Acetylation of 2-Methoxynaphthalene in the Presence of Beta Zeolites: Influence of Reaction Conditions and Textural Properties of the Catalysts

doi:10.1023/A:1022145814145

Paper

Acetylation of 2-Methoxynaphthalene in the Presence of Beta Zeolites: Influence of Reaction Conditions and Textural Properties of the Catalysts

Published Feb 1, 2003 · P. Moreau, A. Finiels, Pascal Meric

Catalysis Letters

Q2 SJR score

20

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

The Friedel-Crafts acetylation of 2-methoxynaphthalene (2-MN) in the liquid phase has been studied over three H-beta zeolite catalysts, featuring the same composition and acidity, but exhibiting different textural characteristics. The various catalysts led to significantly different yields of acetylated products, 1-acetyl-2-methoxynaphthalene (1-Ac-2-MN) and 2-acetyl-6-methoxynaphthalene (2-Ac-6-MN). On the basis of the relationship between the product yields and the textural characteristics of the samples, the formation of the two acetylated products has been assumed to occur at different locations: inside the micropores in the case of 2-Ac-6-MN and on the outer surface of the crystals in the case of 1-Ac-2-MN.The influences of the temperature of the reaction and of the polarity of the solvent have been also examined. Under our conditions, products were formed via parallel reactions whatever the temperature and no consecutive and secondary reactions occurred. An increase of the solvent polarity led to a decrease of both catalytic activity and 2-Ac-6-MN/1-Ac-2-MN yield ratio. Such a result has been explained by a competitive adsorption between solvent and reactants on the active sites, which is more pronounced in the micropores.

Study Snapshot

Acetylation of 2-methoxynaphthalene in liquid phase with H-beta zeolite catalysts leads to different yields of 1-Ac-2-MN and 2-Ac-6-MN, with different locations for formation, influenced by temperature, solvent polarity, and solvent

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Sign up to use Study Snapshot

Consensus is limited without an account. Create an account or sign in to get more searches and use the Study Snapshot.

Create an account

Paper

Acetylation of 2-Methoxynaphthalene in the Presence of Beta Zeolites: Influence of Reaction Conditions and Textural Properties of the Catalysts

Sign up to use Study Snapshot

References

Kinetics of 2-methoxynaphthalene acetylation with acetic anhydride over dealuminated HY zeolites

The Friedel-Crafts acetylation of 2-methoxynaphthalene with acetic anhydride over HY zeolites leads to the selective formation of 1-acetyl-2-methoxynaphthalene, with 2-methoxynaphthalene acting

Acetylation of 2-methoxynaphthalene with acetic anhydride over a HBEA zeolite

Acetylation of 2-methoxynaphthalene with acetic anhydride over a HBEA zeolite can produce 1-acetyl-2-methoxynaphthalene, a precursor to the anti-inflammatory Naproxen, with high yields when operating at high temperatures

Acetylation of 2-methoxynaphthalene with acetic anhydride over a series of dealuminated HBEA zeolites

Acetylation of 2-methoxynaphthalene with acetic anhydride on dealuminated HBEA zeolites leads to 1-acetyl-2-methoxynaphtalene, with maximum activity at a Si/Al ratio between 20 and 35.

Friedel–Crafts acylation of 2-methoxynaphthalene over zeolite catalysts

Friedel-Crafts acylation of 2-methoxynaphthalene over zeolite catalysts produces 1-Acyl-2-methoxynaphthalene and 6-acyl-2-methoxynaphthalene, with product selectivity influenced more by acylating

Highly selective Friedel–Crafts acylation of 2-methoxynaphthlene catalyzed by H-BEA zeolite

H-BEA zeolite catalyzes the Friedel-Crafts acylation of 2-methoxynaphthalene, with increased selectivity towards the 6-acyl-2-methoxy isomer and increased catalyst/substrate ratio.

Citations

Investigation of the Hβ Molecular Sieve Inactivation Caused by Reactants and Products and Improvement of Continuous Thiophene Acylation

Continuous thiophene acylation can be improved by optimizing molar ratio and volume flowrate, reducing energy barrier, and using carbon tetrachloride as a solvent, achieving higher productivity and conversion rate.

Optimization for catalytic performances of Hβ zeolite in the acylation of 2-methylfuran by surface modification and solvents effect

Surface modification of H zeolite and 1,2-dichloroethane enhance catalytic stability in the acylation of 2-methylfuran, with a 1:1 ratio of strong to weak acids influencing stability.

Methods to delay deactivation of zeolites on furan acylation: continuous liquid-phase technology and solvent effects

Lower liquid velocity and stronger polarity of the solvent enhance the catalytic activity and stability of H-beta zeolite in furan acylation, with carbon deposits being the main reason for deactivation.

SnO2–SiO2 Mesoporous Composite: A Very Active Catalyst for Regioselective Synthesis of Aromatic Ketones with Unusual Catalytic Behavior

The SnO2–SiO2 mesoporous composite catalyst (PS-4) effectively synthesizes aromatic ketones with unusual catalytic behavior, outperforming other catalysts in the Friedel-Crafts reaction.

Opportunities for zeolites in biomass upgrading—Lessons from the refining and petrochemical industry

Zeolites show potential as catalysts in biomass upgrading processes, benefiting society and reducing waste and emissions while improving the conversion of renewable raw materials.