1
|
Kawai K, Kato Y, Araki T, Ikawa S, Usui M, Hoshiya N, Kishikawa Y, Escorihuela J, Shibata N. Halo-perfluoroalkoxylation of gem-difluoroalkenes with short-lived alkali metal perfluoroalkoxides in triglyme. Chem Sci 2024; 15:9574-9581. [PMID: 38939153 PMCID: PMC11205273 DOI: 10.1039/d4sc02084g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 05/16/2024] [Indexed: 06/29/2024] Open
Abstract
Alkali metal alkoxides play a pivotal role in nucleophilic alkoxylation reactions, offering pathways for the synthesis of ethers, including the increasingly sought-after trifluoromethyl ethers. However, the synthesis of long-chain perfluoroalkyl ethers remains a substantial challenge in this field. Through the innovative use of triglyme to encapsulate potassium ions, we enhanced the stability of short-lived, longer-chain perfluoroalkoxy anions, thereby facilitating efficient nucleophilic perfluoroalkoxylation reactions. This method provides a new precedent for the halo-perfluoroalkoxylation of gem-difluoroalkenes and offers a versatile tool for the design of perfluoroalkyl ethers, including those containing complex moieties of heterocycles and drug molecules. We also demonstrated the utility of the resulting halo-perfluoroalkoxyl adducts through various chemical transformations to valuable diverse perfluoroalkyl ethers.
Collapse
Affiliation(s)
- Koki Kawai
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Yoshimitsu Kato
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Taichi Araki
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Sota Ikawa
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Mai Usui
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Naoyuki Hoshiya
- Technology Innovation Center, DAIKIN Industries, Ltd 1-1 Nishi-Hitotsuya, Settsu Osaka 566-8585 Japan
| | - Yosuke Kishikawa
- Technology Innovation Center, DAIKIN Industries, Ltd 1-1 Nishi-Hitotsuya, Settsu Osaka 566-8585 Japan
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València Avda. Vicente Andrés Estellés S/N, Burjassot 46100 Valencia Spain
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| |
Collapse
|
2
|
Farshadfar K, Laasonen K. DFT Mechanistic Investigation into Ni(II)-Catalyzed Hydroxylation of Benzene to Phenol by H 2O 2. Inorg Chem 2024; 63:5509-5519. [PMID: 38471975 PMCID: PMC11186014 DOI: 10.1021/acs.inorgchem.3c04461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/31/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024]
Abstract
Introduction of oxygen into aromatic C-H bonds is intriguing from both fundamental and practical perspectives. Although the 3d metal-catalyzed hydroxylation of arenes by H2O2 has been developed by several prominent researchers, a definitive mechanism for these crucial transformations remains elusive. Herein, density functional theory calculations were used to shed light on the mechanism of the established hydroxylation reaction of benzene with H2O2, catalyzed by [NiII(tepa)]2+ (tepa = tris[2-(pyridin-2-yl)ethyl]amine). Dinickel(III) bis(μ-oxo) species have been proposed as the key intermediate responsible for the benzene hydroxylation reaction. Our findings indicate that while the dinickel dioxygen species can be generated as a stable structure, it cannot serve as an active catalyst in this transformation. The calculations allowed us to unveil an unprecedented mechanism composed of six main steps as follows: (i) deprotonation of coordinated H2O2, (ii) oxidative addition, (iii) water elimination, (iv) benzene addition, (v) ketone generation, and (vi) tautomerization and regeneration of the active catalyst. Addition of benzene to oxygen, which occurs via a radical mechanism, turns out to be the rate-determining step in the overall reaction. This study demonstrates the critical role of Ni-oxyl species in such transformations, highlighting how the unpaired spin density value on oxygen and positive charges on the Ni-O• complex affect the activation barrier for benzene addition.
Collapse
Affiliation(s)
- Kaveh Farshadfar
- Department of Chemistry and
Material Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Kari Laasonen
- Department of Chemistry and
Material Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| |
Collapse
|
3
|
Narra SR, Bacho MZ, Hattori M, Shibata N. Expanding the Frontier of Linear Drug Design: Cu-Catalyzed C sp -C sp 3 -Coupling of Electron-Deficient SF 4 -Alkynes with Alkyl Iodides. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306554. [PMID: 38161224 PMCID: PMC10953538 DOI: 10.1002/advs.202306554] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/08/2023] [Indexed: 01/03/2024]
Abstract
Despite the attractive properties of tetrafluorosulfanyl (SF4 ) compounds in drug discovery, medicinal research on SF4 molecules is hindered by the scarcity of suitable synthetic methodologies. Drawing inspiration from the well-established Sonogashira cross-coupling of terminal alkynes under Pd-catalysis, it is envisioned that SF4 -alkynes can serve as effective coupling partners. To overcome the challenges associated with the electron-deficient nature of SF4 -alkynes and the lability of the SF4 unit under transition-metal catalysis, an aryl radical mediated Csp -Csp 3 cross-coupling reaction is successfully developed under Cu catalysis. This methodology facilitates the coupling of SF4 -alkynes with alkyl iodides, leading to the immediate synthesis of SF4 -attached drug-like molecules. These findings highlight the potential impact of SF4 -containing molecules in the drug industry, paving the way for further research in this emerging field.
Collapse
Affiliation(s)
- Srikanth Reddy Narra
- Department of Nanopharmaceutical SciencesNagoya Institute of TechnologyGokiso, Showa‐kuNagoya466‐8555Japan
| | - Muhamad Zulfaqar Bacho
- Department of Nanopharmaceutical SciencesNagoya Institute of TechnologyGokiso, Showa‐kuNagoya466‐8555Japan
| | - Masashi Hattori
- Department of Life Science and Applied ChemistryNagoya Institute of TechnologyGokiso, Showa‐kuNagoya466‐8555Japan
| | - Norio Shibata
- Department of Nanopharmaceutical SciencesNagoya Institute of TechnologyGokiso, Showa‐kuNagoya466‐8555Japan
- Department of Life Science and Applied ChemistryNagoya Institute of TechnologyGokiso, Showa‐kuNagoya466‐8555Japan
| |
Collapse
|
4
|
Hu XB, Fu QQ, Huang XY, Chu XQ, Shen ZL, Miao C, Chen W. Hydroxylation of Aryl Sulfonium Salts for Phenol Synthesis under Mild Reaction Conditions. Molecules 2024; 29:831. [PMID: 38398583 PMCID: PMC10891898 DOI: 10.3390/molecules29040831] [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: 01/11/2024] [Revised: 02/04/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024] Open
Abstract
Hydroxylation of aryl sulfonium salts could be realized by utilizing acetohydroxamic acid and oxime as hydroxylative agents in the presence of cesium carbonate as a base, leading to a variety of structurally diverse hydroxylated arenes in 47-95% yields. In addition, the reaction exhibited broad functionality tolerance, and a range of important functional groups (e.g., cyano, nitro, sulfonyl, formyl, keto, and ester) could be well amenable to the mild reaction conditions.
Collapse
Affiliation(s)
- Xuan-Bo Hu
- Technical Institute of Fluorochemistry (TIF), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China; (X.-B.H.); (Q.-Q.F.); (X.-Y.H.); (X.-Q.C.)
| | - Qian-Qian Fu
- Technical Institute of Fluorochemistry (TIF), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China; (X.-B.H.); (Q.-Q.F.); (X.-Y.H.); (X.-Q.C.)
| | - Xue-Ying Huang
- Technical Institute of Fluorochemistry (TIF), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China; (X.-B.H.); (Q.-Q.F.); (X.-Y.H.); (X.-Q.C.)
| | - Xue-Qiang Chu
- Technical Institute of Fluorochemistry (TIF), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China; (X.-B.H.); (Q.-Q.F.); (X.-Y.H.); (X.-Q.C.)
| | - Zhi-Liang Shen
- Technical Institute of Fluorochemistry (TIF), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China; (X.-B.H.); (Q.-Q.F.); (X.-Y.H.); (X.-Q.C.)
| | - Chengping Miao
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, China
| | - Weiyi Chen
- Soochow College, Soochow University, Suzhou 215006, China
| |
Collapse
|
5
|
Zheng M, Li Y, Zhang Q, Wang W. Selective cascade activation of polycyclic aromatic hydrocarbons in human cells: Role of enzyme's intrinsic electric field. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 911:168645. [PMID: 37992839 DOI: 10.1016/j.scitotenv.2023.168645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/09/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are major environmental organic pollutants. Some metabolites of PAHs show greater toxicity to humans while the others do not. It is highly important to decipher PAHs' regioselective activation mechanism and identify the major metabolites to accurately evaluate their public health risk. Here, we have performed a thorough computational study of benzo[a]anthracene (BA) metabolized by P450 1A1 by employing molecular docking, molecular dynamics simulations, quantum chemical calculation, and quantum mechanics/molecular mechanics calculations. Our findings show that highly-reactive species such as 3,4-epoxide, 8,9-epoxide, 3,4-diol-1,2-epoxide, and 8,9-diol-10,11-epoxide were major metabolites, which can efficiently react with guanine and damage DNA with extremely low energy barrier, therefore, supports the regioselective metabolism of BA. The origin of this selective activation is mainly contributed to both the oxygen‑carbon distance and previously overlooked enzyme's intrinsic electric field. Consequently, based on the resolved activation selectivity of BA. We built a high-throughput strategy to efficiently predict the metabolites of other PAHs. The accuracy of the strategy is validated by studying 16 PAHs on the priority control list. Hopefully this will aid the accurate evaluation of public health risks associated with PAH emissions.
Collapse
Affiliation(s)
- Mingna Zheng
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Yanwei Li
- Environment Research Institute, Shandong University, Qingdao 266237, PR China.
| | - Qingzhu Zhang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| |
Collapse
|
6
|
Taher M, Dubey KD, Mazumdar S. Computationally guided bioengineering of the active site, substrate access pathway, and water channels of thermostable cytochrome P450, CYP175A1, for catalyzing the alkane hydroxylation reaction. Chem Sci 2023; 14:14316-14326. [PMID: 38098704 PMCID: PMC10718072 DOI: 10.1039/d3sc02857g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 11/10/2023] [Indexed: 12/17/2023] Open
Abstract
Understanding structure-function relationships in proteins is pivotal in their development as industrial biocatalysts. In this regard, rational engineering of protein active site access pathways and various tunnels and channels plays a central role in designing competent enzymes with high stability and enhanced efficiency. Here, we report the rational evolution of a thermostable cytochrome P450, CYP175A1, to catalyze the C-H activation reaction of longer-chain alkanes. A strategy combining computational tools with experiments has shown that the substrate scope and enzymatic activity can be enhanced by rational engineering of certain important channels such as the substrate entry and water channels along with the active site of the enzyme. The evolved enzymes showed an improved catalytic rate for hexadecane hydroxylation with high regioselectivity. The Q67L/Y68F mutation showed binding of the substrate in the active site, water channel mutation L80F/V220T showed improved catalytic activity through the peroxide shunt pathway and substrate entry channel mutation W269F/I270A showed better substrate accessibility to the active pocket. All-atom MD simulations provided the rationale for the inactivity of the wild-type CYP175A1 for hexadecane hydroxylation and predicted the above hot-spot residues to enhance the activity. The reaction mechanism was studied by QM/MM calculations for enzyme-substrate complexes and reaction intermediates. Detailed thermal and thermodynamic stability of all the mutants were analyzed and the results showed that the evolved enzymes were thermally stable. The present strategy showed promising results, and insights gained from this work can be applied to the general enzymatic system to expand substrate scope and improve catalytic activity.
Collapse
Affiliation(s)
- Mohd Taher
- Department of Chemical Sciences, Tata Institute of Fundamental Research Homi Bhabha Road, Colaba Mumbai 400005 India
| | - Kshatresh Dutta Dubey
- Department of Chemistry, School of Natural Science, Shiv Nadar Institution of Eminence Delhi-NCR NH91, Tehsil Dadri Greater Noida Uttar Pradesh 201314 India
| | - Shyamalava Mazumdar
- Department of Chemical Sciences, Tata Institute of Fundamental Research Homi Bhabha Road, Colaba Mumbai 400005 India
| |
Collapse
|
7
|
Sun Y, Huang X, Osawa Y, Chen YE, Zhang H. The Versatile Biocatalyst of Cytochrome P450 CYP102A1: Structure, Function, and Engineering. Molecules 2023; 28:5353. [PMID: 37513226 PMCID: PMC10383305 DOI: 10.3390/molecules28145353] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Wild-type cytochrome P450 CYP102A1 from Bacillus megaterium is a highly efficient monooxygenase for the oxidation of long-chain fatty acids. The unique features of CYP102A1, such as high catalytic activity, expression yield, regio- and stereoselectivity, and self-sufficiency in electron transfer as a fusion protein, afford the requirements for an ideal biocatalyst. In the past three decades, remarkable progress has been made in engineering CYP102A1 for applications in drug discovery, biosynthesis, and biotechnology. The repertoire of engineered CYP102A1 variants has grown tremendously, whereas the substrate repertoire is avalanched to encompass alkanes, alkenes, aromatics, organic solvents, pharmaceuticals, drugs, and many more. In this article, we highlight the major advances in the past five years in our understanding of the structure and function of CYP102A1 and the methodologies used to engineer CYP102A1 for novel applications. The objective is to provide a succinct review of the latest developments with reference to the body of CYP102A1-related literature.
Collapse
Affiliation(s)
- Yudong Sun
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA; (Y.S.); (Y.O.)
| | - Xiaoqiang Huang
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA;
| | - Yoichi Osawa
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA; (Y.S.); (Y.O.)
| | - Yuqing Eugene Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA;
| | - Haoming Zhang
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA; (Y.S.); (Y.O.)
| |
Collapse
|
8
|
Rajakumara E, Saniya D, Bajaj P, Rajeshwari R, Giri J, Davari MD. Hijacking Chemical Reactions of P450 Enzymes for Altered Chemical Reactions and Asymmetric Synthesis. Int J Mol Sci 2022; 24:ijms24010214. [PMID: 36613657 PMCID: PMC9820634 DOI: 10.3390/ijms24010214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/25/2022] Open
Abstract
Cytochrome P450s are heme-containing enzymes capable of the oxidative transformation of a wide range of organic substrates. A protein scaffold that coordinates the heme iron, and the catalytic pocket residues, together, determine the reaction selectivity and regio- and stereo-selectivity of the P450 enzymes. Different substrates also affect the properties of P450s by binding to its catalytic pocket. Modulating the redox potential of the heme by substituting iron-coordinating residues changes the chemical reaction, the type of cofactor requirement, and the stereoselectivity of P450s. Around hundreds of P450s are experimentally characterized, therefore, a mechanistic understanding of the factors affecting their catalysis is increasingly vital in the age of synthetic biology and biotechnology. Engineering P450s can enable them to catalyze a variety of chemical reactions viz. oxygenation, peroxygenation, cyclopropanation, epoxidation, nitration, etc., to synthesize high-value chiral organic molecules with exceptionally high stereo- and regioselectivity and catalytic efficiency. This review will focus on recent studies of the mechanistic understandings of the modulation of heme redox potential in the engineered P450 variants, and the effect of small decoy molecules, dual function small molecules, and substrate mimetics on the type of chemical reaction and the catalytic cycle of the P450 enzymes.
Collapse
Affiliation(s)
- Eerappa Rajakumara
- Macromolecular Structural Biology Lab, Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502284, India
- Correspondence: (E.R.); (M.D.D.)
| | - Dubey Saniya
- Macromolecular Structural Biology Lab, Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502284, India
| | - Priyanka Bajaj
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), NH-44, Balanagar, Hyderabad 500037, India
| | - Rajanna Rajeshwari
- Department of Plant Pathology, College of Horticulture, University of Horticultural Sciences, Bagalkot Campus, GKVK, Bengaluru 560064, India
| | - Jyotsnendu Giri
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502284, India
| | - Mehdi D. Davari
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
- Correspondence: (E.R.); (M.D.D.)
| |
Collapse
|
9
|
Meng S, Ji Y, Zhu L, Dhoke GV, Davari MD, Schwaneberg U. The molecular basis and enzyme engineering strategies for improvement of coupling efficiency in cytochrome P450s. Biotechnol Adv 2022; 61:108051. [DOI: 10.1016/j.biotechadv.2022.108051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/26/2022] [Accepted: 10/13/2022] [Indexed: 11/28/2022]
|
10
|
Wang Z, Zeng Y, Jia H, Yang N, Liu M, Jiang M, Zheng Y. Bioconversion of vitamin D 3 to bioactive calcifediol and calcitriol as high-value compounds. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:109. [PMID: 36229827 PMCID: PMC9563128 DOI: 10.1186/s13068-022-02209-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022]
Abstract
Biological catalysis is an important approach for the production of high-value-added compounds, especially for products with complex structures. Limited by the complex steps of chemical synthesis and low yields, the bioconversion of vitamin D3 (VD3) to calcifediol and calcitriol, which are natural steroid products with high added value and significantly higher biological activity compared to VD3, is probably the most promising strategy for calcifediol and calcitriol production, and can be used as an alternative method for chemical synthesis. The conversion efficiency of VD3 to calcifediol and calcitriol has continued to rise in the past few decades with the help of several different VD3 hydroxylases, mostly cytochrome P450s (CYPs), and newly isolated strains. The production of calcifediol and calcitriol can be systematically increased in different ways. Specific CYPs and steroid C25 dehydrogenase (S25DH), as VD3 hydroxylases, are capable of converting VD3 to calcifediol and calcitriol. Some isolated actinomycetes have also been exploited for fermentative production of calcifediol and calcitriol, although the VD3 hydroxylases of these strains have not been elucidated. With the rapid development of synthetic biology and enzyme engineering, quite a lot of advances in bioproduction of calcifediol and calcitriol has been achieved in recent years. Therefore, here we review the successful strategies of promoting VD3 hydroxylation and provide some perspective on how to further improve the bioconversion of VD3 to calcifediol and calcitriol.
Collapse
Affiliation(s)
- Zheyi Wang
- grid.9227.e0000000119573309State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101 China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, 100049 China
| | - Yan Zeng
- grid.9227.e0000000119573309State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101 China
| | - Hongmin Jia
- China Animal Husbandry Industry Co. Ltd, Beijing, 100095 China
| | - Niping Yang
- grid.256885.40000 0004 1791 4722School of Life Sciences, Hebei University, No. 180 Wusi Dong Road, Baoding, 071002 China
| | - Mengshuang Liu
- grid.9227.e0000000119573309State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101 China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, 100049 China
| | - Mingyue Jiang
- grid.9227.e0000000119573309State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101 China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing, 100049 China
| | - Yanning Zheng
- grid.9227.e0000000119573309State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101 China
| |
Collapse
|
11
|
Li Z, Park HS, Qiao JX, Yeung KS, Yu JQ. Ligand-Enabled C-H Hydroxylation with Aqueous H 2O 2 at Room Temperature. J Am Chem Soc 2022; 144:18109-18116. [PMID: 36137252 PMCID: PMC10292862 DOI: 10.1021/jacs.2c08332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the large number of Pd(II)-catalyzed C-H activation reactions of native substrates developed in the past decade, the development of catalysts to enable the use of green oxidants under safe and practical conditions has become an increasingly important challenge. Notably, the compatibility of Pd(II) catalysts with sustainable aqueous H2O2 has been a long-standing challenge in catalysis including Wacker-type oxidations. We report herein a bifunctional bidentate carboxyl-pyridone (CarboxPyridone) ligand that enables room-temperature Pd-catalyzed C-H hydroxylation of a broad range of benzoic and phenylacetic acids with an industry-compatible oxidant, aqueous hydrogen peroxide (35% H2O2). The scalability of this methodology is demonstrated by a 1000 mmol scale reaction of ibuprofen (206 g) using only a 1 mol % Pd catalyst loading. The utility of this protocol is further illustrated through derivatization of the products and synthesis of polyfluorinated natural product coumestan and pterocarpene from phenol intermediates prepared using this methodology.
Collapse
Affiliation(s)
- Zhen Li
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
| | - Han Seul Park
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
| | - Jennifer X. Qiao
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, NJ 08543, USA
| | - Kap-Sun Yeung
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, 100 Binney Street, Cambridge, MA 02142, USA
| | - Jin-Quan Yu
- The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
| |
Collapse
|
12
|
Han W, Xiang W, Shi J, Ji Y. Recent Advances in the Heterogeneous Photocatalytic Hydroxylation of Benzene to Phenol. Molecules 2022; 27:molecules27175457. [PMID: 36080224 PMCID: PMC9457663 DOI: 10.3390/molecules27175457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/18/2022] [Accepted: 08/20/2022] [Indexed: 11/16/2022] Open
Abstract
Phenol is an important chemical material that is widely used in industry. Currently, phenol is dominantly produced by the well−known three−step cumene process, which suffers from severe drawbacks. Therefore, developing a green, sustainable, and economical strategy for the production of phenol directly from benzene is urgently needed. In recent years, the photocatalytic hydroxylation of benzene to phenol, which is economically feasible and could be performed under mild conditions, has attracted more attention, and development of highly efficient photocatalyst would be a key issue in this field. In this review, we systematically introduce the recent achievements of photocatalytic hydroxylation of benzene to phenol from 2015 to mid−2022, and various heterogeneous photocatalysts are comprehensively reviewed, including semiconductors, polyoxometalates (POMs), graphitic carbon nitride (g−C3N4), metal–organic frameworks (MOFs), carbon materials, and some other types of photocatalysts. Much effort is focused on the physical and chemical approaches for modification of these photocatalysts. The challenges and future promising directions for further enhancing the catalytic performances in photocatalytic hydroxylation of benzene are discussed in the end.
Collapse
Affiliation(s)
- Weiwei Han
- Correspondence: ; Tel.: +86-29-8838-2703
| | | | | | | |
Collapse
|
13
|
Rajeev A, Balamurugan M, Sankaralingam M. Rational Design of First-Row Transition Metal Complexes as the Catalysts for Oxidation of Arenes: A Homogeneous Approach. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anjana Rajeev
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| | - Mani Balamurugan
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Muniyandi Sankaralingam
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| |
Collapse
|
14
|
Vincent T, Gaillet B, Garnier A. Oleic acid based experimental evolution of Bacillus megaterium yielding an enhanced P450 BM3 variant. BMC Biotechnol 2022; 22:20. [PMID: 35831844 PMCID: PMC9281120 DOI: 10.1186/s12896-022-00750-w] [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: 02/10/2022] [Accepted: 06/28/2022] [Indexed: 12/02/2022] Open
Abstract
Background Unlike most other P450 cytochrome monooxygenases, CYP102A1 from Bacillus megaterium (BM3) is both soluble and fused to its redox partner forming a single polypeptide chain. Like other monooxygenases, it can catalyze the insertion of oxygen unto the carbon-hydrogen bond which can result in a wide variety of commercially relevant products for pharmaceutical and fine chemical industries. However, the instability of the enzyme holds back the implementation of a BM3-based biocatalytic industrial processes due to the important enzyme cost it would prompt. Results In this work, we sought to enhance BM3’s total specific product output by using experimental evolution, an approach not yet reported to improve this enzyme. By exploiting B. megaterium’s own oleic acid metabolism, we pressed the evolution of a new variant of BM3, harbouring 34 new amino acid substitutions. The resulting variant, dubbed DE, increased the conversion of the substrate 10-pNCA to its product p-nitrophenolate 1.23 and 1.76-fold when using respectively NADPH or NADH as a cofactor, compared to wild type BM3. Conclusions This new DE variant, showed increased organic cosolvent tolerance, increased product output and increased versatility in the use of either nicotinamide cofactors NADPH and NADH. Experimental evolution can be used to evolve or to create libraries of evolved BM3 variants with increased productivity and cosolvent tolerance. Such libraries could in turn be used in bioinformatics to further evolve BM3 more precisely. The experimental evolution results also supports the hypothesis which surmises that one of the roles of BM3 in Bacillus megaterium is to protect it from exogenous unsaturated fatty acids by breaking them down. Supplementary Information The online version contains supplementary material available at 10.1186/s12896-022-00750-w.
Collapse
Affiliation(s)
- Thierry Vincent
- Department of Chemical Engineering, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - Bruno Gaillet
- Department of Chemical Engineering, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - Alain Garnier
- Department of Chemical Engineering, Université Laval, Québec, Québec, G1V 0A6, Canada.
| |
Collapse
|
15
|
Karasawa M, Yonemura K, Stanfield JK, Suzuki K, Shoji O. Ein Designeraußenmembranprotein fördert die Aufnahme von Täuschmolekülen in einen auf Zytochrom P450BM3 beruhenden Ganzzellbiokatalysator. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Masayuki Karasawa
- Department of Chemistry Graduate School of Science Universität Nagoya Furo-cho, Chikusa-ku, Nagoya 464-8602 Japan
| | - Kai Yonemura
- Department of Chemistry Graduate School of Science Universität Nagoya Furo-cho, Chikusa-ku, Nagoya 464-8602 Japan
| | - Joshua Kyle Stanfield
- Department of Chemistry Graduate School of Science Universität Nagoya Furo-cho, Chikusa-ku, Nagoya 464-8602 Japan
| | - Kazuto Suzuki
- Department of Chemistry Graduate School of Science Universität Nagoya Furo-cho, Chikusa-ku, Nagoya 464-8602 Japan
| | - Osami Shoji
- Department of Chemistry Graduate School of Science Universität Nagoya Furo-cho, Chikusa-ku, Nagoya 464-8602 Japan
- Core Research for Evolutional Science and Technology (Japan) Science and Technology Agency 5 Sanbancho Chiyoda-ku, Tokio 102-0075 Japan
| |
Collapse
|
16
|
Coleman T, Kirk AM, Lee JHZ, Doherty DZ, Bruning JB, Krenske EH, De Voss JJ, Bell SG. Different Geometric Requirements for Cytochrome P450-Catalyzed Aliphatic Versus Aromatic Hydroxylation Results in Chemoselective Oxidation. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05483] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tom Coleman
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Alicia M. Kirk
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Joel H. Z. Lee
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Daniel Z. Doherty
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - John B. Bruning
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Elizabeth H. Krenske
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - James J. De Voss
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Stephen G. Bell
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| |
Collapse
|
17
|
Abstract
Biocatalysis has an enormous impact on chemical synthesis. The waves in which biocatalysis has developed, and in doing so changed our perception of what organic chemistry is, were reviewed 20 and 10 years ago. Here we review the consequences of these waves of development. Nowadays, hydrolases are widely used on an industrial scale for the benign synthesis of commodity and bulk chemicals and are fully developed. In addition, further enzyme classes are gaining ever increasing interest. Particularly, enzymes catalysing selective C-C-bond formation reactions and enzymes catalysing selective oxidation and reduction reactions are solving long-standing synthetic challenges in organic chemistry. Combined efforts from molecular biology, systems biology, organic chemistry and chemical engineering will establish a whole new toolbox for chemistry. Recent developments are critically reviewed.
Collapse
Affiliation(s)
- Ulf Hanefeld
- Biocatalysis, Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, The Netherlands.
| | - Frank Hollmann
- Biocatalysis, Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, The Netherlands.
| | - Caroline E Paul
- Biocatalysis, Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, The Netherlands.
| |
Collapse
|
18
|
Karasawa M, Yonemura K, Stanfield JK, Suzuki K, Shoji O. Designer Outer Membrane Protein Facilitates Uptake of Decoy Molecules into a Cytochrome P450BM3-Based Whole-Cell Biocatalyst. Angew Chem Int Ed Engl 2021; 61:e202111612. [PMID: 34704327 DOI: 10.1002/anie.202111612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Indexed: 11/11/2022]
Abstract
We report an OmpF loop deletion mutant, which improves the cellular uptake of external additives into an Escherichia coli whole-cell biocatalyst. Through co-expression of the OmpF mutant with wild-type P450BM3 in the presence of decoy molecules, the yield of the whole-cell biotransformation of benzene could be considerably improved. Notably, with C7AM-Pip-Phe the yield duodecupled from 5.7% to 70%, with 80% phenol selectivity. The benzylic hydroxylation of alkyl- and cycloalkylbenzenes was also examined, and with the aid of decoy molecules, propylbenzene and tetralin were converted to 1-hydroxylated products with 78% yield and 94% ( R ) ee for propylbenzene and 92% yield and 94% ( S ) ee for tetralin. Our results suggest that both the decoy molecule and substrate traverse the artificial channel, synergistically boosting whole-cell bioconversions.
Collapse
Affiliation(s)
- Masayuki Karasawa
- Nagoya University: Nagoya Daigaku, Chemistry, Science & Agricultural Building SA601, Furo-cho, Chikusa-ku, 464-8602, Nagoya-shi, JAPAN
| | - Kai Yonemura
- Nagoya University: Nagoya Daigaku, Chemistry, Science & Agricultural Building SA601, Furo-cho, Chikusa-ku, 464-8602, Nagoya-shi, JAPAN
| | - Joshua Kyle Stanfield
- Nagoya University: Nagoya Daigaku, Chemistry, Science & Agricultural Building SA601, Furo-cho, Chikusa-ku, 464-8602, Nagoya-shi, JAPAN
| | - Kazuto Suzuki
- Nagoya University: Nagoya Daigaku, Chemistry, Science & Agricultural Building SA601, Furo-cho, Chikusa-ku, 464-8602, Nagoya-shi, JAPAN
| | - Osami Shoji
- Nagoya University, Graduate School of Science, Furo, Chikusa,, 464-8602, Nagoya, JAPAN
| |
Collapse
|
19
|
Qin L, Feng Z, Zhang Q, Mao H, Cheng F, Shi S. Enhanced Hydroxylation of Benzene to Phenol with Hydrogen Peroxide over g-C 3N 4 Quantum Dots-Modified Fe-SBA-15 Catalysts: Synergistic Effect Among Fe Species, g-C 3N 4 QDs, and Porous Structure. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lizhen Qin
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu Province 213001, P. R China
| | - Zhengyu Feng
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu Province 213164, P. R China
| | - Qing Zhang
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu Province 213164, P. R China
| | - Huihui Mao
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu Province 213164, P. R China
| | - Fei Cheng
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu Province 213164, P. R China
| | - Shaoming Shi
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu Province 213164, P. R China
| |
Collapse
|
20
|
Zhang L, Wang Q. Harnessing P450 Enzyme for Biotechnology and Synthetic Biology. Chembiochem 2021; 23:e202100439. [PMID: 34542923 DOI: 10.1002/cbic.202100439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 09/18/2021] [Indexed: 12/29/2022]
Abstract
Cytochrome P450 enzymes (P450s, CYPs) catalyze the oxidative transformation of a wide range of organic substrates. Their functions are crucial to xenobiotic metabolism and steroid transformation in humans and other organisms. The enzymes are promising for synthetic biology applications but limited by several drawbacks including low turnover rates, poor stability, the dependance of expensive cofactors and redox partners, and the narrow substrate scope. To conquer these obstacles, emerging strategies including substrate engineering, usage of decoy and decoy-based small molecules auxiliaries, designing of artificial enzyme cascades and the incorporation of materials have been explored based on the unique properties of P450s. These strategies can be applied to a wide range of P450s and can be combined with protein engineering to improve the enzymatic activities. This minireview will focus on some recent developments of these strategies which have been used to leverage P450 catalysis. Remaining challenges and future opportunities will also be discussed.
Collapse
Affiliation(s)
- Libo Zhang
- Department of Chemistry and Biochemistry University of South Carolina, 631 Sumter Street, Columbia, SC 29208, USA.,Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Qian Wang
- Department of Chemistry and Biochemistry University of South Carolina, 631 Sumter Street, Columbia, SC 29208, USA
| |
Collapse
|
21
|
Kang Q, Lin Y, Li Y, Xu L, Li K, Shi H. Catalytic S
N
Ar Hydroxylation and Alkoxylation of Aryl Fluorides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Qi‐Kai Kang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| | - Yunzhi Lin
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| | - Yuntong Li
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| | - Lun Xu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| | - Ke Li
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| | - Hang Shi
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study 18 Shilongshan Road Hangzhou 310024 Zhejiang Province China
| |
Collapse
|
22
|
Kang QK, Lin Y, Li Y, Xu L, Li K, Shi H. Catalytic S N Ar Hydroxylation and Alkoxylation of Aryl Fluorides. Angew Chem Int Ed Engl 2021; 60:20391-20399. [PMID: 34263536 DOI: 10.1002/anie.202106440] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/08/2021] [Indexed: 12/14/2022]
Abstract
Nucleophilic aromatic substitution (SN Ar) is a powerful strategy for incorporating a heteroatom into an aromatic ring by displacement of a leaving group with a nucleophile, but this method is limited to electron-deficient arenes. We have now established a reliable method for accessing phenols and phenyl alkyl ethers via catalytic SN Ar reactions. The method is applicable to a broad array of electron-rich and neutral aryl fluorides, which are inert under classical SN Ar conditions. Although the mechanism of SN Ar reactions involving metal arene complexes is hypothesized to involve a stepwise pathway (addition followed by elimination), experimental data that support this hypothesis is still under exploration. Mechanistic studies and DFT calculations suggest either a stepwise or stepwise-like energy profile. Notably, we isolated a rhodium η5 -cyclohexadienyl complex intermediate with an sp3 -hybridized carbon bearing both a nucleophile and a leaving group.
Collapse
Affiliation(s)
- Qi-Kai Kang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| | - Yunzhi Lin
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| | - Yuntong Li
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| | - Lun Xu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| | - Ke Li
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| | - Hang Shi
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, China
| |
Collapse
|
23
|
Zhang L, Ma D, Yin Y, Wang Q. Using Small Molecules to Enhance P450 OleT Enzyme Activity in Situ. Chemistry 2021; 27:8940-8945. [PMID: 33860584 DOI: 10.1002/chem.202100680] [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: 02/24/2021] [Indexed: 11/09/2022]
Abstract
Cytochrome P450 OleT is a fatty acid decarboxylase that catalyzes the production of olefins with biofuel and synthetic applications. However, the relatively sluggish catalytic efficiency of the enzyme limits its applications. Here, we report the application of a novel class of benzene containing small molecules to improve the OleT activity. The UV-Vis spectroscopy study and molecular docking results confirmed the high proximity of the small molecules to the heme group of OleT. Up to 6-fold increase of product yield has been achieved in the small molecule-modulated enzymatic reactions. Our work thus sheds the light to the application of small molecules to increase the OleT catalytic efficiency, which could be potentially used for future olefin productions.
Collapse
Affiliation(s)
- Libo Zhang
- Department of Chemistry and Biochemistry, University of South Carolina, 29205, Columbia, SC, USA
| | - Dumei Ma
- Department of Chemical and Biochemical Engineering, Xiamen University, Siming South Load 422, 361005, Xiamen, Fujian, P. R. China
| | - Yingwu Yin
- Department of Chemical and Biochemical Engineering, Xiamen University, Siming South Load 422, 361005, Xiamen, Fujian, P. R. China
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, 29205, Columbia, SC, USA
| |
Collapse
|
24
|
Gui W, Zhang C, Zhu W, Zhang L, Liu X, Zhang H, Wang Z. Application of two morphologies of Mn 2O 3 for efficient catalytic ortho-methylation of 4-chlorophenol. RSC Adv 2021; 11:20836-20849. [PMID: 35479377 PMCID: PMC9033982 DOI: 10.1039/d1ra01062j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/28/2021] [Indexed: 11/21/2022] Open
Abstract
Vapor phase ortho-methylation of 4-chlorophenol with methanol was studied over Mn2O3 catalyst with two kinds of morphologies. Here, Mn2O3 was prepared by a precipitation and hydrothermal method, and showed the morphology of nanoparticles and nanowires, respectively. XRD characterization and BET results showed that, with the increase of calcination temperature, Mn2O3 had a higher crystallinity and a smaller specific surface area. N2 adsorption/desorption and TPD measurements indicated that Mn2O3 nanowires possessed larger external surface areas and more abundant acid and base sites. Simultaneously, in the fixed bed reactor, methanol was used as the methylation reagent for the ortho-methylation reaction of 4-chlorophenol. XRD, XPS, TG-MS and other characterizations made it clear that methanol reduced 4-chlorophenol and its methide, which were the main side-reactions. And Mn3+ was reduced to Mn2+ under the reaction conditions. Changing the carrier gas N2 to a H2/Ar mixture further verified that the hydrogen generated by the decomposition of methanol was not the reason for dechlorination of 4-chlorophenol compounds. Here we summarized the progress of 4-chlorophenol methylation based on the methylation of phenol. Also, we proposed a mechanism of the 4-chlorophenol dechlorination effect which was similar to the Meerwein-Ponndorf-Verley-type (MPV) reaction. The crystal phase and carbon deposition were investigated in different reaction periods by XRD and TG-DTA. The reaction conditions for the two kinds of morphologies of the Mn2O3 catalyst such as calcination temperature, reaction temperature, phenol-methanol ratio and reaction space velocity were optimized.
Collapse
Affiliation(s)
- Wenying Gui
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| | - Chunlei Zhang
- The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University 100 Guilin Road Shanghai 200234 PR China
| | - Wanchun Zhu
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| | - Li Zhang
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| | - Xiaofei Liu
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| | - Hongqiang Zhang
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| | - Zhenlu Wang
- Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University Qianjin Road 2699 Changchun 130012 PR China +86-431-88499140
| |
Collapse
|
25
|
Lin YW. Biodegradation of aromatic pollutants by metalloenzymes: A structural-functional-environmental perspective. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213774] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
26
|
Kumari S, Muthuramalingam S, Dhara AK, Singh UP, Mayilmurugan R, Ghosh K. Cu(I) complexes obtained via spontaneous reduction of Cu(II) complexes supported by designed bidentate ligands: bioinspired Cu(I) based catalysts for aromatic hydroxylation. Dalton Trans 2020; 49:13829-13839. [PMID: 33001072 DOI: 10.1039/d0dt02413a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Copper(i) complexes [Cu(L1-7)2](ClO4) (1-7) of bidentate ligands (L1-L7) have been synthesized via spontaneous reduction and characterized as catalysts for aromatic C-H activation using H2O2 as the oxidant. The single crystal X-ray structure of 1 exhibited a distorted tetrahedral geometry. All the copper(i) complexes catalyzed direct hydroxylation of benzene to form phenol with good selectivity up to 98%. The determined kinetic isotope effect (KIE) values, 1.69-1.71, support the involvement of a radical type mechanism. The isotope-labeling experiments using H218O2 showed 92% incorporation of 18O into phenol and confirm that H2O2 is the key oxygen supplier. Overall, the catalytic efficiencies of the complexes are strongly influenced by the electronic and steric factor of the ligand, which is fine-tuned by the ligand architecture. The benzene hydroxylation reaction possibly proceeded via a radical mechanism, which was confirmed by the addition of radical scavengers (TEMPO) to the catalytic reaction that showed a reduction in phenol formation.
Collapse
Affiliation(s)
- Sheela Kumari
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India.
| | - Sethuraman Muthuramalingam
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625021, India.
| | - Ashish Kumar Dhara
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India.
| | - U P Singh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India.
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625021, India.
| | - Kaushik Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India.
| |
Collapse
|
27
|
Suzuki K, Shisaka Y, Stanfield JK, Watanabe Y, Shoji O. Enhanced cis- and enantioselective cyclopropanation of styrene catalysed by cytochrome P450BM3 using decoy molecules. Chem Commun (Camb) 2020; 56:11026-11029. [PMID: 32895681 DOI: 10.1039/d0cc04883f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the enhanced cis- and enantioselective cyclopropanation of styrene catalysed by cytochrome P450BM3 in the presence of dummy substrates, i.e. decoy molecules. With the aid of the decoy molecule R-Ibu-Phe, diastereoselectivity for the cis diastereomers reached 91%, and the enantiomeric ratio for the (1S,2R) isomer reached 94%. Molecular dynamics simulations underpin the experimental data, revealing the mechanism of how enantioselectivity is controlled by the addition of decoy molecules.
Collapse
Affiliation(s)
- Kazuto Suzuki
- Department of Chemistry, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-0802, Japan.
| | - Yuma Shisaka
- Department of Chemistry, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-0802, Japan.
| | - Joshua Kyle Stanfield
- Department of Chemistry, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-0802, Japan.
| | - Yoshihito Watanabe
- Department of Chemistry, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-0802, Japan.
| | - Osami Shoji
- Department of Chemistry, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-0802, Japan. and Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, 5 Sanban-cho, Chiyoda-ku, Tokyo, 102-0075, Japan
| |
Collapse
|
28
|
Current state and future perspectives of engineered and artificial peroxygenases for the oxyfunctionalization of organic molecules. Nat Catal 2020. [DOI: 10.1038/s41929-020-00507-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
29
|
Goyal R, Singh O, Agrawal A, Samanta C, Sarkar B. Advantages and limitations of catalytic oxidation with hydrogen peroxide: from bulk chemicals to lab scale process. CATALYSIS REVIEWS 2020. [DOI: 10.1080/01614940.2020.1796190] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Reena Goyal
- Refinery Technology Division, CSIR-Indian Institute of Petroleum, Dehradun, India
- Department of Chemical Engineering, Indian Institute of Technology-Roorkee, Uttarakhand, India
| | - Omvir Singh
- Upstream & Wax Rheology Division, CSIR-Indian Institute of Petroleum, Dehradun, India
| | - Ankit Agrawal
- Upstream & Wax Rheology Division, CSIR-Indian Institute of Petroleum, Dehradun, India
| | - Chanchal Samanta
- Corporate R&D Center, Bharat Petroleum Corporation Limited, Greater Noida, India
| | - Bipul Sarkar
- Upstream & Wax Rheology Division, CSIR-Indian Institute of Petroleum, Dehradun, India
- SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, Gyeong Gi-Do, South Korea
| |
Collapse
|
30
|
Yamaguchi S, Ihara D, Yamashita Y, Uemoto Y, Yahiro H. Catalytic oxidation of cyclic hydrocarbons with hydrogen peroxide using Fe complexes immobilized into montmorillonite. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.12.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
31
|
Leone L, Chino M, Nastri F, Maglio O, Pavone V, Lombardi A. Mimochrome, a metalloporphyrin‐based catalytic Swiss knife†. Biotechnol Appl Biochem 2020; 67:495-515. [DOI: 10.1002/bab.1985] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 07/09/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Linda Leone
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
| | - Marco Chino
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
| | - Flavia Nastri
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
| | - Ornella Maglio
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
- IBB ‐ National Research Council Napoli Italy
| | - Vincenzo Pavone
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
| | - Angela Lombardi
- Department of Chemical Sciences University of Napoli “Federico II” Napoli Italy
| |
Collapse
|
32
|
Yonemura K, Ariyasu S, Stanfield JK, Suzuki K, Onoda H, Kasai C, Sugimoto H, Aiba Y, Watanabe Y, Shoji O. Systematic Evolution of Decoy Molecules for the Highly Efficient Hydroxylation of Benzene and Small Alkanes Catalyzed by Wild-Type Cytochrome P450BM3. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01951] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Kai Yonemura
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Shinya Ariyasu
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Joshua Kyle Stanfield
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Kazuto Suzuki
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Hiroki Onoda
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Chie Kasai
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Hiroshi Sugimoto
- RIKEN SPring-8 Center, Harima Institute, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
- Graduate School of Life Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
- Core Research for Evolutional Science and Technology (Japan), Science and Technology Agency, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Yuichiro Aiba
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Yoshihito Watanabe
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Osami Shoji
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Core Research for Evolutional Science and Technology (Japan), Science and Technology Agency, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
| |
Collapse
|
33
|
Watanabe Y, Aiba Y, Ariyasu S, Abe S. Molecular Design and Regulation of Metalloenzyme Activities through Two Novel Approaches: Ferritin and P450s. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190305] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yoshihito Watanabe
- Research Center for Materials Science, Nagoya University, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Yuichiro Aiba
- Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Shinya Ariyasu
- Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Satoshi Abe
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuda-cho, Yokohama, Kanagawa, Japan
| |
Collapse
|
34
|
Wei Mi, Han W, Li J, Zheng Y, Zhang Z. Direct Hydroxylation of Benzene to Phenol by Dielectric Barrier Discharge Plasma. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s003602441913020x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
35
|
Jiang Y, Wang C, Ma N, Chen J, Liu C, Wang F, Xu J, Cong Z. Regioselective aromatic O-demethylation with an artificial P450BM3 peroxygenase system. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00241k] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly regioselective O-demethylation of aromatic ethers related to the bioconversion of lignin was achieved by the H2O2-dependent engineered P450BM3 enzymes with assistance of a dual-functional small molecule (DFSM) for the first time.
Collapse
Affiliation(s)
- Yihui Jiang
- Key Lab of Sustainable Development of Polar Fisheries
- Ministry of Agriculture and Rural Affairs
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
- Lab for Marine Drugs and Byproducts of Pilot National Lab for Marine Science and Technology
- Qingdao 266071
| | - Chunlan Wang
- Key Lab of Sustainable Development of Polar Fisheries
- Ministry of Agriculture and Rural Affairs
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
- Lab for Marine Drugs and Byproducts of Pilot National Lab for Marine Science and Technology
- Qingdao 266071
| | - Nana Ma
- CAS Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of Synthetic Biology
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
- Qingdao
- China
- University of Chinese Academy of Sciences
| | - Jie Chen
- CAS Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of Synthetic Biology
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
- Qingdao
- China
- University of Chinese Academy of Sciences
| | - Chuanfei Liu
- CAS Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of Synthetic Biology
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
- Qingdao
- China
| | - Fang Wang
- Key Lab of Sustainable Development of Polar Fisheries
- Ministry of Agriculture and Rural Affairs
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
- Lab for Marine Drugs and Byproducts of Pilot National Lab for Marine Science and Technology
- Qingdao 266071
| | - Jiakun Xu
- Key Lab of Sustainable Development of Polar Fisheries
- Ministry of Agriculture and Rural Affairs
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
- Lab for Marine Drugs and Byproducts of Pilot National Lab for Marine Science and Technology
- Qingdao 266071
| | - Zhiqi Cong
- CAS Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of Synthetic Biology
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
- Qingdao
- China
- University of Chinese Academy of Sciences
| |
Collapse
|
36
|
Ramdass AC, Villafana RT, Rampersad SN. Comparative Sequence Analysis of TRI1 of Fusarium. Toxins (Basel) 2019; 11:E689. [PMID: 31771208 PMCID: PMC6950058 DOI: 10.3390/toxins11120689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 12/28/2022] Open
Abstract
Trichothecene mycotoxins are a class of secondary metabolites produced by multiple genera of fungi, including certain plant pathogenic Fusarium species. Functional variation in the TRI1 gene produces a novel Type A trichothecene called NX-2 in strains of F. graminearum. Using a bioinformatics approach, a systematic analysis of 52 translated TRI1 sequences of Fusarium species, including five F. graminearum NX-2 producers and four F. graminearum non-NX-2 producers, was conducted to explain the functional difference of TRI1p of FGNX-2. An assessment of several signature motifs of fungal P450s revealed amino acid substitutions in addition to the post-translational N-X-S/T sequons motif, which is indicative of N-linked glycosylation of this TRI1-encoded protein characteristic of NX-2 producers. There was evidence of selection bias, where TRI1 gene sequences were found to be under positive selection and, therefore, under functional constraints. The cumulative amino acid changes in the TRI1p sequences were reflected in the phylogenetic analyses which revealed species-specific clustering with a distinct separation of FGNX-2 from FG-non-NX-2 producers with high bootstrap support. Together, our findings provide insight into the amino acid sequence features responsible for the functional diversification of this TRI1p.
Collapse
|
37
|
Zhu J, Li G, Wang Q, Zhou Y, Wang J. Engineering Surface Groups of Commercially Activated Carbon for Benzene Hydroxylation to Phenol with Dioxygen. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jie Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Guoqing Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Qian Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yu Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Jun Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| |
Collapse
|
38
|
Herbal preparations for the treatment of hair loss. Arch Dermatol Res 2019; 312:395-406. [PMID: 31680216 DOI: 10.1007/s00403-019-02003-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/27/2019] [Accepted: 10/16/2019] [Indexed: 02/07/2023]
Abstract
Though hair does not serve any crucial physiological function in modern humans, it plays an important role in our self-esteem. Androgenic baldness (androgenic alopecia) and circular/spot baldness (alopecia areata) are the most common forms of hair loss. Many active ingredients of synthetic origin are available for treatment; however, they have a number of limitations. Their effectiveness and safety are questionable and the amount of time needed to achieve the effect is both long and unclear. This has increased interest in finding an alternative approach against hair loss using preparations containing plants and/or their isolated active ingredients. A number of studies (mostly randomized, placebo-controlled) of plants and preparations made of plants have been performed to confirm their effectiveness in treating hair loss. The plants with the most evidence-based effect against alopecia are Curcuma aeruginosa (pink and blue ginger), Serenoa repens (palmetto), Cucurbita pepo (pumpkin), Trifolium pratense (red clover), and Panax ginseng (Chinese red ginseng). The assumed mechanism of action is predominately inhibition of 5α-reductase, with enhanced nutritional support and scalp blood circulation playing a role as well.
Collapse
|
39
|
Ariyasu S, Kodama Y, Kasai C, Cong Z, Stanfield JK, Aiba Y, Watanabe Y, Shoji O. Development of a High‐Pressure Reactor Based on Liquid‐Flow Pressurisation to Facilitate Enzymatic Hydroxylation of Gaseous Alkanes. ChemCatChem 2019. [DOI: 10.1002/cctc.201901323] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shinya Ariyasu
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Yusaku Kodama
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Chie Kasai
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Zhiqi Cong
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Joshua Kyle Stanfield
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Yuichiro Aiba
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
| | - Yoshihito Watanabe
- Research Center for Material ScienceNagoya University Aichi 464-8602 Japan
| | - Osami Shoji
- Department of Chemistry Graduate School of ScienceNagoya University Aichi 464-8602 Japan
- Core Research for Evolutional Science and TechnologyScience and Technology Agency Tokyo 102-0075 Japan
| |
Collapse
|
40
|
Dezvarei S, Shoji O, Watanabe Y, Bell SG. The effect of decoy molecules on the activity of the P450Bm3 holoenzyme and a heme domain peroxygenase variant. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
41
|
Shoji O, Aiba Y, Watanabe Y. Hoodwinking Cytochrome P450BM3 into Hydroxylating Non-Native Substrates by Exploiting Its Substrate Misrecognition. Acc Chem Res 2019; 52:925-934. [PMID: 30888147 DOI: 10.1021/acs.accounts.8b00651] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Bacterial cytochrome P450s (P450s) are at the focus of attention as potential biocatalysts for applications in green synthetic chemistry, as they possess high activity for the hydroxylation of inert substrate C-H bonds. The high activity of bacterial P450s, such as P450BM3, is chiefly due to their high substrate specificity, and consequently, the catalytic activity of P450BM3 toward non-native substrates is very low, limiting the utility of bacterial P450s as biocatalysts. To enable oxidation of non-native substrates by P450BM3 without any mutagenesis, we have developed a series of "decoy molecules", inert dummy substrates, with structures that resemble those of the native substrates. Decoy molecules fool P450BM3 into generating the active species, so-called Compound I, enabling the catalytic oxidation of non-native substrates other than fatty acids. Perfluorinated carboxylic acids (PFCs) serve as decoy molecules to initiate the activation of molecular oxygen in the same manner as long-alkyl-chain fatty acids, due to their structural similarity, and induce the generation of Compound I, but, unlike the native substrates, PFCs are not oxidizable by Compound I, allowing the hydroxylation of non-native substrates, such as gaseous alkanes and benzene. The catalytic activity for non-native substrate hydroxylation was significantly enhanced by employing second generation decoy molecules, PFCs modified with amino acids (PFC-amino acids). Cocrystals of P450BM3 with PFC9-Trp revealed clear electron density in the fatty-acid-binding channel that was readily assigned to PFC9-Trp. The alkyl chain terminus of PFC9-Trp does not reach the active site owing to multiple hydrogen bonding interactions between the carboxyl and carbonyl groups of PFC9-Trp and amino acids located at the entrance of the substrate binding channel of P450BM3 that fix it in place. The remaining space above the heme after binding of PFC9-Trp can be utilized to accommodate non-native substrates. Further developments revealed that third generation decoy molecules, N-acyl amino acids, such as pelargonoyl-l-phenylalanine (C9-Phe), can serve as decoy molecules, indicating that the rationale "fluorination is required for decoy molecule function" can be safely discarded. Diverse carboxylic acids including dipeptides could now be exploited as building blocks, and a library of decoy molecules possessing diverse structures was prepared. Among the third-generation decoy molecules examined N-enanthyl-l-proline modified with l-phenylalanine (C7-Pro-Phe) afforded the maximum turnover rate for benzene hydroxylation. The structural diversity of third-generation decoy molecules was also utilized to control the stereoselectivity of hydroxylation for the benzylic hydroxylation of Indane, showing that decoy molecules can alter stereoselectivity. As both the catalytic activity and enantioselectivity are dependent upon the structure of the decoy molecules, their design allows us to regulate reactions catalyzed by wild-type enzymes. Furthermore, decoy molecules can also activate intracellular P450BM3, allowing the use of E. coli expressing wild-type P450BM3 as an efficient whole-cell bioreactor. It should be noted that Mn-substituted full-length P450BM3 (Mn-P450BM3) is also active for the hydroxylation of propane in which the regioselectivity diverged from that of Fe-P450BM3. The results summarized in this Account represent good examples of how the reactive properties of P450BM3 can be controlled for the monooxygenation of non-native substrates in vitro as well as in vivo to expand the potential of P450BM3.
Collapse
Affiliation(s)
- Osami Shoji
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Yuichiro Aiba
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Yoshihito Watanabe
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| |
Collapse
|
42
|
Xu J, Wang C, Cong Z. Strategies for Substrate-Regulated P450 Catalysis: From Substrate Engineering to Co-catalysis. Chemistry 2019; 25:6853-6863. [PMID: 30698852 DOI: 10.1002/chem.201806383] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 01/29/2019] [Indexed: 01/13/2023]
Abstract
Cytochrome P450 enzymes (P450s) catalyze the monooxygenation of various organic substrates. These enzymes are fascinating and promising biocatalysts for synthetic applications. Despite the impressive abilities of P450s in the oxidation of C-H bonds, their practical applications are restricted by intrinsic drawbacks, such as poor stability, low turnover rates, the need for expensive cofactors (e.g., NAD(P)H), and the narrow scope of useful non-native substrates. These issues may be overcome through the general strategy of protein engineering, which focuses on the improvement of the catalysts themselves. Alternatively, several emerging strategies have been developed that regulate the P450 catalytic process from the viewpoint of the substrate. These strategies include substrate engineering, decoy molecule, and dual-functional small-molecule co-catalysis. Substrate engineering focuses on improving the substrate acceptance and reaction selectivity by means of an anchoring group. The latter two strategies utilize co-substrate-like small molecules that either are proposed to reform the active site, thereby switching the substrate specificity, or directly participate in the catalytic process, thereby creating new catalytic peroxygenation capabilities towards non-native substrates. For at least 10 years, these approaches have played unique roles in solving the problems highlighted above, either alone or in conjunction with protein engineering. Herein, we review three strategies for substrate regulation in the P450-catalyzed oxidation of non-native substrates. Furthermore, we address remaining challenges and potential solutions associated with these approaches.
Collapse
Affiliation(s)
- Jiakun Xu
- Key Laboratory of Sustainable Development of Polar Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of, Fishery Sciences, Qingdao, Shandong, 266071, China
| | - Chunlan Wang
- Key Laboratory of Sustainable Development of Polar Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of, Fishery Sciences, Qingdao, Shandong, 266071, China
| | - Zhiqi Cong
- CAS Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of, Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
| |
Collapse
|
43
|
Abstract
A novel approach for the synthesis of vanillin employing a three-step two-enzymatic cascade sequence is reported. Cytochrome P450 monooxygenases are known to catalyse the selective hydroxylation of aromatic compounds, which is one of the most challenging chemical reactions. A set of rationally designed variants of CYP102A1 (P450 BM3) from Bacillus megaterium at the amino acid positions 47, 51, 87, 328 and 437 was screened for conversion of the substrate 3-methylanisole to vanillyl alcohol via the intermediate product 4-methylguaiacol. Furthermore, a vanillyl alcohol oxidase (VAO) variant (F454Y) was selected as an alternative enzyme for the transformation of one of the intermediate compounds via vanillyl alcohol to vanillin. As a proof of concept, the bi-enzymatic three-step cascade conversion of 3-methylanisole to vanillin was successfully evaluated both in vitro and in vivo.
Collapse
|
44
|
Selective hydroxylation of 1,8- and 1,4-cineole using bacterial P450 variants. Arch Biochem Biophys 2019; 663:54-63. [DOI: 10.1016/j.abb.2018.12.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/24/2018] [Accepted: 12/21/2018] [Indexed: 01/10/2023]
|
45
|
Muthuramalingam S, Anandababu K, Velusamy M, Mayilmurugan R. One step phenol synthesis from benzene catalysed by nickel(ii) complexes. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01471c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nickel(ii)complexes of N4-ligands are reported as efficient catalysts for direct benzene hydroxylation via bis(μ-oxo)dinickel(iii) intermediate species. The exclusive phenol formation is achieved with a yield of 41%.
Collapse
Affiliation(s)
- Sethuraman Muthuramalingam
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
| | - Karunanithi Anandababu
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
| | - Marappan Velusamy
- Department of Chemistry
- North Eastern Hill University
- Shillong-793022
- India
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
| |
Collapse
|
46
|
Zhou H, Wang B, Wang F, Yu X, Ma L, Li A, Reetz MT. Chemo- and Regioselective Dihydroxylation of Benzene to Hydroquinone Enabled by Engineered Cytochrome P450 Monooxygenase. Angew Chem Int Ed Engl 2018; 58:764-768. [PMID: 30511432 DOI: 10.1002/anie.201812093] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/06/2018] [Indexed: 11/10/2022]
Abstract
Hydroquinone (HQ) is produced commercially from benzene by multi-step Hock-type processes with equivalent amounts of acetone as side-product. We describe an efficient biocatalytic alternative using the cytochrome P450-BM3 monooxygenase. Since the wildtype enzyme does not accept benzene, a semi-rational protein engineering strategy was developed. Highly active mutants were obtained which transform benzene in a one-pot sequence first into phenol and then regioselectively into HQ without any overoxidation. A computational study shows that the chemoselective oxidation of phenol by the P450-BM3 variant A82F/A328F leads to the regioselective formation of an epoxide intermediate at the C3=C4 double bond, which departs from the binding pocket and then undergoes fragmentation in aqueous medium with exclusive formation of HQ. As a practical application, an E. coli designer cell system was constructed, which enables the cascade transformation of benzene into the natural product arbutin, which has anti-inflammatory and anti-bacterial activities.
Collapse
Affiliation(s)
- Hangyu Zhou
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, P. R. China
| | - Binju Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 360015, P. R. China
| | - Fei Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, P. R. China
| | - Xiaojuan Yu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, P. R. China
| | - Lixin Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, P. R. China
| | - Aitao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, 430062, P. R. China
| | - Manfred T Reetz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin Airport Economic Area, Tianjin, 300308, China.,Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Muelheim, Germany.,Department of Chemistry, Philipps-University, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
| |
Collapse
|
47
|
Zhou H, Wang B, Wang F, Yu X, Ma L, Li A, Reetz MT. Chemo- and Regioselective Dihydroxylation of Benzene to Hydroquinone Enabled by Engineered Cytochrome P450 Monooxygenase. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812093] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hangyu Zhou
- State Key Laboratory of Biocatalysis and Enzyme Engineering; Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources; Hubei Key Laboratory of Industrial Biotechnology; School of Life Sciences; Hubei University; Wuhan 430062 P. R. China
| | - Binju Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 360015 P. R. China
| | - Fei Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering; Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources; Hubei Key Laboratory of Industrial Biotechnology; School of Life Sciences; Hubei University; Wuhan 430062 P. R. China
| | - Xiaojuan Yu
- State Key Laboratory of Biocatalysis and Enzyme Engineering; Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources; Hubei Key Laboratory of Industrial Biotechnology; School of Life Sciences; Hubei University; Wuhan 430062 P. R. China
| | - Lixin Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering; Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources; Hubei Key Laboratory of Industrial Biotechnology; School of Life Sciences; Hubei University; Wuhan 430062 P. R. China
| | - Aitao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering; Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources; Hubei Key Laboratory of Industrial Biotechnology; School of Life Sciences; Hubei University; Wuhan 430062 P. R. China
| | - Manfred T. Reetz
- Tianjin Institute of Industrial Biotechnology; Chinese Academy of Sciences; 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Muelheim Germany
- Department of Chemistry; Philipps-University; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| |
Collapse
|
48
|
Goto E, Haga Y, Kubo M, Itoh T, Kasai C, Shoji O, Yamamoto K, Matsumura C, Nakano T, Inui H. Metabolic enhancement of 2,3',4,4',5-pentachlorobiphenyl (CB118) using cytochrome P450 monooxygenase isolated from soil bacterium under the presence of perfluorocarboxylic acids (PFCAs) and the structural basis of its metabolism. CHEMOSPHERE 2018; 210:376-383. [PMID: 30015128 DOI: 10.1016/j.chemosphere.2018.07.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
2,3',4,4',5-Pentachlorobiphenyl (CB118) is one of the most abundant polychlorinated biphenyl (PCB) congeners in the environment, and perfluoroalkyl acids, including perfluorocarboxylic acids (PFCAs), are widely distributed in the environment. Although CB118 and perfluoroalkyl acids are present in all humans and biota, effects in the metabolic fate of CB118 leading to toxicity change are unclear. P450BM3, which is isolated from the soil bacterium Bacillus megaterium, metabolized CB118 to three different hydroxylated pentachlorobiphenyls (M1-M3). M2 was identified as 4'-OH-2,3',4,5,5'-pentachlorobiphenyl. These reactions were promoted by the presence of PFCAs, and perfluorooctanoic acid (PFCA-C8) was the most effective for accelerating these reactions among PFCAs with different carbon chain length. The production rate of M2 was accelerated by 25-times using PFCA-C8. Furthermore, the docking models of P450BM3 with CB118 and PFCAs revealed that the conformational changes of the substrate-binding cavity of P450BM3 after binding of PFCAs to P450BM3 were important for selective production of CB118 metabolites. This study leads to the clarification of the different metabolic fates of PCBs under complex contamination with PFCAs.
Collapse
Affiliation(s)
- Erika Goto
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan
| | - Yuki Haga
- Hyogo Prefectural Institute of Environmental Sciences, 3-1-18 Yukihira-cho, Suma-ku, Kobe, Hyogo, 657-0037, Japan
| | - Makoto Kubo
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Toshimasa Itoh
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Chie Kasai
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan
| | - Osami Shoji
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan
| | - Keiko Yamamoto
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Chisato Matsumura
- Hyogo Prefectural Institute of Environmental Sciences, 3-1-18 Yukihira-cho, Suma-ku, Kobe, Hyogo, 657-0037, Japan
| | - Takeshi Nakano
- Research Center for Environmental Preservation, Osaka University, 2-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hideyuki Inui
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan; Biosignal Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan.
| |
Collapse
|
49
|
Catalytic oxidation of benzene to phenol with hydrogen peroxide over Fe-terpyridine complexes supported on a cation exchange resin. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.08.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
50
|
Ye X, Chen Y, Ling C, Ding R, Wang X, Zhang X, Chen S. One-pot synthesis of Schiff base compounds via photocatalytic reaction in the coupled system of aromatic alcohols and nitrobenzene using CdIn 2S 4 photocatalyst. Dalton Trans 2018; 47:10915-10924. [PMID: 30046781 DOI: 10.1039/c8dt02278j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of solar energy to drive organic reactions under mild conditions provides a sustainable pathway for green synthesis and has been one of the primary goals pursued by scientists. In this research, the cadmium indium sulfide (CdIn2S4) photocatalyst was prepared using a simple solvothermal method and was thoroughly characterized using X-ray powder diffraction, UV-visible absorption spectra, nitrogen adsorption-desorption isotherms, scanning electron microscopy, transmission electron microscopy and X-ray spectroscopy measurements. The photocatalytic performance of the CdIn2S4 photocatalyst was evaluated using photocatalytic synthesis of Schiff base compounds in a coupled system of aromatic alcohols and nitrobenzene under visible light irradiation. The yield of N-benzylideneaniline reached up to 32% in the coupled system of benzyl alcohol and nitrobenzene under visible light illumination for 8 h. Furthermore, the changes for the amounts of aromatic aldehydes and AL as intermediate products during the photocatalytic process were also investigated. Using isotopic tracing, a possible reaction mechanism for the photocatalytic synthesis of N-benzylideneaniline and the redox reactions in the coupled system of benzyl alcohol and nitrobenzene was proposed. It is hoped that this strategy can provide an effective pathway for the traditional organic synthesis and transformation using photocatalytic technology under mild conditions.
Collapse
Affiliation(s)
- Xiangju Ye
- College of Chemistry and Materials Engineering, Anhui Science and Technology University, Anhui Bengbu, 233100, PR China.
| | | | | | | | | | | | | |
Collapse
|