Catalytic H2 auto transfer amination of polyols to alkyl amines in one pot using supported Ru catalysts

2018 ◽  
Vol 302 ◽  
pp. 227-232 ◽  
Author(s):  
Feng Du ◽  
Xin Jin ◽  
Wenjuan Yan ◽  
Meng Zhao ◽  
Prem S. Thapa ◽  
...  
Keyword(s):  
One Pot ◽  
Ru Catalysts ◽  
Alkyl Amines

scholarly journals Nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts enabled by NN2 pincer ligand

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xingjie Zhang ◽  
Di Qi ◽  
Chenchen Jiao ◽  
Xiaopan Liu ◽  
Guisheng Zhang
Keyword(s):  
Functional Group ◽  
High Efficiency ◽  
Materials Science ◽  
Alkylating Agents ◽  
Sonogashira Coupling ◽  
Pincer Ligand ◽  
One Pot ◽  
Mild Conditions ◽  
Alkyl Amines ◽  
Sonogashira Reactions

AbstractAlkynes are amongst the most valuable functional groups in organic chemistry and widely used in chemical biology, pharmacy, and materials science. However, the preparation of alkyl-substituted alkynes still remains elusive. Here, we show a nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts. Key to the success of this coupling is the development of an easily accessible and bench-stable amide-type pincer ligand. This ligand allows naturally abundant alkyl amines as alkylating agents in Sonogashira reactions, and produces diverse alkynes in excellent yields under mild conditions. Salient merits of this chemistry include broad substrate scope and functional group tolerance, gram-scale synthesis, one-pot transformation, versatile late-stage derivatizations as well as the use of inexpensive pre-catalyst and readily available substrates. The high efficiency and strong practicability bode well for the widespread applications of this strategy in constructing functional molecules, materials, and fine chemicals.

scholarly journals Kinetics of Fischer–Tropsch Synthesis in a 3-D Printed Stainless Steel Microreactor Using Different Mesoporous Silica Supported Co-Ru Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 872 ◽  
Author(s):  
Mohammad ◽  
Bepari ◽  
Aravamudhan ◽  
Kuila
Keyword(s):  
Stainless Steel ◽  
Mesoporous Silica ◽  
Photoelectron Spectroscopy ◽  
Space Velocity ◽  
Fischer Tropsch ◽  
One Pot ◽  
Ru Catalysts ◽  
Weight Hourly Space Velocity ◽  
Ft Synthesis ◽  
Mcm 41

Fischer–Tropsch (FT) synthesis was carried out in a 3D printed stainless steel (SS) microchannel microreactor using bimetallic Co-Ru catalysts on three different mesoporous silica supports. CoRu-MCM-41, CoRu-SBA-15, and CoRu-KIT-6 were synthesized using a one-pot hydrothermal method and characterized by Brunner–Emmett–Teller (BET), temperature programmed reduction (TPR), SEM-EDX, TEM, and X-ray photoelectron spectroscopy (XPS) techniques. The mesoporous catalysts show the long-range ordered structure as supported by BET and low-angle XRD studies. The TPR profiles of metal oxides with H2 varied significantly depending on the support. These catalysts were coated inside the microchannels using polyvinyl alcohol and kinetic performance was evaluated at three different temperatures, in the low-temperature FT regime (210–270 °C), at different Weight Hourly Space Velocity (WHSV) in the range of 3.15–25.2 kgcat.h/kmol using a syngas ratio of H2/CO = 2. The mesoporous supports have a significant effect on the FT kinetics and stability of the catalyst. The kinetic models (FT-3, FT-6), based on the Langmuir–Hinshelwood mechanism, were found to be statistically and physically relevant for FT synthesis using CoRu-MCM-41 and CoRu-KIT-6. The kinetic model equation (FT-2), derived using Eley–Rideal mechanism, is found to be relevant for CoRu-SBA-15 in the SS microchannel microreactor. CoRu-KIT-6 was found to be 2.5 times more active than Co-Ru-MCM-41 and slightly more active than CoRu-SBA-15, based on activation energy calculations. CoRu-KIT-6 was ~3 and ~1.5 times more stable than CoRu-SBA-15 and CoRu-MCM-41, respectively, based on CO conversion in the deactivation studies.

Catalytic transformation of glycerol to 1-propanol by combining zirconium phosphate and supported Ru catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29769-29778 ◽  
Author(s):  
Mengpan Wang ◽  
Hanmin Yang ◽  
Yinzheng Xie ◽  
Xiaohui Wu ◽  
Chen Chen ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Zirconium Phosphate ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Catalytic Transformation ◽  
One Pot ◽  
Ru Catalysts ◽  
The One

The one-pot hydrogenolysis of biomass-derived glycerol to 1-propanol has been investigated over sequential two-layer catalysts in a continuous-flow fixed-bed reactor.

Water-assisted one-pot synthesis of N-doped carbon supported Ru catalysts for heterogeneous catalysis

2020 ◽  
Vol 56 (76) ◽  
pp. 11311-11314
Author(s):  
Yueling Cao ◽  
Hepeng Zhang ◽  
Kangkai Liu ◽  
Kai-Jie Chen
Keyword(s):  
Heterogeneous Catalysis ◽  
One Pot ◽  
Ru Catalysts ◽  
One Pot Synthesis ◽  
First Time

A water-assisted one-pot pyrolysis (WAOP) method was developed to fabricate N-doped carbon supported Ru catalysts for quinoline hydrogenation for the first time.

scholarly journals Nickel-Catalyzed Deaminative Sonogashira Coupling of Alkylpyridinium Salts Enabled by a New NN2 Pincer Ligand

2020 ◽  
Author(s):  
Xingjie Zhang ◽  
Di Qi ◽  
Chenchen Jiao ◽  
Xiaopan Liu ◽  
Guisheng Zhang
Keyword(s):  
High Efficiency ◽  
Materials Science ◽  
Alkylating Agents ◽  
Sonogashira Coupling ◽  
Terminal Alkynes ◽  
Pincer Ligand ◽  
One Pot ◽  
Alkyl Amines ◽  
Sonogashira Reactions ◽  
First Time

Abstract Alkynes are amongst the most valuable functional groups in organic chemistry and widely used in chemical biology, pharmacy, and materials science. However, the preparation of alkyl-substituted alkynes still remains elusive. Herein, a novel transformation is disclosed that enables the coupling of terminal alkynes with alkylpyridinium salts under Ni-catalysis. Key to the success of this coupling was the development of a new and readily accessible amide-type pincer ligand. This ligand allows naturally abundant alkyl amines as alkylating agents in Sonogashira reactions for the first time, and leads to diverse alkynes in excellent yields under mild conditions. Salient merits of this chemistry include broad substrates scope and functional group tolerance, gram-scale synthesis, one-pot transformation, versatile late-stage derivatizations as well as the use of inexpensive pre-catalyst and readily available substrates. The high efficiency and strong practicability bode well for the widespread applications of this strategy in constructing functional molecules, materials, and fine chemicals.

A Simple, One-Pot Transformation oft-Alkyl Chlorides Into (t-Alkyl)amines

Synthesis ◽  
1987 ◽  
Vol 1987 (05) ◽  
pp. 487-489 ◽  
Author(s):  
Anna Koziara ◽  
Krystyna Osowska-Pacewicka ◽  
Stefan Zawadzki ◽  
Andrzej Zwierzak
Keyword(s):  
One Pot ◽  
Alkyl Amines

scholarly journals Carbon-Black-Supported Ru Catalysts for the Valorization of Cellulose through Hydrolytic Hydrogenation

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 572 ◽  
Author(s):  
Maria Adsuar-García ◽  
Jhony Flores-Lasluisa ◽  
Fatima Azar ◽  
M. Román-Martínez
Keyword(s):  
Carbon Black ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Renewable Resource ◽  
Residual Chlorine ◽  
Catalyst Characterization ◽  
Supported Metal Catalysts ◽  
One Pot ◽  
Ru Catalysts ◽  
Hydrolytic Hydrogenation

The one-pot hydrolytic hydrogenation of cellulose (HHC) with heterogeneous catalysts is an interesting method for the synthesis of fuels and chemicals from a renewable resource like lignocellulosic biomass. Supported metal catalysts are interesting for this application because they can contain the required active sites for the two catalytic steps of the HHC reaction (hydrolysis and hydrogenation). In this work, Ru catalysts have been prepared using a commercial carbon black that has been modified by sulfonation and oxidation treatments with H2SO4 and (NH4)S2O8, respectively, in order to create acidic surface sites. The correlation between the catalysts’ properties and catalytic activity has been addressed after detailed catalyst characterization. The prepared catalysts are active for cellulose conversion, being that prepared with the carbon black treated with sulfuric acid the most selective to sorbitol (above 40%). This good behavior can be mainly explained by the suitable porous structure and surface chemistry of the carbon support together with the low content of residual chlorine.

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