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Jadhav P, Bhuyar P, Misnon II, Rahim MHA, Roslan R. Advancement of lignin into bioactive compounds through selective organic synthesis methods. Int J Biol Macromol 2024; 276:134061. [PMID: 39043289 DOI: 10.1016/j.ijbiomac.2024.134061] [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: 01/23/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 07/25/2024]
Abstract
The conversion of lignin into bioactive compounds through selective organic synthesis methods represents a promising frontier in the pursuit of sustainable raw materials and green chemistry. This review explores the versatility of lignin-derived bioactive compounds, ranging from their application in drug discovery to their role in the development of biodegradable materials. Despite notable advancements, the synthesis routes and yields of highly bioactive molecules from lignin still require further exploration and improvement. This review provides an in-depth examination of the progress made in understanding the complex structure of lignin and developing innovative approaches to exploit its potential. Specifically, the types of lignins covered include softwood Kraft lignin, hardwood organosolv lignin, and soda lignin. This work is divided into three parts: first, the transformation of lignin into bioactive molecules with chemically active centres and functionalised hydroxyl groups through depolymerisation; second, kinetic modelling techniques essential for understanding the chemical kinetics of lignin and enabling significant scaling up in the conversion of organic molecules; third, efficient catalytic pathways for synthesising molecules with anticancer and antibacterial properties. In conclusion, this comprehensive review spurs further investigations into lignin-derived bioactive compounds, their applications, and the advancement of sustainable processes.
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Affiliation(s)
- Pramod Jadhav
- Centre for Advanced Intelligent Materials, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Malaysia; Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Pahang, Malaysia
| | - Prakash Bhuyar
- International College (MJU-IC), Maejo University, Chiang Mai 50290, Thailand
| | - Izan Izwan Misnon
- Centre for Advanced Intelligent Materials, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Malaysia; Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Pahang, Malaysia
| | - Mohd Hasbi Ab Rahim
- Centre for Advanced Intelligent Materials, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Malaysia; Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Pahang, Malaysia
| | - Rasidi Roslan
- Centre for Advanced Intelligent Materials, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Malaysia; Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang Kuantan, Pahang, Malaysia.
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Wu X, Smet E, Brandi F, Raikwar D, Zhang Z, Maes BUW, Sels BF. Advancements and Perspectives toward Lignin Valorization via O-Demethylation. Angew Chem Int Ed Engl 2024; 63:e202317257. [PMID: 38128012 DOI: 10.1002/anie.202317257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
Lignin represents the largest aromatic carbon resource in plants, holding significant promise as a renewable feedstock for bioaromatics and other cyclic hydrocarbons in the context of the circular bioeconomy. However, the methoxy groups of aryl methyl ethers, abundantly found in technical lignins and lignin-derived chemicals, limit their pertinent chemical reactivity and broader applicability. Unlocking the phenolic hydroxyl functionality through O-demethylation (ODM) has emerged as a valuable approach to mitigate this need and enables further applications. In this review, we provide a comprehensive summary of the progress in the valorization of technical lignin and lignin-derived chemicals via ODM, both catalytic and non-catalytic reactions. Furthermore, a detailed analysis of the properties and potential applications of the O-demethylated products is presented, accompanied by a systematic overview of available ODM reactions. This review primarily focuses on enhancing the phenolic hydroxyl content in lignin-derived species through ODM, showcasing its potential in the catalytic funneling of lignin and value-added applications. A comprehensive synopsis and future outlook are included in the concluding section of this review.
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Affiliation(s)
- Xian Wu
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Ewoud Smet
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Francesco Brandi
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Deepak Raikwar
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Zhenlei Zhang
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Bert U W Maes
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Bert F Sels
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
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Zhu G, Xie H, Ye D, Zhang J, Huang K, Liao B, Chen J. Sustainable production of catechol derivatives from waste tung nutshell C/G-type lignin via heterogeneous Cu-NC catalytic oxidation. RSC Adv 2024; 14:5069-5076. [PMID: 38332785 PMCID: PMC10851056 DOI: 10.1039/d3ra08052h] [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: 11/24/2023] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
The sustainable production of catechol derivatives is a challenging task. Catechyl (C) and guaiacyl (G) lignins coexisting in waste tung nutshells are promising feedstocks to form valuable catechol derivatives, but the depolymerization of C/G lignin typically involves a catalytic reductive process that cannot produce these oxidized aromatic chemicals. Herein, we demonstrated that the sustainable production of catechol derivative aldehydes and acids from C/G lignin could be achieved through a heterogeneous copper-catalyzed oxidative process. Under optimized conditions, the Cu-NC-800 catalyst affords a 43.5 mg g-1 yield (8.9 wt%, based on Klason lignin) of aromatic aldehydes (protocatechuic aldehyde, vanillin) and acids (protocatechuic acid, vanillic acid). XRD and XPS analyses showed that CuO and Cu2O may be the active species during the heterogeneous oxidation of the Cu-NC-800 catalyst. This study opens new opportunities for the sustainable production of catechol derivatives from C/G-type lignin.
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Affiliation(s)
- Guozhi Zhu
- Institute of Chemical Engineering, Guangdong Academy of Sciences Guangzhou 510665 China
| | - Hongmei Xie
- Department of Chemical Engineering, Maoming Vocational and Technical College Maoming 525027 China
- School of Chemistry and Chemical Engineering, Guangzhou University Guangzhou 510006 China
| | - Dawei Ye
- Institute of Chemical Engineering, Guangdong Academy of Sciences Guangzhou 510665 China
| | - Junjie Zhang
- Institute of Chemical Engineering, Guangdong Academy of Sciences Guangzhou 510665 China
| | - Kangping Huang
- Institute of Chemical Engineering, Guangdong Academy of Sciences Guangzhou 510665 China
| | - Bing Liao
- Guangdong Academy of Sciences Guangzhou 510070 China
| | - Jiazhi Chen
- Institute of Chemical Engineering, Guangdong Academy of Sciences Guangzhou 510665 China
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The temptation from homogeneous linear catechyl lignin. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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