Scalemic Tertiary Benzylic Alcohols Facilitating a Concise Asymmetric Synthesis of Yingzhaosu C

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 26, 13 July 2026.
Asymmetric synthesis of antimalarial yingzhaosu C was achieved in 4–5 steps by asymmetric Grignard synthesis of (R)‐gossonorol followed by novel enantiospecific hydroperoxidation. We report a concise asymmetric synthesis of antimalarial yingzhaosu C in 59% ee.
Saranna E. Kavanagh   +2 more
wiley   +1 more source

The Role of Intraparticle Diffusion in Kinetic Model Discrimination: Proof of Concept Testing for Methanol Dehydration

open access: yesAsia-Pacific Journal of Chemical Engineering, Volume 21, Issue 4, July/August 2026.
ABSTRACT The rate of a heterogeneous catalytic process may simultaneously be described by several rate equations. In this case, discrimination between the plausible kinetic models is required. An intrinsic kinetic model of a heterogeneous catalytic process may successively be discriminated by the transition from a reaction rate‐limited regime to an ...
Oleksii Zhokh   +2 more
wiley   +1 more source

Liquid phase synthesis of MTBE from methanol and isobutene over acid zeolites and amberlyst-15

open access: yes, 1999
The liquid phase synthesis of methyl tert-butyl ether (MTBE) from methanol and isobutene over II-Beta and US-Y zeolite catalysts was studied in the temperature range 30-120 degrees C.
Collignon, F.   +4 more
core   +1 more source

Improvements in the acylation of 3-methylindole using amberlyst-15

open access: yes, 2020
A simple and efficient methodology for Friedel-Crafts acylation of 3-methylindole using Amberlyst 15 resin as catalyst is described. This methodology shows good selectivity towards the for-mation of the products of 2-acylation, (3-methyl-1H-indol-2-yl ...
Cánepa, Alicia Susana   +2 more
core   +1 more source

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