1
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Ghamari Kargar P, Bagherzade G. Advances in the greener synthesis of chromopyrimidine derivatives by a multicomponent tandem oxidation process. Sci Rep 2023; 13:19104. [PMID: 37925547 PMCID: PMC10625593 DOI: 10.1038/s41598-023-46004-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/26/2023] [Indexed: 11/06/2023] Open
Abstract
A hydrophilic cobalt/copper heterogeneous bimetallic catalyst named mTEG-CS-Co/Cu-Schiff-base/IL was successfully synthesized from chitosan polysaccharide. The new catalyst was investigated and confirmed using various techniques including FT-IR, FE-SEM, EDX-EDS, XRD, TEM, TGA, AFM, NMR and ICP. The catalyst exhibited powerful catalyst activity for the tandem one pot oxidative chromopyrimidine reaction from benzyl alcohols under mild conditions, utilizing air as a clean source in a green protocol. The catalyst was compatible with a wide range of benzyl alcohols, and aldehydes formed in situ, and bis-aldehydes synthesized were condensed with urea/4‑hydroxycumarin to provide favorable products in good yields for all derivatives (14 new derivatives). The presence of tri-ethylene glycol and imidazolium moieties with hydrophilic properties on the mTEG-CS-Co/Cu-Schiff-base/IL nanohybrid provides dispersion of the nanohybrid particles in water, leading to higher catalytic performance. Furthermore, the reaction exhibited several other notable features, including low catalyst loading, the ability to be recycled for up to 6 stages, high atom economy, a simple work procedure, short reaction time, utilization of an environmentally friendly nanohybrid, and the replacement of volatile and organic solvents with water solvent.
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Affiliation(s)
- Pouya Ghamari Kargar
- Department of Chemistry, Faculty of Sciences, University of Birjand, Birjand, 97175-615, Iran
| | - Ghodsieh Bagherzade
- Department of Chemistry, Faculty of Sciences, University of Birjand, Birjand, 97175-615, Iran.
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2
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Zhang ZW, Liu SW, Huang HP, Xie YH, Huang RC, Deng YQ, Lin N. Dehydroabietane-type bifunctional organocatalysts in asymmetric synthesis: recent progress. RSC Adv 2023; 13:31047-31058. [PMID: 37881754 PMCID: PMC10594059 DOI: 10.1039/d3ra06715g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 10/19/2023] [Indexed: 10/27/2023] Open
Abstract
Dehydroabietane-type bifunctional organocatalysts derived from rosane-type diterpenes of dehydroabietic acid (DHAA) and dehydroabietylamine (DA) have been utilized in a wide variety of highly enantioselective reactions. Since one well-documented review exclusively reported on the development of terpene-derived bifunctional thioureas in asymmetric organocatalysis in 2013, fragmentary progress on the dehydroabietane-type bifunctional thioureas and squaramides has been mentioned in other reviews. In this mini-review, we systematically analyze and reorganize the published literature on dehydroabietane-type bifunctional organocatalysts in the recent decade according to the type of catalysts. Our aim is for this review to provide helpful research information and serve as a foundation for further design and application of rosin-based organocatalysts.
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Affiliation(s)
- Zhen-Wei Zhang
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
- Key Laboratory of TCM Extraction and Purification and Quality Analysis (Guangxi University of Chinese Medicine), Education Department of Guangxi Zhuang Autonomous Region Nanning 530200 China
| | - Shao-Wu Liu
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
| | - Hong-Ping Huang
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
| | - Yu-Hang Xie
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
| | - Ruo-Chen Huang
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
| | - Yan-Qiu Deng
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
- Key Laboratory of TCM Extraction and Purification and Quality Analysis (Guangxi University of Chinese Medicine), Education Department of Guangxi Zhuang Autonomous Region Nanning 530200 China
| | - Ning Lin
- College of Pharmacy, Guangxi University of Chinese Medicine, Guangxi Zhuang Yao Medicine Center of Engineering and Technology Nanning 530200 China
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3
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Chakraborty N, Mitra AK. The versatility of DABCO as a reagent in organic synthesis: a review. Org Biomol Chem 2023; 21:6830-6880. [PMID: 37605948 DOI: 10.1039/d3ob00921a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
DABCO (1,4-diazabicyclo[2.2.2]octane) has garnered a lot of interest for numerous organic transformations since it is a low-cost, environmentally friendly, reactive, manageable, non-toxic and basic organocatalyst with a high degree of selectivity. Moreover, DABCO functions as a nucleophile as well as a base in a variety of processes for the synthesis of a wide array of molecules, including carbocyclic and heterocyclic compounds. Protection and deprotection of functional groups and the formation of carbon-carbon bonds are also catalyzed by DABCO. The reagent also finds applications in the synthesis of functional groups like isothiocyanate, amide and ester. Application of DABCO in cycloaddition, coupling, aromatic nucleophilic substitution, ring-opening, oxidation and rearrangement reactions is also noteworthy. This is a state of the art review that has encompassed a variety of processes for the synthesis of organic frameworks using DABCO.
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Affiliation(s)
- Nitisha Chakraborty
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand, Pin: 826004, India
| | - Amrit Krishna Mitra
- Department of Chemistry, Government General Degree College, Singur, Singur, Hooghly, West Bengal, Pin: 712409, India.
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4
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Losito O, Casiello M, Fusco C, Mateos Cuadrado H, Monopoli A, Nacci A, D’Accolti L. Eco-Friendly Catalytic Synthesis of Top Value Chemicals from Valorization of Cellulose Waste. Polymers (Basel) 2023; 15:polym15061501. [PMID: 36987281 PMCID: PMC10053711 DOI: 10.3390/polym15061501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/09/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
The total amount of cellulose from paper, wood, food, and other human activity waste produced in the EU is in the order of 900 million tons per year. This resource represents a sizable opportunity to produce renewable chemicals and energy. This paper reports, unprecedently in the literature, the usage of four different urban wastes such as cigarette butts, sanitary pant diapers, newspapers, and soybean peels as cellulose fonts to produce valuable industrial intermediates such as levulinic acid (LA), 5-acetoxymethyl-2-furaldehyde (AMF), 5-(hydroxymethyl)furfural (HMF), and furfural. The process is accomplished by the hydrothermal treatment of cellulosic waste using both Brønsted and Lewis acid catalysts such as CH3COOH (2.5–5.7 M), H3PO4 (15%), and Sc(OTf)3 (20% w:w), thus obtaining HMF (22%), AMF (38%), LA (25–46%), and furfural (22%) with good selectivity and under relatively mild conditions (T = 200 °C, time = 2 h). These final products can be employed in several chemical sectors, for example, as solvents, fuels, and for new materials as a monomer precursor. The characterization of matrices was accomplished by FTIR and LCSM analyses, demonstrating the influence of morphology on reactivity. The low e-factor values and the easy scale up render this protocol suitable for industrial applications.
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Affiliation(s)
- Onofrio Losito
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
| | - Michele Casiello
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
| | - Caterina Fusco
- CNR-Istituto di Chimica dei Composti Organometallici (ICCOM, SS Bari), Via Orabona 4, 70126 Bari, Italy
| | - Helena Mateos Cuadrado
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
| | - Antonio Monopoli
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
| | - Angelo Nacci
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
- CNR-Istituto di Chimica dei Composti Organometallici (ICCOM, SS Bari), Via Orabona 4, 70126 Bari, Italy
| | - Lucia D’Accolti
- Dipartimento di Chimica, Università degli Studi di Bari A. Moro, Via Orabona 4, 70126 Bari, Italy
- CNR-Istituto di Chimica dei Composti Organometallici (ICCOM, SS Bari), Via Orabona 4, 70126 Bari, Italy
- Correspondence:
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5
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Castro GAD, Fernandes SA. One-pot tandem synthesis of 5-ethoxymethylfurfural as a potential biofuel. REACT CHEM ENG 2023. [DOI: 10.1039/d2re00348a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
5-Ethoxymethylfurfural (EMF) is a potential biofuel, fuel additive and raw material in the chemical and beverage industry.
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Affiliation(s)
- Gabriel Abranches Dias Castro
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, CCE, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Sergio Antonio Fernandes
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, CCE, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
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6
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Ragno D, De Risi C, Massi A, Di Carmine G, Toldo S, Leonardi C, Bortolini O. Regiodivergent Synthesis of Benzothiazole‐based Isosorbide Imidates by Oxidative N‐Heterocyclic Carbene Catalysis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daniele Ragno
- University of Ferrara: Universita degli Studi di Ferrara Chemical, Pharmaceutical and Agricultural Sciences ITALY
| | - Carmela De Risi
- University of Ferrara: Universita degli Studi di Ferrara Chemical, Pharmaceutical and Agricultural Sciences ITALY
| | - Alessandro Massi
- University of Ferrara: Universita degli Studi di Ferrara DepartmentEnvironmental and Prevention Sciences ITALY
| | - Graziano Di Carmine
- University of Ferrara: Universita degli Studi di Ferrara Chemical, Pharmaceutical and Agricultural Sciences ITALY
| | - Sofia Toldo
- University of Ferrara: Universita degli Studi di Ferrara Environmental and Prevention Sciences ITALY
| | - Costanza Leonardi
- University of Ferrara: Universita degli Studi di Ferrara Chemical, Pharmaceutical and Agricultural Sciences ITALY
| | - Olga Bortolini
- Universita of Ferrara DepartmentEnvironmental and Prevention Sciences Via Borsari 46 44121 Ferrara ITALY
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7
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8
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Soni JP, Sathish M, Nachtigall FM, Santos LS, Shankaraiah N. Brown seaweed‐derived alginic acid: An efficient and reusable catalyst for Pictet‐Spengler reaction to access tetrahydro‐β‐carboline and tetrahydroisoquinoline frameworks. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jay Prakash Soni
- National Institute of Pharmaceutical Education and Research Hyderabad Department of Medicinal Chemistry 500037 Hyderabad INDIA
| | - Manda Sathish
- Catholic University of the Maule: Universidad Catolica del Maule Research center for Advance Studies of Maule, 3460000 Talca CHILE
| | - Fabiane M. Nachtigall
- Universidad Autonoma de Chile Instituto de Ciencias Quimicas Aplicadas 3467987 Talca CHILE
| | - Leonardo S. Santos
- Talca University: Universidad de Talca Chemistry Institute of Natural Resources 3460000 Talca CHILE
| | - Nagula Shankaraiah
- National Institute of Pharmaceutical Education and Research NIPER Department of Medicinal Chemistry Balanagar 500037 Hyderabad INDIA
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9
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Organocatalytic esterification of polysaccharides for food applications: A review. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.11.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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10
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Wojaczyńska E, Steppeler F, Iwan D, Scherrmann MC, Marra A. Synthesis and Applications of Carbohydrate-Based Organocatalysts. Molecules 2021; 26:7291. [PMID: 34885873 PMCID: PMC8659088 DOI: 10.3390/molecules26237291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/22/2022] Open
Abstract
Organocatalysis is a very useful tool for the asymmetric synthesis of biologically or pharmacologically active compounds because it avoids the use of noxious metals, which are difficult to eliminate from the target products. Moreover, in many cases, the organocatalysed reactions can be performed in benign solvents and do not require anhydrous conditions. It is well-known that most of the above-mentioned reactions are promoted by a simple aminoacid, l-proline, or, to a lesser extent, by the more complex cinchona alkaloids. However, during the past three decades, other enantiopure natural compounds, the carbohydrates, have been employed as organocatalysts. In the present exhaustive review, the detailed preparation of all the sugar-based organocatalysts as well as their catalytic properties are described.
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Affiliation(s)
- Elżbieta Wojaczyńska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Franz Steppeler
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Dominika Iwan
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Marie-Christine Scherrmann
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM-UMR 5247), Université de Montpellier, Pôle Chimie Balard Recherche, 1919 Route de Mende, 34293 Montpellier, France
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11
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Chitosan with Sulfonic Groups: A Catalyst for the Esterification of Caprylic Acid with Methanol. Polymers (Basel) 2021; 13:polym13223924. [PMID: 34833223 PMCID: PMC8624900 DOI: 10.3390/polym13223924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/02/2021] [Accepted: 11/09/2021] [Indexed: 11/25/2022] Open
Abstract
Esterification of caprylic acid with methanol was performed over chitosan with sulfonic acid groups, as a catalyst, at 60 °C. The sulfonic acid groups were introduced into chitosan (CH) by using chlorosulfonic acid. Catalysts were characterized by scanning electron microscopy (SEM), elemental analysis, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and acid–base titration. Catalytic activity increased with the amount of sulfonic acid groups present on chitosan. The 4–CH–SO3H catalyst (chitosan with sulfonic acid groups—sample 4 prepared) showed the highest activity of all materials. The esterification of caprylic acid with methanol was optimized using a 4–CH–SO3H catalyst. Under optimized reaction conditions, it was found that, at 60 °C, with 0.2 g of catalyst loading and with a molar ratio methanol to caprylic acid equal 1:95, a caprylic acid conversion of about 83%, after 4 h could be obtained. Catalytic stability of the 4–CH–SO3H material was evaluated through consecutive batch runs. After the second batch, the catalytic activity stabilized.
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12
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Laurenza AG, Losito O, Casiello M, Fusco C, Nacci A, Pantone V, D'Accolti L. Valorization of cigarette butts for synthesis of levulinic acid as top value-added chemicals. Sci Rep 2021; 11:15775. [PMID: 34349213 PMCID: PMC8338950 DOI: 10.1038/s41598-021-95361-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 07/26/2021] [Indexed: 11/22/2022] Open
Abstract
Unprecedented in the literature, levulinic acid (LA), one of the top value-added intermediates of chemical industry, is obtained from cigarette butts as cellulose feedstock by means of a one-pot hydrothermal process carried out at 200 °C for 2 h and catalysed by phosphoric acid. The protocol avoids the use of more aggressive and toxic H2SO4 and HCl, that are generally employed on several cellulose sources (e.g. sludge paper), thus minimizing corrosion phenomena of plants. Neither chemical pre-treatment of butts nor specific purification procedure of LA are required. Notably, by simply modifying acid catalyst (e.g. using CH3COOH), another top value-added fine chemical such as 5-hydroxymethylfuraldehyde (HMF) is obtained, thus widening the scope of the method. Being cigarette filters a waste available in quantities of megatonnes per year, they represent an unlimited at no cost source of cellulose, thus enabling the up-scale to an industrial level of LA production.
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Affiliation(s)
| | - Onofrio Losito
- Dipartimento di Chimica, Università degli Studi di Bari "A. Moro", Via Orabona 4, 70126, Bari, Italy
| | - Michele Casiello
- Dipartimento di Chimica, Università degli Studi di Bari "A. Moro", Via Orabona 4, 70126, Bari, Italy
| | - Caterina Fusco
- Bari Section, CNR-Istituto di Chimica dei Composti Organometallici (ICCOM), Via Orabona 4, 70126, Bari, Italy
| | - Angelo Nacci
- Dipartimento di Chimica, Università degli Studi di Bari "A. Moro", Via Orabona 4, 70126, Bari, Italy.,Bari Section, CNR-Istituto di Chimica dei Composti Organometallici (ICCOM), Via Orabona 4, 70126, Bari, Italy
| | | | - Lucia D'Accolti
- Dipartimento di Chimica, Università degli Studi di Bari "A. Moro", Via Orabona 4, 70126, Bari, Italy. .,Bari Section, CNR-Istituto di Chimica dei Composti Organometallici (ICCOM), Via Orabona 4, 70126, Bari, Italy.
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13
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Zhang J, Yu H, Xia X, Zhang S, Huang Q, Li C, Miao Q, Zhu F, Yi J, Zhao Z. Sustainable rosin acid ester as internal electron donors in Ziegler-Natta catalysts for synthesis of isotactic polypropylene with high melt flow rate. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1927753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jiaojiao Zhang
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Hongchao Yu
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Xiaoqi Xia
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Shaomeng Zhang
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Qigu Huang
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Chunman Li
- CNPC Key Laboratory of Oil & Gas Storage and Transportation, PetroChina Pipeline R&D Center, Beijing, Hebei Province, China
| | - Qing Miao
- CNPC Key Laboratory of Oil & Gas Storage and Transportation, PetroChina Pipeline R&D Center, Beijing, Hebei Province, China
| | - Feng Zhu
- CNPC Key Laboratory of Oil & Gas Storage and Transportation, PetroChina Pipeline R&D Center, Beijing, Hebei Province, China
| | - Jianjun Yi
- Petrochemical Research Institute, PetroChina, Beijing, China
| | - Zhong Zhao
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, China
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14
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Petitjean M, Isasi JR. Chitosan, xanthan and locust bean gum matrices crosslinked with β-cyclodextrin as green sorbents of aromatic compounds. Int J Biol Macromol 2021; 180:570-577. [PMID: 33753196 DOI: 10.1016/j.ijbiomac.2021.03.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 10/21/2022]
Abstract
Three different polysaccharides, xanthan gum, chitosan and locust bean gum, were crosslinked with or without β-cyclodextrin, using citric acid in different ratios, to create 'green' hydrogel matrices. The crosslinking of these polysaccharides was produced through an inexpensive and innocuous solvent-free synthesis process. A favorable swelling behavior of the hydrophilic matrices facilitates the sorption of the solutes tested. Interestingly, the amount of β-cyclodextrin groups is not the only factor to yield the best sorption capability for hydrophobic model molecules: polysaccharides themselves also influence the sorption depending on their characteristic functional groups, the conformation of their chains and, as mentioned above, their degrees of swelling. In order to ascertain the effect of the polysaccharides on the sorption capabilities of a model sorbate (1-naphthol), isotherms using a wide range of solute concentrations were analyzed, and the Hill equation yielded the best fitting results and provided some insight into the mechanisms of interaction.
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Affiliation(s)
- Max Petitjean
- Department of Chemistry, University of Navarra, 31080 Pamplona, Spain
| | - José Ramón Isasi
- Department of Chemistry, University of Navarra, 31080 Pamplona, Spain.
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15
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Fanjul-Mosteirín N, del Amo V. Organocatalytic transformations in deep eutectic solvents: Green methodologies made greener. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131967] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Xin Y, Shen X, Liu H, Han B. Selective Utilization of N-acetyl Groups in Chitin for Transamidation of Amines. FRONTIERS IN CHEMICAL ENGINEERING 2021. [DOI: 10.3389/fceng.2020.634983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The selective transformation of chitin into various renewable N-containing chemicals and medicines has attracted increasing attention. However, the N-acetyl groups in chitin construct strong hydrogen bond networks, which restricts its depolymerization and transformation. The selective conversion of robust chitin commonly requires considerable base catalysts to remove the N-acetyl group as a byproduct in advance, which is non-compliance with the principle of atomic economy. Herein, for the first time we demonstrate a novel approach to achieve the selective utilization of the N-acetyl group in chitin for transamidation of chitin with amines. A series of amine derivatives, mainly including aliphatic amine, cyclic amine and functionalized aromatic amine, could be selectively converted into the corresponding amide products frequently found in pharmaceuticals. Furthermore, the solid residue after removing the acetyl group (denoted as De-chitin) with the sufficient exposure of -NH2 groups as a solid base catalyst shows excellent performance in the aldol condensation reaction of furfural and acetone to produce fuel precursors. Our process provides a strategy that exploiting every functional group adequately in substrates to obtain value-added chemicals.
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17
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Chiocchio I, Mandrone M, Tomasi P, Marincich L, Poli F. Plant Secondary Metabolites: An Opportunity for Circular Economy. Molecules 2021; 26:495. [PMID: 33477709 PMCID: PMC7831927 DOI: 10.3390/molecules26020495] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/12/2021] [Accepted: 01/15/2021] [Indexed: 12/20/2022] Open
Abstract
Moving toward a more sustainable development, a pivotal role is played by circular economy and a smarter waste management. Industrial wastes from plants offer a wide spectrum of possibilities for their valorization, still being enriched in high added-value molecules, such as secondary metabolites (SMs). The current review provides an overview of the most common SM classes (chemical structures, classification, biological activities) present in different plant waste/by-products and their potential use in various fields. A bibliographic survey was carried out, taking into account 99 research articles (from 2006 to 2020), summarizing all the information about waste type, its plant source, industrial sector of provenience, contained SMs, reported bioactivities, and proposals for its valorization. This survey highlighted that a great deal of the current publications are focused on the exploitation of plant wastes in human healthcare and food (including cosmetic, pharmaceutical, nutraceutical and food additives). However, as summarized in this review, plant SMs also possess an enormous potential for further uses. Accordingly, an increasing number of investigations on neglected plant matrices and their use in areas such as veterinary science or agriculture are expected, considering also the need to implement "greener" practices in the latter sector.
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Affiliation(s)
| | - Manuela Mandrone
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Irnerio 42, 40126 Bologna, Italy; (I.C.); (P.T.); (L.M.); (F.P.)
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18
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Kolcsár VJ, Szőllősi G. Chitosan as a chiral ligand and organocatalyst: preparation conditions–property–catalytic performance relationships. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01674a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Properties of chitosan prepared by alkaline deacetylation of chitin under various conditions were correlated with their performance as ligands or organocatalysts in asymmetric catalytic reactions.
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Affiliation(s)
| | - György Szőllősi
- Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged, Eötvös utca 6, 6720 Szeged, Hungary
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19
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Roy B, Rout N, Kuila P, Sarkar D. Synthesis and structural anomaly of
xyloketals‐unique
benzoxacycles: A review. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Barnali Roy
- Department of Chemistry NIT Rourkela Odisha India
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Reaction coupling separation for isosteviol production from stevioside catalyzed by acidic ion-exchange resin. Bioprocess Biosyst Eng 2020; 44:151-159. [PMID: 32860147 DOI: 10.1007/s00449-020-02431-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 08/17/2020] [Indexed: 10/23/2022]
Abstract
Isosteviol, a prodrug used to be obtained via Wagner-Meerwein rearrangement from steviol with low yield and long reaction time. Herein, an in-situ separation-coupling-reaction is presented to prepare isosteviol from the natural sweetener stevioside. Simply with in-situ water-washing, the product containing 92.98% purity of isosteviol was obtained with a stevioside conversion of 97.23% from a packet bed reactor without further separation. Within the assayed inorganic acid, organic acids and acidic ionic liquids, the acidic ion-exchange resins provided higher product specificity towards isosteviol. Furthermore, comparing to 5-Fluorouracil, the product presented similar and even stronger inhibition on proliferation of the assayed human cancer cells in a time and dose-dependence by causing cell phase arrest. Isosteviol treatment caused G1 arrest on SGC-7901, HCT-8 and HCT-116 cells, S arrest on HepG2, Huh-7 and HepG3B cells, and G2 arrest on MGC-803 cells, respectively. Reaction coupling separation for isosteviol production catalyzed by acidic ion-exchange resin.
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21
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A green and efficient Pd-free protocol for the Suzuki–Miyaura cross-coupling reaction using Fe3O4@APTMS@Cp2ZrClx(x = 0, 1, 2) MNPs in PEG-400. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04145-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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