scholarly journals Acid and base catalysed reactions in one pot with site-isolated polyHIPE catalysts

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8175-8183 ◽  
Author(s):  
Erdem Yavuz ◽  
Nikolay Cherkasov ◽  
Volkan Degirmenci
Keyword(s):  
Tertiary Amine ◽  
Heterogeneous Catalysts ◽  
Porous Polymers ◽  
Carboxyl Groups ◽  
One Pot ◽  
Acid And Base ◽  
Highly Porous

The highly porous polymers with interconnected windows (polyHIPE) are functionalised with tertiary amine and carboxyl groups to form basic and Brønsted acidic heterogeneous catalysts.

Acid and base coexisted heterogeneous catalysts supported on hypercrosslinked polymers for one-pot cascade reactions

2017 ◽  
Vol 348 ◽  
pp. 168-176 ◽  
Author(s):  
Kewei Wang ◽  
Zhifang Jia ◽  
Xuekang Yang ◽  
Ling Wang ◽  
Yanlong Gu ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Cascade Reactions ◽  
One Pot ◽  
Acid And Base ◽  
Hypercrosslinked Polymers

One-pot fabrication of lignin-based aromatic porous polymers for efficient removal of bisphenol AF from water

2021 ◽  
Vol 175 ◽  
pp. 396-405
Author(s):  
Luyan Sun ◽  
Kungang Chai ◽  
Liqin Zhou ◽  
Dankui Liao ◽  
Hongbing Ji
Keyword(s):  
Porous Polymers ◽  
Efficient Removal ◽  
One Pot ◽  
Bisphenol Af

scholarly journals Facile Synthesis of COF-Supported Reduced Pd-Based Catalyst for One-Pot Reductive Amination of Aldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Jianguo Liu ◽  
Mingyue Zhang ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Secondary Amines ◽  
Metallic State ◽  
One Pot ◽  
Effective Synthesis ◽  
Pharmaceutical Industries ◽  
The One ◽  
Heterocyclic Aldehydes ◽  
Supported Pd

Dibenzylamine motifs are an important class of crucial organic compounds and are widely used in fine chemical and pharmaceutical industries. The development of the efficient, economical, and environmentally friendly synthesis of amines using transition metal-based heterogeneous catalysts remains both desirable and challenging. Herein, we prepared the covalent organic framework (COF)-supported heterogeneous reduced COF-supported Pd-based catalyst and used it for the one-pot reductive amination of aldehydes. There are both Pd metallic state and oxidated Pdσ+ in the catalysts. Furthermore, in the presence of the reduced COF-supported Pd-based catalyst, many aromatic, aliphatic, and heterocyclic aldehydes with various functional groups substituted were converted to their corresponding amines products in good to excellent selectivity (up to 91%) under mild reaction conditions (70 °C, 2 h, NH3, 20 bar H2). This work expands the covalent organic frameworks for the material family and its support catalyst, opening up new catalytic applications in the economical, practical, and effective synthesis of secondary amines.

One-pot synthesis of furfural derivatives from pentoses using solid acid and base catalysts

2014 ◽  
Vol 4 (4) ◽  
pp. 971-978 ◽  
Author(s):  
Mahiro Shirotori ◽  
Shun Nishimura ◽  
Kohki Ebitani
Keyword(s):  
Solid Acid ◽  
Acid Base ◽  
One Pot ◽  
Amberlyst 15 ◽  
Base Catalysts ◽  
One Pot Synthesis ◽  
Combined Use ◽  
Acid And Base

One-pot synthesis of (2-furanylmethylene)malononitrile, a Knoevenagel product of furfural with malononitrile, from xylose efficiently proceeded by combined use of acid Amberlyst-15 and acid-base Cr/hydrotalcites in 44% yield.

One-pot synthesis of naturanol from α-pinene oxide on bifunctional Pt-Sn/SiO2 heterogeneous catalysts

2007 ◽  
Vol 325 (1) ◽  
pp. 15-24 ◽  
Author(s):  
G. Neri ◽  
G. Rizzo ◽  
A.S. Arico’ ◽  
C. Crisafulli ◽  
L. De Luca ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
One Pot ◽  
One Pot Synthesis

scholarly journals Chemocatalytic Production of Lactates from Biomass-Derived Sugars

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Heng Zhang ◽  
Yulin Hu ◽  
Liying Qi ◽  
Jian He ◽  
Hu Li ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Heterogeneous Catalysts ◽  
Catalytic Performance ◽  
Green Solvents ◽  
Separation And Purification ◽  
Sustainable Resources ◽  
Base Catalysts ◽  
Heterogeneous Catalytic ◽  
Acid And Base ◽  
Relative Separation

In recent decades, a great deal of attention has been paid to the exploration of alternative and sustainable resources to produce biofuels and valuable chemicals, with aims of reducing the reliance on depleting confined fossil resources and alleviating serious economic and environmental issues. In line with this, lignocellulosic biomass-derived lactic acid (LA, 2-hydroxypropanoic acid), to be identified as an important biomass-derived commodity chemical, has found wide applications in food, pharmaceuticals, and cosmetics. In spite of the current fermentation of saccharides to produce lactic acid, sustainability issues such as environmental impact and high cost derived from the relative separation and purification process will be growing with the increasing demands of necessary orders. Alternatively, chemocatalytic approaches to manufacture LA from biomass (i.e., inedible cellulose) have attracted extensive attention, which may give rise to higher productivity and lower costs related to product work-up. This work presents a review of the state-of-the-art for the production of LA using homogeneous, heterogeneous acid, and base catalysts, from sugars and real biomass like rice straw, respectively. Furthermore, the corresponding bio-based esters lactate which could serve as green solvents, produced from biomass with chemocatalysis, is also discussed. Advantages of heterogeneous catalytic reaction systems are emphasized. Guidance is suggested to improve the catalytic performance of heterogeneous catalysts for the production of LA.

scholarly journals Production of lactic acid from cellulose using solid catalyst

2019 ◽  
Vol 268 ◽  
pp. 07006 ◽  
Author(s):  
Sujitra Doungsri ◽  
P. Rattanaphanee ◽  
Aatichat Wongkoblap
Keyword(s):  
Lactic Acid ◽  
Batch Reactor ◽  
Nitrogen Pressure ◽  
Reaction Pathways ◽  
Solid Catalyst ◽  
One Pot ◽  
Solid Catalysts ◽  
Platform Chemicals ◽  
Acid And Base ◽  
The One

Lactic acid (LA), one of the important biomass derived platform chemicals, has been used in food and chemical industries, especially in biodegradable polymer as polylactic acid (PLA). The aim of this work is to study the one-pot production of LA from cellulose by using different solid catalysts. The reaction was conducted in a high pressure batch reactor and the catalyst used in this study were ZrO2 and Al2O3. The reaction was carried out at temperature of 200oC for 6 hr. and under nitrogen pressure of 1 MP. It was found that the production yield of LA were 8.02% and 6.63%, when the ZrO2 and Al2O3 catalysts were used respectively. The result indicated that the ZrO2 may effect on the LA production because of the acid and base sites of the ZrO2. Therefore, the reaction pathways for conversion of cellulose into lactic acid have been investigated, and developed the new conditions to achieve the higher yield.

One-pot synthesis of amides from carboxylic acids activated using thionyl chloride

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34468-34475 ◽  
Author(s):  
A. Leggio ◽  
E. L. Belsito ◽  
G. De Luca ◽  
M. L. Di Gioia ◽  
V. Leotta ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Tertiary Amine ◽  
Thionyl Chloride ◽  
One Pot ◽  
One Pot Synthesis ◽  
Tertiary Amides

We report on a one-pot synthesis of secondary and tertiary amides from carboxylic acids and amines in the presence of a tertiary amine by using thionyl chloride.

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