Hydrothermal synthesis of boron-free Zr-MWW and Sn-MWW zeolites as robust Lewis acid catalysts

2020 ◽  
Vol 56 (34) ◽  
pp. 4696-4699
Author(s):  
Zhiguo Zhu ◽  
Yejun Guan ◽  
Haikuo Ma ◽  
Hao Xu ◽  
Jin-gang Jiang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Lewis Acid ◽  
Acid Catalysts ◽  
Oxidation Reactions ◽  
Lewis Acid Catalysts ◽  
Structure Directing Agent ◽  
Catalytic Behavior ◽  
Dual Structure ◽  
Villiger Oxidation

Boron-free Zr-MWW and Sn-MWW metallosilicates were synthesized via dual structure-directing agent-facilitated crystallization, which demonstrated unique catalytic behavior in Meerwein–Pondorf–Verley and Baeyer–Villiger oxidation reactions.

Hydrothermal synthesis of Sn-Beta zeolites in F−-free medium

2018 ◽  
Vol 5 (11) ◽  
pp. 2763-2771 ◽  
Author(s):  
Hao Xu ◽  
Xudong Wang ◽  
Peng Ji ◽  
Haihong Wu ◽  
Yejun Guan ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Lewis Acid ◽  
Crystal Size ◽  
Acid Catalysts ◽  
Free Medium ◽  
Lewis Acid Catalysts ◽  
Structure Directing Agent ◽  
Highly Active ◽  
Beta Zeolites

Sn-Beta zeolites, with high Sn content and smaller crystal size, hydrothermally synthesized in F−-free medium using N-cyclohexyl-N,N-dimethylcyclohexanaminium hydroxide as the structure-directing agent with the assistance of Na+ and seed, are highly active as Lewis acid catalysts.

Controllably Confined ZnO on USY Zeolites (USY@ZnO/Al2 O3 ) as Efficient Lewis Acid Catalysts for Baeyer-Villiger Oxidation

2018 ◽  
Vol 13 (9) ◽  
pp. 1213-1222 ◽  
Author(s):  
Bo Wang ◽  
Hao Xu ◽  
Yu Ding ◽  
Zhiguo Zhu ◽  
Darui Wang ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
Villiger Oxidation

Assessment of fluoroalkyltin compounds as fluorous Lewis acid catalysts

2003 ◽  
Vol 17 (10) ◽  
pp. 795-799 ◽  
Author(s):  
Yasuo Imakura ◽  
Satoru Nishiguchi ◽  
Akihiro Orita ◽  
Junzo Otera
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts

ChemInform Abstract: Calcium-Based Lewis Acid Catalysts

ChemInform ◽  
2013 ◽  
Vol 44 (40) ◽  
pp. no-no
Author(s):  
Jeanne-Marie Begouin ◽  
Meike Niggemann
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts

Catalyzed Orientation Reversals in Diels–Alder Reactions

1975 ◽  
Vol 53 (4) ◽  
pp. 616-618 ◽  
Author(s):  
Žarko Stojanac ◽  
Robert A. Dickinson ◽  
Nada Stojanac ◽  
Ronald J. Woznow ◽  
Zdenek Valenta
Keyword(s):  
Lewis Acid ◽  
Diels Alder ◽  
Acid Catalysts ◽  
Acid Salt ◽  
Lewis Acid Catalysts ◽  
Preferential Formation ◽  
Orientation Reversal

Lewis acid catalysts cause an orientation reversal in the Diels–Alder additions of 2,6-di-methyl-1,4-quinone (1) and toluquinone (12) to 1-substituted 1,3-butadienes and to 1,2- and 1,3-dialkyl dienes. These results are explained by the preferential formation of one reactive quinone–Lewis acid salt.

Supported Lewis Acid Catalysts Based on Polyolefin Thermoplastics

1993 ◽  
pp. 87-99 ◽  
Author(s):  
T. C. Chung ◽  
A. Kumar ◽  
F. Chen ◽  
J. Stanat
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts
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