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Yu LM, Chen H, Fang W, Cai R, Tao Y, Li Y, Dong H. Recent advances in oxidative dearomatization involving C-H bonds for constructing value-added oxindoles. Org Biomol Chem 2024; 22:7074-7091. [PMID: 39157861 DOI: 10.1039/d4ob00766b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
Exploring three-dimensional chemical space is an important research objective of organic synthetic chemistry. Oxidative dearomatization (ODA) is one of the most important and powerful tools for realizing this goal, because it changes and removes aromatic structures from aromatic compounds to increase levels of saturation and stereoisomerism by direct addition reactions between functional groups with aromatic cores under oxidative conditions. As a hot topic in indole chemistry, the synthetic value of the oxidative dearomatization of indoles has been well recognized and has witnessed rapid development recently, since it could provide convenient and unprecedented access to fabricate high-value-added three-dimensional oxindole skeletons, such as C-quaternary indolones, polycycloindolones and spiroindolones, and be widely applied to the total synthesis of these oxindole alkaloids. Therefore, this article provides a review of recent developments in oxidative dearomatization involving the C-H bonds of indoles. In this article, the features and mechanisms of different types of ODA reactions of indoles are summarized and represented, and asymmetric synthesis methods and their applications are illustrated with examples, and future development trends in this field are predicted at the end.
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Affiliation(s)
- Le-Mao Yu
- College of Chemical & Biological Engineering, Zhejiang University, Hangzhou 310018, China.
- Green Pharmaceuticals and Processes Research Centre, Shaoxing University, Shaoxing, 312000, China
| | - Haojin Chen
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Wenjing Fang
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Ruonan Cai
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Yi Tao
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Yong Li
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Huaping Dong
- Green Pharmaceuticals and Processes Research Centre, Shaoxing University, Shaoxing, 312000, China
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2
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D. V. H, Annadate RA, Pansare SV. Synthesis and Evaluation of N-Diaminophosphoryl Aminothioureas as Bifunctional Catalysts for Vinylogous Aldol Reactions of Isatins and 2(3 H)-Furanones. ACS OMEGA 2023; 8:3190-3197. [PMID: 36713689 PMCID: PMC9878653 DOI: 10.1021/acsomega.2c06637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/23/2022] [Indexed: 06/18/2023]
Abstract
The organocatalytic asymmetric direct vinylogous aldol reaction of N-methylisatins 1 and γ-butenolides 2 to provide 3-hydroxy-2-oxindole derivatives 3 was investigated. A series of N-diaminophosphoryl aminothiourea catalysts 4 was synthesized, and their utility for the stereoselective formation of 3 was examined.
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3
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Heuermann D, Döll S, Schweneker D, Feuerstein U, Gentsch N, von Wirén N. Distinct metabolite classes in root exudates are indicative for field- or hydroponically-grown cover crops. FRONTIERS IN PLANT SCIENCE 2023; 14:1122285. [PMID: 37089658 PMCID: PMC10118039 DOI: 10.3389/fpls.2023.1122285] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/22/2023] [Indexed: 05/03/2023]
Abstract
Introduction Plants release a large variety of metabolites via their roots to shape physico-chemical soil properties and biological processes in the rhizosphere. While hydroponic growth conditions facilitate accessibility of the root system and recovery of root exudates, the natural soil environment can alter root metabolism and exudate secretion, raising the question to what extent the quantity and composition of root exudates released in hydroponic growth systems reflect those recovered from soil-grown roots. Methods Using a root washing method, we sampled root exudates from four field-grown cover crop species with wide taxonomic distance, namely white mustard, lacy phacelia, bristle oat, and Egyptian clover. A set of primary metabolites and secondary metabolites were analysed in a targeted and untargeted LC-MS-based approach, respectively, for comparison with exudates obtained from hydroponically cultured plants. Results and discussion We found that hydroponically cultivated plants released a larger amount of total carbon, but that the recovery of total carbon was not indicative for the diversity of metabolites in root exudates. In the field, root exudates from phacelia and clover contained 2.4 to 3.8 times more secondary metabolites, whereas carbon exudation in hydroponics was 5- to 4-fold higher. The composition of the set of metabolites identified using the untargeted approach was much more distinct among all species and growth conditions than that of quantified primary metabolites. Among secondary metabolite classes, the presence of lipids and lipid-like molecules was highly indicative for field samples, while the release of a large amount of phenylpropanoids, organoheterocyclic compounds or benzenoids was characteristic for clover, mustard or oat, respectively, irrespective of the cultivation condition. However, at the compound level the bulk of released metabolites was specific for cultivation conditions in every species, which implies that hydroponically sampled root exudates poorly reflect the metabolic complexity of root exudates recovered from field-grown plants.
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Affiliation(s)
- Diana Heuermann
- Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research Gatersleben, Seeland, Germany
| | - Stefanie Döll
- Stress and Developmental Biology, Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | - Dörte Schweneker
- Deutsche Saatveredelung Aktiengesellschaft (AG), Asendorf, Germany
| | - Ulf Feuerstein
- Deutsche Saatveredelung Aktiengesellschaft (AG), Asendorf, Germany
| | - Norman Gentsch
- Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germany
| | - Nicolaus von Wirén
- Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research Gatersleben, Seeland, Germany
- *Correspondence: Nicolaus von Wirén,
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Plaszkó T, Szűcs Z, Vasas G, Gonda S. Interactions of fungi with non-isothiocyanate products of the plant glucosinolate pathway: A review on product formation, antifungal activity, mode of action and biotransformation. PHYTOCHEMISTRY 2022; 200:113245. [PMID: 35623473 DOI: 10.1016/j.phytochem.2022.113245] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 05/02/2022] [Accepted: 05/12/2022] [Indexed: 05/05/2023]
Abstract
The glucosinolate pathway, which is present in the order Brassicales, is one of the most researched defensive natural product biosynthesis pathways. Its core molecules, the glucosinolates are broken down upon pathogen challenge or tissue damage to yield an array of natural products that may help plants defend against the stressor. Though the most widely known glucosinolate decomposition products are the antimicrobial isothiocyanates, there is a wide range of other volatile and non-volatile natural products that arise from this biosynthetic pathway. This review summarizes our current knowledge on the interaction of these much less examined, non-isothiocyanate products with fungi. It deals with compounds including (1) glucosinolates and their biosynthesis precursors; (2) glucosinolate-derived nitriles (e.g. derivatives of 1H-indole-3-acetonitrile), thiocyanates, epithionitriles and oxazolidine-2-thiones; (3) putative isothiocyanate downstream products such as raphanusamic acid, 1H-indole-3-methanol (= indole-3-carbinol) and its oligomers, 1H-indol-3-ylmethanamine and ascorbigen; (4) 1H-indole-3-acetonitrile downstream products such as 1H-indole-3-carbaldehyde (indole-3-carboxaldehyde), 1H-indole-3-carboxylic acid and their derivatives; and (5) indole phytoalexins including brassinin, cyclobrassinin and brassilexin. Herein, a literature review on the following aspects is provided: their direct antifungal activity and the proposed mechanisms of antifungal action, increased biosynthesis after fungal challenge, as well as data on their biotransformation/detoxification by fungi, including but not limited to fungal myrosinase activity.
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Affiliation(s)
- Tamás Plaszkó
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary; Doctoral School of Pharmaceutical Sciences, University of Debrecen, 4032, Debrecen, Hungary.
| | - Zsolt Szűcs
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary; Healthcare Industry Institute, University of Debrecen, 4032, Debrecen, Hungary.
| | - Gábor Vasas
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.
| | - Sándor Gonda
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.
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Liu X, Wang Z, Xie R, Tang P, Yuan Q. Design, synthesis and biological evaluation of novel carbamodithioates as anti-proliferative agents against human cancer cells. Eur J Med Chem 2018; 157:1526-1540. [PMID: 30282324 DOI: 10.1016/j.ejmech.2018.07.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/06/2018] [Accepted: 07/15/2018] [Indexed: 11/19/2022]
Abstract
A series of new carbamodithioates compounds has been successfully synthesized. All the carbamodithioate derivatives of SFE and SFA with benzenethiols (substituted or unsubstituted) exhibited, in general, higher percentages of inhibition than their parent compounds: SFE and SFA. A number of carbamodithioate derivatives with benzenethiols (substituted or unsubstituted) (1l, 1m, 1n, 1o, 1q, 1s, 2l, 2n, 2p, 2q, 2r and 2s) were investigated for in vitro anti-proliferative activities against five cancer cell lines: SMMC-7721, A549, A375, HCT 116 and Hela. The carbamodithioate compounds (1l, 1m, 1n, 1o, 1q and 1s) derived from SFE and the carbamodithioate compounds (2l, 2n, 2p, 2q, 2r and 2s) derived from SFA are more sensitive toward SMMC-7721and A549 cancer cells than toward other cancer cells in that their IC50 values are appreciably lower. Moreover, they exhibited stronger inhibitory activities than their parent compound SFE and SFE. Further investigation indicated that these carbamodithioate derivatives inhibited colony formation of SMMC-7721 and remarkably induced the G2/M or G0/G1 phase cell cycle arrest and apoptosis in SMMC-7721 cancer cells. More important, these carbamodithioate derivatives are stable in protic solvent media than their parent compounds. By virtue of the simplicity of the preparation of these carbamodithioate derivatives and their stability, compounds 1m and 2s could be the promising candidates for replacement for their parent SFE and SFA for cancer prevention agents.
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Affiliation(s)
- Xia Liu
- State Key Laboratory of Chemical Resource Engineering, Organic and Medicinal Chemistry Division, College of Life Science and Technology, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, China
| | - Zhijun Wang
- State Key Laboratory of Chemical Resource Engineering, Organic and Medicinal Chemistry Division, College of Life Science and Technology, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, China
| | - Rui Xie
- State Key Laboratory of Chemical Resource Engineering, Organic and Medicinal Chemistry Division, College of Life Science and Technology, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, China
| | - Pingwah Tang
- State Key Laboratory of Chemical Resource Engineering, Organic and Medicinal Chemistry Division, College of Life Science and Technology, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, China.
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering, Organic and Medicinal Chemistry Division, College of Life Science and Technology, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, China.
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Abstract
Covering: July 2012 to June 2015. Previous review: Nat. Prod. Rep., 2013, 30, 869-915The structurally diverse imidazole-, oxazole-, and thiazole-containing secondary metabolites are widely distributed in terrestrial and marine environments, and exhibit extensive pharmacological activities. In this review the latest progress involving the isolation, biological activities, and chemical and biogenetic synthesis studies on these natural products has been summarized.
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Affiliation(s)
- Zhong Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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Pedras MSC, Abdoli A. Pathogen inactivation of cruciferous phytoalexins: detoxification reactions, enzymes and inhibitors. RSC Adv 2017. [DOI: 10.1039/c7ra01574g] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This review covers the detoxification pathways of cruciferous phytoalexins, the corresponding detoxifying enzymes and their natural and synthetic inhibitors. Paldoxins are examined as a potentially sustainable strategy to control plant pathogenic fungi.
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Affiliation(s)
| | - Abbas Abdoli
- Department of Chemistry
- University of Saskatchewan
- Saskatoon
- Canada
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Pedras MSC, Abdoli A. Biotransformation of rutabaga phytoalexins by the fungus Alternaria brassicicola: Unveiling the first hybrid metabolite derived from a phytoalexin and a fungal polyketide. Bioorg Med Chem 2016; 25:557-567. [PMID: 27884513 DOI: 10.1016/j.bmc.2016.11.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/08/2016] [Accepted: 11/11/2016] [Indexed: 11/17/2022]
Abstract
The biotransformations of the rutabaga phytoalexins rutalexin, brassicanate A, isalexin and rapalexin A by the plant pathogenic fungus Alternaria brassicicola are reported. While the biotransformations of rutalexin, brassicanate A, and isalexin are fast, rapalexin A is resistant to fungal transformation. Unexpectedly, biotransformation of rutalexin yields a hybrid metabolite named rutapyrone, derived from rutalexin metabolism and phomapyrone G, a fungal metabolite produced by A. brassicicola. These fungal transformations are detoxification reactions likely carried out by different enzymes. The discovery of rapalexin A resistance to detoxification suggests that this phytoalexin in combination with additional phytoalexins could protect crucifers against this pathogen. Phytoalexins resistant to degradation by A. brassicicola are expected to provide the producing plants with higher disease resistance levels.
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Affiliation(s)
- M Soledade C Pedras
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Abbas Abdoli
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
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9
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Quiroga D, Becerra LD, Sadat-Bernal J, Vargas N, Coy-Barrera E. Synthesis and Antifungal Activity against Fusarium oxysporum of Some Brassinin Analogs Derived from l-tryptophan: A DFT/B3LYP Study on the Reaction Mechanism. Molecules 2016; 21:molecules21101349. [PMID: 27727186 PMCID: PMC6273850 DOI: 10.3390/molecules21101349] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 09/26/2016] [Accepted: 10/08/2016] [Indexed: 11/18/2022] Open
Abstract
An efficient methodology to obtain novel antifungal analogs of brassinin 1 is described. Starting from l-tryptophan 2, N,N′-dialkylthiourea 4, 4-[(1H-indol-3-yl)methylene]-2-sulfanylidene-1,3-thiazolidin-5-one 5 and alkyl (2S)-3-(1H-indol-3-yl)-2-{[(alkylsulfanyl)carbonothioyl]amino}propanoate 6 type compounds were obtained as main products in different ratios depending on the reaction conditions via a tandem dithiocarbamate formation and Michael addition reaction. In order to understand the dependence of the reaction conditions on the mechanism pathway, a DFT/B3LYP study was performed. The results suggested the existence of competitive mechanistic routes which involve the presence of an ionic dithiocarbamate intermediate 9. Antifungal activities of all products were then evaluated against Fusarium oxysporum through mycelial growth inhibition using a microscale amended-medium assay. IC50 values were thus determined for each compound. These results showed that 6-related compounds can be considered as promissory antifungal agents.
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Affiliation(s)
- Diego Quiroga
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 49300, Colombia.
| | - Lili Dahiana Becerra
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 49300, Colombia.
| | - John Sadat-Bernal
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 49300, Colombia.
| | - Nathalia Vargas
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 49300, Colombia.
| | - Ericsson Coy-Barrera
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 49300, Colombia.
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Schlüter T, Ziyaei Halimehjani A, Wachtendorf D, Schmidtmann M, Martens J. Four-Component Reaction for the Synthesis of Dithiocarbamates Starting from Cyclic Imines. ACS COMBINATORIAL SCIENCE 2016; 18:456-60. [PMID: 27362425 DOI: 10.1021/acscombsci.6b00029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient one-pot, four-component reaction for the synthesis of dithiocarbamates using carbon disulfide, cyclic imines, acid chlorides, and commercially available primary or secondary amines has been developed by performing an acid chloride addition to a heterocyclic imine followed by subsequent nucleophilic substitution of in situ generated dithiocarbamic acid. With the aid of the newly developed and powerful multicomponent reaction, a direct route for the synthesis of 24 unknown dithiocarbamates in moderate to good yield under mild conditions is enabled.
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Affiliation(s)
- Torben Schlüter
- Institut
of Chemistry, University of Oldenburg, Carl-von-Ossietzky-Strasse 9−11, 26129 Oldenburg, Germany
| | - Azim Ziyaei Halimehjani
- Faculty
of Chemistry, Kharazmi University, P.O. Box 15719-14911, 49 Mofateh
Street, Tehran 31979-37551, Iran
| | - Daniel Wachtendorf
- Institut
of Chemistry, University of Oldenburg, Carl-von-Ossietzky-Strasse 9−11, 26129 Oldenburg, Germany
| | - Marc Schmidtmann
- Institut
of Chemistry, University of Oldenburg, Carl-von-Ossietzky-Strasse 9−11, 26129 Oldenburg, Germany
| | - Jürgen Martens
- Institut
of Chemistry, University of Oldenburg, Carl-von-Ossietzky-Strasse 9−11, 26129 Oldenburg, Germany
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