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Siwayanan P, Chin LZ, Parthiban A, Ayodele OB, Hong BZ. A Safe One-Pot Synthesis and Characterization of Epoxidized Moringa Oleifera Oil. J Oleo Sci 2024; 73:479-487. [PMID: 38556282 DOI: 10.5650/jos.ess23121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024] Open
Abstract
Global demand for epoxidized vegetable oil has been steadily growing. Epoxidized vegetable oils are typically produced using a two-pot synthesis process in which the oxidation and epoxidation reactions are carried out sequentially. This two-pot synthesis method, however, has a major drawback in industrialscale production, particularly when it comes to operational and process safety issues. A laboratory-scale one-pot synthesis method was attempted in this study with the aim to safely synthesize epoxidized Moringa Oleifera oil (eMOo) by avoiding the occurrence of undesired exothermic runaway reaction. The oil extracted from Moringa Oleifera oil seed kernel (MOo) was used as a starting component due to its high degree of unsaturation and also because the Moringa Oleifera plant can be freely grown in any soil conditions. Two parallel oxidation and epoxidation reactions were carried out simultaneously in this one-pot synthesis method to produce eMOo. The effect of five different mole ratios of MOo, acetic acid and hydrogen peroxide (1:1:1, 1:1:2, 1:1.5:2, 1:1.75:2 and 1:2:2, respectively) on reaction mechanism was investigated at the controlled temperature range of 43 - 55°C and reaction time of 0 - 120 min. The physicochemical properties of MOo as well as the oxirane oxygen content (OOC) of the resulting eMOo were characterized. In addition, GC-MS and FTIR analysis were performed to verify the molecular composition of MOo and also to identify the epoxy group of the resulting eMOo respectively. Among the five different mole ratios studied, the 1:1.5:2 mole ratio has the highest unsaturation conversion of 79.57% and OOC of 4.12%.
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Affiliation(s)
- Parthiban Siwayanan
- School of Energy and Chemical Engineering, Xiamen University Malaysia
- College of Chemistry and Chemical Engineering, Xiamen University
| | - Lui Zi Chin
- School of Energy and Chemical Engineering, Xiamen University Malaysia
| | | | | | - Ban Zhen Hong
- School of Energy and Chemical Engineering, Xiamen University Malaysia
- College of Chemistry and Chemical Engineering, Xiamen University
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2
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Kargupta W, Raj Kafle S, Lee Y, Kim BS. One-pot treatment of Saccharophagus degradans for polyhydroxyalkanoate production from brown seaweed. Bioresour Technol 2023:129392. [PMID: 37364651 DOI: 10.1016/j.biortech.2023.129392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/23/2023] [Accepted: 06/23/2023] [Indexed: 06/28/2023]
Abstract
The conventional production of polyhydroxyalkanoate (PHA) from waste biomass requires a pretreatment step (acid or alkali) for reducing sugar extraction, followed by bacterial fermentation. This study aims to find a greener approach for PHA production from brown seaweed. Saccharophagus degradans can be a promising bacterium for simultaneous reducing sugar and PHA production, bypassing the need for a pretreatment step. Cell retention cultures of S. degradans in membrane bioreactor resulted in approximately 4- and 3-fold higher PHA concentrations than batch cultures using glucose and seaweed as carbon sources, respectively. X-ray diffraction, Fourier transform infrared spectroscopy, and nuclear magnetic resonance results revealed identical peaks for the resulting PHA and standard poly(3-hydroxybutyrate). The developed one step process using cell retention culture of S. degradans could be a beneficial process for scalable and sustainable PHA production.
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Affiliation(s)
- Wriju Kargupta
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Saroj Raj Kafle
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Youngmoon Lee
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Beom Soo Kim
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea.
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3
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Colussi F, Rodríguez H, Michelin M, Teixeira JA. Challenges in Using Ionic Liquids for Cellulosic Ethanol Production. Molecules 2023; 28:molecules28041620. [PMID: 36838608 PMCID: PMC9961591 DOI: 10.3390/molecules28041620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/21/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
The growing need to expand the use of renewable energy sources in a sustainable manner, providing greater energy supply security and reducing the environmental impacts associated with fossil fuels, finds in the agricultural by-product bioethanol an economically viable alternative with significant expansion potential. In this regard, a dramatic boost in the efficiency of processes already in place is required, reducing costs, industrial waste, and our carbon footprint. Biofuels are one of the most promising alternatives to massively produce energy sustainably in a short-term period. Lignocellulosic biomass (LCB) is highly recalcitrant, and an effective pretreatment strategy should also minimize carbohydrate degradation by diminishing enzyme inhibitors and other products that are toxic to fermenting microorganisms. Ionic liquids (ILs) have been playing an important role in achieving cleaner processes as a result of their excellent physicochemical properties and outstanding performance in the dissolution and fractionation of lignocellulose. This review provides an analysis of recent advances in the production process of biofuels from LCB using ILs as pretreatment and highlighting techniques for optimizing and reducing process costs that should help to develop robust LCB conversion processes.
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Affiliation(s)
- Francieli Colussi
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
- Correspondence: ; Tel.: +351-253-604-426
| | - Héctor Rodríguez
- CRETUS, Department of Chemical Engineering, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Michele Michelin
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - José A. Teixeira
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
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Sun W, Shen X, Liu J, Wu Z, Chen H. Preparing Well-Defined Polyacrylamide-b-Polycarbonate by Integrating Photoiniferter Polymerization and TBD-Catalyzed ROP. Macromol Rapid Commun 2022; 43:e2200376. [PMID: 35726483 DOI: 10.1002/marc.202200376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/09/2022] [Indexed: 11/07/2022]
Abstract
The dual-initiator technique allows the polymerization of different monomers from orthogonal polymerization mechanisms to obtain block copolymers (BCPs). In this study, it is attempted to combine photoiniferter living free radical polymerization and organocatalytic ring-opening polymerization (ROP) to design a hydroxyl-functionalized carbamodithioate, i.e., 4-(hydroxymethyl)benzyl diethylcarbamodithioate (HBDC), which can integrate photoiniferter polymerization of acrylamide monomers and ROP of cyclic carbonates. As a proof of concept, the monomer applicability is further extended to acrylates and lactones. The results confirm that the two polymerization systems are experimentally compatible in a stepwise sequence as well as in a simultaneous one-pot process to synthesize BCPs. It is reasonable to assume that HBDC can allow for simple and efficient one-pot access to well-defined BCPs from a larger range of monomers, which is more advantageous from the operational, economical, and environmental points of view.
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Affiliation(s)
- Wei Sun
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Xiang Shen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Jingrui Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Zhaoqiang Wu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Hong Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
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Sriariyanun M, Kitiborwornkul N, Tantayotai P, Rattanaporn K, Show PL. One-Pot Ionic Liquid-Mediated Bioprocess for Pretreatment and Enzymatic Hydrolysis of Rice Straw with Ionic Liquid-Tolerance Bacterial Cellulase. Bioengineering (Basel) 2022; 9:bioengineering9010017. [PMID: 35049726 PMCID: PMC8772859 DOI: 10.3390/bioengineering9010017] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 11/22/2022] Open
Abstract
Ionic liquid (IL) pretreatment of lignocellulose is an efficient method for the enhancement of enzymatic saccharification. However, the remaining residues of ILs deactivate cellulase, therefore making intensive biomass washing after pretreatment necessary. This study aimed to develop the one-pot process combining IL pretreatment and enzymatic saccharification by using low-toxic choline acetate ([Ch][OAc]) and IL-tolerant bacterial cellulases. Crude cellulases produced from saline soil inhabited Bacillus sp. CBD2 and Brevibacillus sp. CBD3 were tested under the influence of 0.5–2.0 M [Ch][OAc], which showed that their activities retained at more than 95%. However, [Ch][OAc] had toxicity to CBD2 and CBD3 cultures, in which only 32.85% and 12.88% were alive at 0.5 M [Ch][OAc]. Based on the specific enzyme activities, the sugar amounts produced from one-pot processes using 1 mg of CBD2 and CBD3 were higher than that of Celluclast 1.5 L by 2.0 and 4.5 times, respectively, suggesting their potential for further application in the biorefining process of value-added products.
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Affiliation(s)
- Malinee Sriariyanun
- Biorefinery and Process Automation Engineering Center, Department of Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand;
- Correspondence:
| | - Nichaphat Kitiborwornkul
- Biorefinery and Process Automation Engineering Center, Department of Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand;
| | - Prapakorn Tantayotai
- Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand;
| | - Kittipong Rattanaporn
- Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand;
| | - Pau-Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia, Semenyih 43500, Selangor, Malaysia;
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Ganta RK, Kerru N, Maddila S, Jonnalagadda SB. Advances in Pyranopyrazole Scaffolds' Syntheses Using Sustainable Catalysts-A Review. Molecules 2021; 26:3270. [PMID: 34071629 PMCID: PMC8199150 DOI: 10.3390/molecules26113270] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/23/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022] Open
Abstract
Heterogeneous catalysis plays a crucial role in many chemical processes, including advanced organic preparations and the design and synthesis of new organic moieties. Efficient and sustainable catalysts are vital to ecological and fiscal viability. This is why green multicomponent reaction (MCR) approaches have gained prominence. Owing to a broad range of pharmacological applications, pyranopyrazole syntheses (through the one-pot strategy, employing sustainable heterogeneous catalysts) have received immense attention. This review aimed to emphasise recent developments in synthesising nitrogen-based fused heterocyclic ring frameworks, exploring diverse recyclable catalysts. The article focused on the synthetic protocols used between 2010 and 2020 using different single, bi- and tri-metallic materials and nanocomposites as reusable catalysts. This review designated the catalysts' efficacy and activity in product yields, reaction time, and reusability. The MCR green methodologies (in conjunction with recyclable catalyst materials) proved eco-friendly and ideal, with a broad scope that could feasibly lead to advancements in organic synthesis.
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Affiliation(s)
- Ravi Kumar Ganta
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam 530045, India; (R.K.G.); (S.M.)
| | - Nagaraju Kerru
- Department of Chemistry, GITAM School of Science, Bengaluru Campus, GITAM University, Karnataka 561203, India;
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam 530045, India; (R.K.G.); (S.M.)
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
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Delavault A, Ochs K, Gorte O, Syldatk C, Durand E, Ochsenreither K. Microwave-Assisted One-Pot Lipid Extraction and Glycolipid Production from Oleaginous Yeast Saitozyma podzolica in Sugar Alcohol-Based Media. Molecules 2021; 26:molecules26020470. [PMID: 33477445 PMCID: PMC7829979 DOI: 10.3390/molecules26020470] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/13/2021] [Accepted: 01/15/2021] [Indexed: 12/24/2022] Open
Abstract
Glycolipids are non-ionic surfactants occurring in numerous products of daily life. Due to their surface-activity, emulsifying properties, and foaming abilities, they can be applied in food, cosmetics, and pharmaceuticals. Enzymatic synthesis of glycolipids based on carbohydrates and free fatty acids or esters is often catalyzed using certain acyltransferases in reaction media of low water activity, e.g., organic solvents or notably Deep Eutectic Systems (DESs). Existing reports describing integrated processes for glycolipid production from renewables use many reaction steps, therefore this study aims at simplifying the procedure. By using microwave dielectric heating, DESs preparation was first accelerated considerably. A comparative study revealed a preparation time on average 16-fold faster than the conventional heating method in an incubator. Furthermore, lipids from robust oleaginous yeast biomass were successfully extracted up to 70% without using the pre-treatment method for cell disruption, limiting logically the energy input necessary for such process. Acidified DESs consisting of either xylitol or sorbitol and choline chloride mediated the one-pot process, allowing subsequent conversion of the lipids into mono-acylated palmitate, oleate, linoleate, and stearate sugar alcohol esters. Thus, we show strong evidence that addition of immobilized Candida antarctica Lipase B (Novozym 435®), in acidified DES mixture, enables a simplified and fast glycolipid synthesis using directly oleaginous yeast biomass.
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Affiliation(s)
- André Delavault
- Technical Biology, Institute of Process Engineering in Life Sciences II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (K.O.); (O.G.); (C.S.); (K.O.)
- Correspondence: ; Tel.: +49-721-60846739
| | - Katarina Ochs
- Technical Biology, Institute of Process Engineering in Life Sciences II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (K.O.); (O.G.); (C.S.); (K.O.)
| | - Olga Gorte
- Technical Biology, Institute of Process Engineering in Life Sciences II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (K.O.); (O.G.); (C.S.); (K.O.)
| | - Christoph Syldatk
- Technical Biology, Institute of Process Engineering in Life Sciences II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (K.O.); (O.G.); (C.S.); (K.O.)
| | - Erwann Durand
- CIRAD, UMR QualiSud, F-34398 Montpellier, France;
- QualiSud, Univ Montpellier, CIRAD, Institut Agro, Univ Avignon, Univ Réunion, 34000 Montpellier, France
| | - Katrin Ochsenreither
- Technical Biology, Institute of Process Engineering in Life Sciences II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (K.O.); (O.G.); (C.S.); (K.O.)
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8
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Luo W, Chen Y, Liu J, Yang Y, Wang F, Zhou Z. Novel Green Method for the Synthesis of Monoacetin over Bifunctional Cu-Cr Phosphates under the CO 2 Atmosphere. ACS Appl Mater Interfaces 2021; 13:341-349. [PMID: 33369437 DOI: 10.1021/acsami.0c15776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Monoacetin was synthesized using a novel green method in which acetonitrile was hydrolyzed and then esterified with glycerol over Cu-Cr phosphates under the CO2 atmosphere. Monoacetin was synthesized with high yield (87.6% glycerol conversion and 86.3% monoacetin selectivity) through this one-pot cascade method. In this process, acetonitrile can react with water to form acetamide and further undergo esterification with glycerol. There are two main reasons for obtaining monoacetin in high yield: (1) the interaction of CO2 with high-temperature liquid water enhances the acid strength of the reaction system and then promotes the activation of acetonitrile; and (2) the introduction of Cr species causes a synergistic effect between Cu and Cr species to adjust the acidity and basicity of the catalyst. The introduction of Cr species converts eight-coordinated Cu2+ into four-coordinated Cu2+ to improve the acidity of the catalyst. The introduction of Cr species also causes the surface oxygen to be transformed into lattice oxygen to enhance the basicity of the catalyst. These bimetallic phosphate materials may provide a new pathway for the application of acid-base bifunctional catalytic reactions.
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Affiliation(s)
- Wei Luo
- College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yanqiu Chen
- College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Junhua Liu
- College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yue Yang
- College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Fang Wang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Zhou Zhou
- College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
- Changzhou Institute of Innovation and Development, Nanjing Normal University, Changzhou 213022, China
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9
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Fang H, Wei Y, Li Y, Zhou G. One-Pot Process for the Production of Ginsenoside Rd by Coupling Enzyme-Assisted Extraction with Selective Enzymolysis. Biol Pharm Bull 2020; 43:1443-1447. [PMID: 32999154 DOI: 10.1248/bpb.b19-01127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
One-pot process for the production of ginsenoside Rd by coupling enzyme-assisted extraction with selective enzymolysis was explored in this paper. Several detection methods including HPLC-MS were used to identify and quantify the products in the enzymolysis solution of pectinase. Results showed that ginsenoside Rd was the main component in enzymolysis solution, pectinase specifically hydrolyzes protopanaxadiol (PPD)-type ginsenoside and was a selective enzyme to convert ginsenoside Rb1 to Rd in a way. In addition the influencing factors on the yield of ginsenoside Rb1 and Rd were optimized using L9(34) orthogonal design data. The enzymolysis conditions for the higher yield of Rd were 52.5 °C, pH 6 and 1 h with a yield of 0.8314 from 50 mg drug material. The controllable transformation hypothesis of the PPD-type ginsenoside was also explored from the perspective of the molecular steric hindrance. Pectinase could be used as an efficient enzyme for one-pot producing ginsenoside Rd.
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Affiliation(s)
- Haiyan Fang
- School of Biological Engineering, School of Chemical and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences)
| | - Yingqin Wei
- School of Biological Engineering, School of Chemical and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences)
| | - Yaqi Li
- School of Biological Engineering, School of Chemical and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences)
| | - Guowei Zhou
- School of Biological Engineering, School of Chemical and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences)
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Abstract
In recent years, there has been a rapid and sustained increase in the development and use of one-pot chemoenzymatic reaction processes for the efficient synthesis of high-value molecules. This strategy can provide a number of advantages over traditional synthetic methods, including high levels of selectivity in reactions, mild and sustainable reaction conditions, and the ability to rapidly build molecular complexity in a single reaction vessel. Here, we present several examples of chemoenzymatic one-pot reaction sequences that demonstrate the diversity of transformations that can be incorporated in these processes.
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Affiliation(s)
- Tyler J. Doyon
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, USA
- Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Alison R. H. Narayan
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, USA
- Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, USA
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
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11
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Ghoshal A, Yugandhar D, Nanubolu JB, Srivastava AK. An Efficient One-Pot Synthesis of Densely Functionalized Fused-Quinolines via Sequential Ugi4CC and Acid-Mediated Povarov-Type Reaction. ACS Comb Sci 2017; 19:600-608. [PMID: 28741925 DOI: 10.1021/acscombsci.7b00095] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A divergent synthesis of fused-quinolines has been explored by performing Ugi four-component condensation and sulfuric acid promoted deprotection/Povarov-type reaction in one-pot. The process involves Ugi condensation of propiolic acids, aldehydes/ketones, aminoaldehyde acetals and isocyanides followed by sulfuric acid promoted deprotection and Povarov-type reaction with anilines in ethanol. This method enables straightforward access to the structurally diverse 2,3-dihydro-1H-pyrrolo[3,4-b]quinolin-1-ones (DHPQ), 3,4-dihydrobenzo[b][1,6]naphthyridin-1(2H)-ones (DHBN), and 2,3,4,5-tetrahydro-1H-azepino[4,3-b]quinolin-1-ones (THAQ), starting from readily available starting materials.
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Affiliation(s)
- Anirban Ghoshal
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
| | - Doddapaneni Yugandhar
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
| | - Jagadeesh Babu Nanubolu
- Centre
for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
| | - Ajay Kumar Srivastava
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
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12
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Alderson JM, Schomaker JM. Tandem Oxidative Derivatization of Nitrene Insertion Products for the Highly Diastereoselective Synthesis of 1,3-aminoalcohols. Chemistry 2017; 23:8571-8576. [PMID: 28486762 DOI: 10.1002/chem.201702038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Indexed: 11/06/2022]
Abstract
Transition-metal-catalyzed nitrene insertion into tertiary C-H bonds located at stereogenic carbons often results in mixtures of diastereomeric products, especially if the reaction proceeds through a concerted pathway. In this communication, we report a solution to this problem that invokes a one-pot, silver-catalyzed C-H nitrene transfer reaction. Nitrene insertion is followed by facile oxidation of the amine to an imine and nucleophilic addition to furnish α-tertiary amine 1,3-aminoalcohol products in high diastereoselectivities. The silver catalyst, PhIO oxidant, and TEMPO additive are crucial to success in this unusual oxidation, which is proposed to occur via hydrogen-atom abstraction from pre-activation of the initial nitrene insertion product by additional oxidant.
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Affiliation(s)
- Juliet M Alderson
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
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13
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Shi Q, Zhu C, Fu S, Du D, Lin Y. One-Pot Fabrication of Mesoporous Core-Shell Au@PtNi Ternary Metallic Nanoparticles and Their Enhanced Efficiency for Oxygen Reduction Reaction. ACS Appl Mater Interfaces 2016; 8:4739-4744. [PMID: 26820165 DOI: 10.1021/acsami.5b12407] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Currently, Pt-based nanomaterials with tailorable shapes, structures, and morphologies are the most popular electrocatalysts for oxygen reduction reaction, which is a significant cathode reaction in fuel cells for renewable energy applications. We have successfully synthesized mesoporous core-shell Au@PtNi ternary metallic nanoparticles through a one-pot reduction method for cathodic materials used as oxygen reduction reaction catalysts. The as-synthesized nanoparticles exhibited superior catalytic activities and long-term stabilities compared with mesoporous core-shell Au@Pt nanoparticles and commercial Pt/C. The unique mesoporous core-shell structures as well as the alloy shells enable the enhanced electrochemical oxygen reduction reaction performances of the Pt-based materials via the electronic effect and geometric effect, holding great promise in fuel cell application.
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Affiliation(s)
- Qiurong Shi
- School of Mechanical and Material Engineering, Washington State University , Pullman, Washington 99164, United States
| | - Chengzhou Zhu
- School of Mechanical and Material Engineering, Washington State University , Pullman, Washington 99164, United States
| | - Shaofang Fu
- School of Mechanical and Material Engineering, Washington State University , Pullman, Washington 99164, United States
| | - Dan Du
- School of Mechanical and Material Engineering, Washington State University , Pullman, Washington 99164, United States
| | - Yuehe Lin
- School of Mechanical and Material Engineering, Washington State University , Pullman, Washington 99164, United States
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Zhang H, Liu RQ, Liu KC, Li QB, Li QY, Liu SZ. A one-pot approach to pyridyl isothiocyanates from amines. Molecules 2014; 19:13631-42. [PMID: 25185069 PMCID: PMC6271198 DOI: 10.3390/molecules190913631] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 11/16/2022] Open
Abstract
A one-pot preparation of pyridyl isothiocyanates (ITCs) from their corresponding amines has been developed. This method involves aqueous iron(III) chloride-mediated desulfurization of a dithiocarbamate salt that is generated in situ by treatment of an amine with carbon disulfide in the present of DABCO or sodium hydride. The choice of base is of decisive importance for the formation of the dithiocarbamate salts. This one-pot process works well for a wide range of pyridyl ITCs. Utilizing this protocol, some highly electron-deficient pyridyl and aryl ITCs are obtained in moderate to good yields.
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Affiliation(s)
- Hao Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Rui-Quan Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Ke-Chang Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Qi-Bo Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Qing-Yang Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Shang-Zhong Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
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15
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Sun N, Li B, Shao J, Mo W, Hu B, Shen Z, Hu X. A general and facile one-pot process of isothiocyanates from amines under aqueous conditions. Beilstein J Org Chem 2012; 8:61-70. [PMID: 22423272 PMCID: PMC3302099 DOI: 10.3762/bjoc.8.6] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 12/18/2011] [Indexed: 01/09/2023] Open
Abstract
A general and facile one-pot protocol for the preparation of a broad range of alkyl and aryl isothiocyanates has been developed from their corresponding primary amines under aqueous conditions. This synthetic process involves an in situ generation of a dithiocarbamate salt from the amine substrate by reacting with CS(2) followed by elimination to form the isothiocyanate product with cyanuric acid as the desulfurylation reagent. The choice of solvent is of decisive importance for the successful formation of the dithiocarbamate salt particularly for highly electron-deficient substrates. This novel and economical method is suitable for scale-up activities.
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Affiliation(s)
- Nan Sun
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Bin Li
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jianping Shao
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Weimin Mo
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Baoxiang Hu
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhenlu Shen
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xinquan Hu
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Sow B, Bellavance G, Barabé F, Barriault L. One-pot Diels-Alder cycloaddition/gold(I)-catalyzed 6-endo-dig cyclization for the synthesis of the complex bicyclo[3.3.1]alkenone framework. Beilstein J Org Chem 2011; 7:1007-13. [PMID: 21915201 PMCID: PMC3167837 DOI: 10.3762/bjoc.7.114] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 06/30/2011] [Indexed: 11/23/2022] Open
Abstract
The rapid synthesis of bicyclo[m.n.1]alkanone cores possessing quaternary carbon centers adjacent to a bridged ketone represents a significant synthetic challenge. This type of architectural feature is embedded in various complex biologically active compounds such as hyperforin and garsubellin A. Herein, we report a highly diastereoselective one-pot Diels-Alder reaction/Au(I)-catalyzed carbocyclization to generate bicyclo[3.3.1]alkanones in yields ranging from 48-93%.
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Affiliation(s)
- Boubacar Sow
- Department of Chemistry, 10 Marie Curie, University of Ottawa, Ottawa, Canada, K1N 6N5
| | - Gabriel Bellavance
- Department of Chemistry, 10 Marie Curie, University of Ottawa, Ottawa, Canada, K1N 6N5
| | - Francis Barabé
- Department of Chemistry, 10 Marie Curie, University of Ottawa, Ottawa, Canada, K1N 6N5
| | - Louis Barriault
- Department of Chemistry, 10 Marie Curie, University of Ottawa, Ottawa, Canada, K1N 6N5
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