Hydrophobicity and co-solvent effects on Meerwein-Ponndorf-Verley reduction/dehydration cascade reactions over Zr-zeolite catalysts

@article{Zhang2021HydrophobicityAC,
  title={Hydrophobicity and co-solvent effects on Meerwein-Ponndorf-Verley reduction/dehydration cascade reactions over Zr-zeolite catalysts},
  author={Hongwei Zhang and Zhan Jiang Quek and Stephan Jaenicke and Gaik‐Khuan Chuah},
  journal={Journal of Catalysis},
  year={2021},
  volume={400},
  pages={50-61}
}
Abstract Trans-anethole is an important ingredient in many flavors, fragrances and pharmaceutical formulations. Heterogeneous catalysis provides the opportunity for its green synthesis from 4’-methoxypropiophenone via a cascade of Meerwein-Ponndorf-Verley reduction followed by dehydration. Zr-containing zeolites were especially active catalysts. Surprisingly, Zr-HY was more active than Zr-Beta or mesoporous Zr-MSU. The effect of pore size, hydrophobicity and co-solvent has been investigated… 
Identification and quantification of distinct active sites in Hf-Beta zeolites for transfer hydrogenation catalysis
Despite the significant progress made in characterizing different framework heteroatom sites that exist in Lewis acidic zeolites with probe molecule adsorption and spectroscopy, methods to reliably

References

SHOWING 1-10 OF 79 REFERENCES
Chemo- and regioselective Meerwein–Ponndorf–Verley and Oppenauer reactions catalyzed by Al-free Zr-zeolite beta
Abstract Al-free Zr-beta zeolite with Si/Zr up to 75 was synthesized in a fluoride medium. The incorporation of zirconium into zeolite beta induced the formation of increased amounts of polymorph B.
Post-synthesized zirconium-containing Beta zeolite in Meerwein–Ponndorf–Verley reduction: Pros and cons
Abstract Zr-Beta zeolite was prepared by a two-step post-synthesis method involving dealumination of Al-Beta followed by wet impregnation with Zr(NO3)4. Compared with Zr-Beta formed under
A Dual-Functional Catalyst for Cascade Meerwein-Pondorf-Verley Reduction and Dehydration of 4'-Methoxypropiophenone to Anethole.
TLDR
Through design of the reactions and catalyst, 4'-methoxypropiophenone can be efficiently converted to anethole in a sustainable and green manner.
Zr-SBA-15 Lewis Acid Catalyst: Activity in Meerwein Ponndorf Verley Reduction
Zr-SBA-15 Lewis acid catalyst has demonstrated an outstanding catalytic activity in the reduction of several carbonyl compounds by means of Meerwein Ponndorf Verley (MPV) reaction, using several
SOLVENT EFFECTS IN LIQUID-PHASE FRIEDEL-CRAFTS ALKYLATION OVER ZEOLITES - CONTROL OF REACTION-RATE AND SELECTIVITY BY ADSORPTION
The effect os solvent polarity on reaction rate and selectivity in the cyclohexylation of phenol over an ultrastable Y zeolite is analyzed in terms of its effect on the adsorption of reagents and
Meerwein–Ponndorf–Verley–Oppenauer reaction of crotonaldehyde with ethanol over Zr-containing catalysts
Abstract A series of Zr-containing catalysts including bulk ZrO 2 , ZrO 2 supported on silica, titania and ceria, Zr-BEA zeolite and Zr-MCM-41 mesoporous material was prepared and characterized by
Zr-USY zeolite: Efficient catalyst for the transformation of xylose into bio-products
Abstract A series of bifunctional USY zeolite catalysts with different Al/Zr ratios were synthesised. The incorporation of Zr into the structure was accomplished after partial dealumination of H-USY.
A combo Zr-HY and Al-HY zeolite catalysts for the one-pot cascade transformation of biomass-derived furfural to γ-valerolactone
Abstract A highly efficient catalyst system was developed for the one-pot transformation of furfural to γ-valerolactone (GVL) in an open system. The cascade of two Meerwein Ponndorf Verley (MPV)
Potential applications of Zr-KIT-5: Hantzsch reaction, Meerwein–Ponndorf–Verley (MPV) reduction of 4-tert-butylcyclohexanone, and Prins reaction of citronellal
The acidity of Zr-incorporated large pore cubic mesoporous silicate, KIT-5, with Fm3m symmetry was explored as catalyst in the Hantzsch reaction for preparation of 1,4-dihydropyridine (DHP)
Sn-zeolite beta as a heterogeneous chemoselective catalyst for Baeyer–Villiger oxidations
The Baeyer–Villiger oxidation, first reported more than 100 years ago, has evolved into a versatile reaction widely used to convert ketones—readily available building blocks in organic chemistry—into
...
1
2
3
4
5
...