scholarly journals Tin(IV)-Porphyrin Tetracarbonyl Cobaltate: An Efficient Catalyst for the Carbonylation of Epoxides

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 311 ◽  
Author(s):  
Ek Raj Baral ◽  
Dongwook Kim ◽  
Sunwoo Lee ◽  
Myung Hwan Park ◽  
Jeung Gon Kim
Keyword(s):  
Catalytic System ◽  
Molecular Structures ◽  
Turnover Number ◽  
Cobalt Carbonyl ◽  
Efficient Catalyst ◽  
Catalytic Reactivity ◽  
Tin Porphyrin

Cationic tin(IV) porphyrins with tetracarbonyl cobaltates were synthesized, exhibiting bifunctional catalytic reactivity. The Lewis acidic tin-porphyrin center activated epoxides; concurrently, cobalt carbonyl anions efficiently opened epoxides and delivered carbonyl moieties. Thus, a series of β-lactones with a high synthetic value were obtained. This catalytic system showed excellent efficiency exceeding a turnover number of one thousand with a broad substrate scope. In addition, the presented tin porphyrin-based catalyst exhibited exclusive chemoselectivity to terminal epoxides over internal ones. The selective carbonylation of di-epoxides demonstrated the usefulness of these catalysts in the synthesis of complex molecular structures.

Degradation of the active species in the catalytic system Pd(OAc)2/NEt3

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103088-103094 ◽  
Author(s):  
Jesús Sanmartín-Matalobos ◽  
Concepcion González-Bello ◽  
Lucía Briones-Miguéns ◽  
Matilde Fondo ◽  
Ana M. García-Deibe
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Active Species ◽  
Efficient Catalyst ◽  
Ambient Humidity ◽  
Oxidation Of Alcohols

The degradation under ambient humidity and room temperature of Pd(OAc)2(NEt3), which is an efficient catalyst for the aerobic oxidation of alcohols, to diethylamine and acetaldehyde derivatives is disclosed.

scholarly journals Ruthenium Nanoparticles Intercalated in Montmorillonite (nano-Ru@MMT) Is Highly Efficient Catalyst for the Selective Hydrogenation of 2-Furaldehyde in Benign Aqueous Medium

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 66
Author(s):  
Farooq-Ahmad Khan ◽  
Sana Yaqoob ◽  
Nourina Nasim ◽  
Yan Wang ◽  
Muhammad Usman ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Furfuryl Alcohol ◽  
Research Area ◽  
Green Solvents ◽  
Important Research ◽  
Ruthenium Nanoparticles ◽  
Turnover Number ◽  
Efficient Catalyst ◽  
Chemoselective Hydrogenation ◽  
Important Research Area

Chemoselective hydrogenation of 2-furaldehyde to furfuryl alcohol using green solvents is an important research area to get eco-friendly fuels and fine chemicals. Herein, we report ruthenium nanoparticles (~1.8 nm) intercalated in montmorillonite as an efficient catalytic system, which can selectively hydrogenate 2-furaldehyde in a benign aqueous medium. The complete conversion was observed at 40 °C with 1 MPa H2, the selectivity of furfuryl alcohol being >99%, and turnover number 1165. After a catalytic run, the montmorillonite-supported ruthenium nanoparticles can be recycled and reused without losing their activity and selectivity.

Syntheses and molecular structures of new ferrocenylacetylide-bridged binuclear cobalt carbonyl cluster compounds

2004 ◽  
Vol 57 (17-18) ◽  
pp. 1591-1601 ◽  
Author(s):  
Quan-Ling Suo ◽  
Li-Min Han ◽  
Yi-Bing Wang ◽  
Jie-Hui Ye ◽  
Ning Zhu ◽  
...  
Keyword(s):  
Molecular Structures ◽  
Cluster Compounds ◽  
Carbonyl Cluster ◽  
Cobalt Carbonyl

scholarly journals Benzoylation of aryl methyl ether using catalytic system of Gd(OTf)3/MSAA

2015 ◽  
Vol 18 (2) ◽  
pp. 221-227
Author(s):  
Phuong Hoang Tran ◽  
Hai Truong Nguyen ◽  
Thach Ngoc Le
Keyword(s):  
Microwave Irradiation ◽  
Benzoic Acid ◽  
Organic Synthesis ◽  
Catalytic System ◽  
Aromatic Compounds ◽  
Good Yield ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Work Up ◽  
Aryl Methyl

The Friedel-Crafts acylation is an important reaction in organic synthesis. Benzoylation of aromatic compounds with benzoic acid as acylating reagent using catalytic system of Gd(OTf)3/MSAA was investigated under microwave irradiation. Catalytic system of Gd(OTf)3/MSAA was found to be an efficient catalyst for FriedelCrafts benzoylation under mild conditions. In addition, Gd(OTf)3/MSAA is safe-to-handle, simple clean work-up and gives good yield.

scholarly journals Calcium Chloride/HCl an Efficient Co-Catalytic System for Synthesis Xanthene under Microwave Condition

2018 ◽  
Vol 62 (1) ◽  
Author(s):  
Pramod Kulkarni
Keyword(s):  
Cost Effectiveness ◽  
Reaction Time ◽  
Calcium Chloride ◽  
Catalytic System ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Xanthene Derivatives ◽  
One Pot Condensation ◽  
Operational Simplicity

Calcium chloride  along with one drop of concentrated HCl is a facile and efficient catalyst for the synthesis of aryl 14<em>H</em>-dibenzo[<em>a,j</em>] xanthene derivatives via one-pot condensation  of various substituted benzaldehydes and β-naphthol under microwave and solvent-free conditions. The advantages offered by the present protocol include shorter reaction time, good‑to‑excellent yields, operational simplicity, cost-effectiveness, and easily available catalysts.

scholarly journals Novel Cobalt Complex as an Efficient Catalyst for Converting CO2 into Cyclic Carbonates under Mild Conditions

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 951
Author(s):  
Wei Fan ◽  
Wen-Zhen Wang ◽  
Li Wang ◽  
Xin-Gang Jia ◽  
Lei-Lei Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic System ◽  
Catalytic Mechanism ◽  
Cobalt Complex ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Cyclic Carbonates ◽  
Efficient Catalyst ◽  
Metal Centers ◽  
Mild Conditions

Based on the ligand H2dpPzda (1), a novel cobalt complex [Co(H2dpPzda)(NCS)2]·CH3OH(2) has been synthesized and characterized. The Complex 2 exhibited excellent catalytic performance for converting CO2 into cyclic carbonates under mild conditions. For propylene oxide (PO) and CO2 synthesis of propylene carbonate (PC), the catalytic system showed a remarkable TOF as high as 29,200 h−1. The catalytic system also showed broad substrate scope of epoxide. Additionally, the catalyst could be recycled to maintain the integrity of the structure and remained equal to the level of its catalytic activity even after seven catalytic rounds. Additionally, a possible catalytic mechanism was proposed due to the high catalytic activity which might be owing to the synergism of Lewis acidic metal centers and N group.

scholarly journals An advancement in the synthesis of nano Pd@magnetic amine-Functionalized UiO-66-NH2 catalyst for cyanation and O-arylation reactions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Firouz Matloubi Moghaddam ◽  
Atefeh Jarahiyan ◽  
Mahdi Heidarian Haris ◽  
Ali Pourjavadi
Keyword(s):  
Magnetic Property ◽  
Magnetic Nanoparticles ◽  
Heterogeneous Catalyst ◽  
Catalytic System ◽  
Aryl Halides ◽  
Optimal Conditions ◽  
Efficient Catalyst ◽  
Catalyst Structure ◽  
Mild Conditions ◽  
Amine Functionalized

AbstractThe magnetic MOF-based catalytic system has been reported here to be an efficient catalyst for synthesis of benzonitriles and diarylethers of aryl halides under optimal conditions. The MOF catalyst was built based on magnetic nanoparticles and UiO-66-NH2 which further modified with 2,4,6-trichloro-1,3,5-triazine and 5-phenyl tetrazole at the same time and the catalyst structure was confirmed by various techniques. This new modification has been applied to increase anchoring palladium into the support. Furthermore, the products’ yields were obtained in good to excellent for all reactions under mild conditions which result from superior activity of the synthesized heterogeneous catalyst containing palladium. Also, the magnetic property of the MOF-based catalyst makes it easy to separate from reaction mediums and reuse in the next runs.

Ferrocene functionalized graphene: preparation, characterization and efficient catalyst for thermal decomposition of TKX-50

2021 ◽  
Author(s):  
Ming Zhang ◽  
Fengqi Zhao ◽  
Hui Li ◽  
Shuai Dong ◽  
Yanjing Yang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Molecular Structures ◽  
Functionalized Graphene ◽  
Efficient Catalyst ◽  
Two Dimension

Novel ferrocene functionalized graphene with different molecular structures were designed, fabricated and characterized using SEM, EDS, FTIR, XPS and RAMAN methods. SEM results show the two-dimension structure of the prepared...

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