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Bulcock BW, Chen R, Lacey E, Chooi YH, Flematti GR. Ether-Diol Ambiguity: An Inconspicuous Issue in the Structure Elucidation of Oxygenated Natural Products. JOURNAL OF NATURAL PRODUCTS 2024; 87:2101-2109. [PMID: 39129216 DOI: 10.1021/acs.jnatprod.4c00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Tertiary and allylic hydroxyl groups readily eliminate water during positive ion mode mass spectrometry and may show similar NMR spectra to their corresponding ethers. In a routine structure elucidation workflow, these factors can cause researchers to incorrectly assign diol moieties as ethers or vice versa, leading to inaccurate chemical structures. After facing this problem during our work on oxygenated sesquiterpenoids from a Fusarium sp. fungal strain, we became aware of this challenging issue. We examined the literature for oxygenated natural products bearing these functional groups, and with the aid of density functional calculations of NMR chemical shifts, we now report the structures of 15 natural products that should be revised. We further establish that derivatizing sub-micromolar amounts of alcohols to their sulfates can be used to distinguish these from their corresponding ethers using liquid chromatography negative ion mode mass spectrometry. Finally, we isolated lignoren/cyclonerodiol from the Fusarium sp. culture extract and supported its revised identity as cyclonerodiol using this sulfation approach. Our results suggest that ether-diol ambiguity could be a prevalent issue affecting the structure elucidation of oxygenated natural products and highlight the importance of using complementary techniques, such as sulfation with LC-(-)-ESI-MS or density functional calculations of NMR chemical shifts.
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Affiliation(s)
- Brodie W Bulcock
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Rachel Chen
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Ernest Lacey
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Yit-Heng Chooi
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Gavin R Flematti
- School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
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2
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Alcántar-Zavala E, Delgado-Vargas F, Marín-González F, Angulo GL, Aguirre-Madrigal HE, Ochoa-Terán A, Rodríguez-Vega G, Aguirre-Hernández G, Montes-Avila J. Design, synthesis, and exploration of antibacterial activity of 6 H-1,2-oxazin-6-ones. RSC Adv 2024; 14:23828-23839. [PMID: 39077316 PMCID: PMC11285021 DOI: 10.1039/d4ra04220d] [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: 06/09/2024] [Accepted: 07/23/2024] [Indexed: 07/31/2024] Open
Abstract
This study reports the in silico design of 30 6H-1,2-oxazin-6-ones against DHFR and PTC antimicrobial targets. Docking compounds 1, 3, 4, 6, and 8 with both enzymes was favorable, outperforming Trimethoprim with DHFR. Therefore, 12 6H-1,2-oxazin-6-ones, including the most promising compounds, were synthesized through an aminolysis reaction of β-cyanoketones with hydroxylamine hydrochloride, obtaining moderate to high yields (55-88%). Subsequently, antibacterial studies were conducted against five bacteria: four Gram-positive MRSA (ATCC 43300 and three clinical isolates) and one Gram-negative (E. coli ATCC 25922). Compounds 1, 2, 3, 4, 6, and 8 inhibited bacterial growth with MIC values ranging from 3.125 to 200 μg mL-1. Compound 1 showed better activity against Gram-positive bacteria than Linezolid. Toxicity assays indicated no adverse effects of the active oxazinones in silico and in vitro. This study demonstrated the antibacterial potential of the selected 6H-1,2-oxazin-6-ones against resistant human pathogenic bacteria.
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Affiliation(s)
- Eleazar Alcántar-Zavala
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
| | - Francisco Delgado-Vargas
- Programa de Posgrado en Ciencias Biomédicas, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
| | - Fabricio Marín-González
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
| | - Gabriela López Angulo
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
| | - Hugo Enrique Aguirre-Madrigal
- Programa de Posgrado en Ciencias Biomédicas, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
| | - Adrián Ochoa-Terán
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana Tijuana 22444 Baja California Mexico
| | - Gibrán Rodríguez-Vega
- Unidad Académica de Ciencias Químico-Biológicas y Farmacéuticas, Universidad Autonóma de Nayarit Tepic 63155 Nayarit Mexico
| | - Gerardo Aguirre-Hernández
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana Tijuana 22444 Baja California Mexico
| | - Julio Montes-Avila
- Programa de Posgrado en Ciencias Biomédicas, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa Culiacán 80010 Sinaloa Mexico
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3
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Reddy RJ, Kumar JJ, Kumari AH. Recent trends in the synthesis and applications of β-iodovinyl sulfones: a decade of progress. Org Biomol Chem 2024; 22:2492-2509. [PMID: 38446020 DOI: 10.1039/d3ob01980b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Direct vicinal difunctionalization of π-systems has emerged as a powerful platform for constructing multiple bonds in a single synthetic operation using simple chemical feedstocks. Over the past decade, there has been exponential growth in the direct construction of successive C-S and C-I bonds using a wide variety of sulfonyl and iodide reactants through 1,2-iodosulfonylation of alkynes in a regio- and stereo-selective manner. In this review, we mainly focus on the recent developments in the preparation of β-iodovinyl sulfones and their practical applications in organic synthesis. The most promising photoredox and electrochemical transformations for synthesizing β-iodovinyl sulfones are also reviewed. The multifunctional β-iodovinyl sulfones have recently been burgeoning as versatile synthetic precursors due to the combination of vinyl iodide and vinyl sulfone moieties, essential building blocks for diverse synthetic manipulations. We hereby present the chemistry of β-iodovinyl sulfones, which can be classified into numerous sections based on the sulfonyl surrogates, and potential synthetic approaches are systematically outlined.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
| | - Jangam Jagadesh Kumar
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
| | - Arram Haritha Kumari
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
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4
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Abdukerem D, Chen H, Mao Z, Xia K, Zhu W, Liu C, Yu Y, Abdukader A. Transition metal-free C(sp 3)-H selenation of β-ketosulfones. Org Biomol Chem 2024; 22:2075-2080. [PMID: 38363158 DOI: 10.1039/d4ob00006d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
The installation of selenium groups has become an essential step across a number of industries such as agrochemicals, drug discovery, and materials. However, direct C(sp3)-H selenation, which is most atom economical, remains a formidable challenge, and only a few examples have been reported to date. In this article, we introduce the transition metal-free C(sp3)-H selenation with the easily available β-ketosulfones and diselenides as the material source. This benign protocol permits access to a broad spectrum of α-aryl(alkyl) seleno-β-ketosulfones in high yields with outstanding functional group compatibility. Distinct advantages of this protocol over all previous methods encompass the utilization of base and air as an oxidant, room temperature, and enhanced green chemistry matrices.
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Affiliation(s)
- Dilshat Abdukerem
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Hui Chen
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Zechuan Mao
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Kun Xia
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Wenli Zhu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Changhong Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Yuming Yu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
| | - Ablimit Abdukader
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
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Yan LH, Li X, Wang BG. Natural products with 1,2-oxazine scaffold: occurrence, chemical diversity, bioactivity, synthesis, and biosynthesis. Nat Prod Rep 2023; 40:1874-1900. [PMID: 37642299 DOI: 10.1039/d3np00023k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Covering: up to the end of July, 20231,2-Oxazine is a heterocyclic scaffold rarely found in natural products and is characterized by a directly connected N-O bond in a six-membered ring. Since the discovery of geneserine, the first 1,2-oxazine-containing natural product (1,2-oxazine NP) being isolated from Calabar bean (Physostigma venenosum) in 1925, a total of 76 naturally occurring 1,2-oxazine NPs have been isolated and identified from various sources, which have attracted the attention of researchers in the field of natural product chemistry, organic synthesis, biosynthesis, and pharmacology. This review summarizes the chemical family of 1,2-oxazine NPs, focusing on their source organisms, structural diversities, chemical synthesis, and biosynthesis.
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Affiliation(s)
- Li-Hong Yan
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
| | - Xin Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China
| | - Bin-Gui Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China
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6
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Nakashima KI, Abe N, Oyama M, Murata H, Inoue M. Sulfur-containing spiroketals from Breynia disticha and evaluations of their anti-inflammatory effect. Beilstein J Org Chem 2023; 19:1604-1614. [PMID: 37915559 PMCID: PMC10616701 DOI: 10.3762/bjoc.19.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/10/2023] [Indexed: 11/03/2023] Open
Abstract
Breynia spp. are a key source of sulfur-containing spiroketal glycosides with potential anti-inflammatory activity. In this study, three new sulfur-containing spiroketals - breynin J (1), epibreynin J (2), and probreynogenin (3) - along with four known compounds - probreynin I (4), phyllaemblic acid (5), breynin B (6), and epibreynin B (7) - were isolated from the roots of Breynia disticha. The structures of compounds 1-7 were elucidated by extensive 1D and 2D NMR spectroscopic analyses, including 1D total correlation spectroscopy (TOCSY), HSQC, HMBC, double quantum-filtered (DQF)-COSY, heteronuclear two-bond correlation (H2BC), and HSQC-TOCSY experiments, as well as high-resolution electrospray ionization HRESIMS analysis, and quantum chemical electronic CD calculations. Furthermore, the absolute configurations of sugar residues were determined by derivatization of the hydrolysates with ʟ-cysteine methyl ester and o-tolyl isothiocyanate followed by HPLC analysis. The anti-inflammatory effects of the isolated compounds were evaluated based on the mRNA levels of proinflammatory cytokines in lipopolysaccharide (LPS)-stimulated RAW 264.7 murine macrophage cells. Compounds 1, 2, 6, and 7 inhibited the increase in interleukin (IL)-1β and IL-6 mRNA levels stimulated by LPS. Moreover, the most potent compound 7 was found to significantly inhibit the production of IL-1β and IL-6 proteins, as revealed by the analysis of culture supernatants.
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Affiliation(s)
- Ken-ichi Nakashima
- Laboratory of Medicinal Resources, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
| | - Naohito Abe
- Laboratory of Pharmacognosy, Department of Bioactive Molecules, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Masayoshi Oyama
- Laboratory of Pharmacognosy, Department of Bioactive Molecules, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Hiroko Murata
- retired, formerly Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Makoto Inoue
- Laboratory of Medicinal Resources, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
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7
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Lerma-Herrera MA, Beiza-Granados L, Ochoa-Zarzosa A, López-Meza JE, Navarro-Santos P, Herrera-Bucio R, Aviña-Verduzco J, García-Gutiérrez HA. Biological Activities of Organic Extracts of the Genus Aristolochia: A Review from 2005 to 2021. Molecules 2022; 27:molecules27123937. [PMID: 35745061 PMCID: PMC9230106 DOI: 10.3390/molecules27123937] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 06/11/2022] [Accepted: 06/12/2022] [Indexed: 02/05/2023] Open
Abstract
Different ethnomedicinal studies have investigated the relationship between various phytochemicals as well as organic extracts and their bioactive aspects. Studies on biological effects are attributed to secondary metabolites such as alkaloids, phenolic compounds, and terpenes. Since there have been no reviews in the literature on the traditional, phytochemical, and ethnomedicinal uses of the genus Aristolochia so far, this article systematically reviews 141 published studies that analyze the associations between secondary metabolites present in organic extracts and their beneficial effects. Most studies found associations between individual secondary metabolites and beneficial effects such as anticancer activity, antibacterial, antioxidant activity, snake anti-venom and anti-inflammatory activity. The aim of this review was to analyze studies carried out in the period 2005-2021 to update the existing knowledge on different species of the genus Aristolochia for ethnomedicinal uses, as well as pharmacological aspects and therapeutic uses.
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Affiliation(s)
- Martín A. Lerma-Herrera
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico; (L.B.-G.); (R.H.-B.); (J.A.-V.)
- Correspondence: (M.A.L.-H.); (H.A.G.-G.)
| | - Lidia Beiza-Granados
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico; (L.B.-G.); (R.H.-B.); (J.A.-V.)
| | - Alejandra Ochoa-Zarzosa
- Centro Multidisciplinario de Estudios en Biotecnología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Michoacana de San Nicolás de Hidalgo, Tarímbaro 58893, Michoacán, Mexico; (A.O.-Z.); (J.E.L.-M.)
| | - Joel E. López-Meza
- Centro Multidisciplinario de Estudios en Biotecnología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Michoacana de San Nicolás de Hidalgo, Tarímbaro 58893, Michoacán, Mexico; (A.O.-Z.); (J.E.L.-M.)
| | - Pedro Navarro-Santos
- CONACYT—Universidad Michoacana de San Nicolás de Hidalgo, Edificio B-1, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico;
| | - Rafael Herrera-Bucio
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico; (L.B.-G.); (R.H.-B.); (J.A.-V.)
| | - Judit Aviña-Verduzco
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico; (L.B.-G.); (R.H.-B.); (J.A.-V.)
| | - Hugo A. García-Gutiérrez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico; (L.B.-G.); (R.H.-B.); (J.A.-V.)
- Correspondence: (M.A.L.-H.); (H.A.G.-G.)
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8
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Lukoyanov AA, Tabolin AA, Nelyubina YV, Ioffe SL, Sukhorukov AY. Deoxygenative Arylation of 5,6-Dihydro-4 H-1,2-oxazine- N-oxides with Arynes. J Org Chem 2022; 87:6838-6851. [PMID: 35523000 DOI: 10.1021/acs.joc.2c00515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six-membered cyclic nitronates (5,6-dihydro-4H-1,2-oxazine-N-oxides) react with Kobayashi's aryne precursors producing 3-(2-hydroxyaryl)-substituted 1,2-oxazines via deoxygenative C-H arylation. The process involves a hitherto unknown 1,3-dipolar cycloaddition of nitronate to the aryne to give an unusual tricyclic nitroso acetal, in which the N-O bond of the isoxazoline ring is selectively cleaved upon the action of a base (CsF) or an acid (TFA). The transient cycloadducts were isolated and characterized in some cases. The synthetic potential of the obtained 3-(2-hydroxyaryl)-substituted 1,2-oxazines was demonstrated by their stereoselective reduction to 1,4-amino alcohols and reductive 1,2-oxazine ring contraction to tetrahydrofuran derivatives.
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Affiliation(s)
- Alexander A Lukoyanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilov strasse 28, Moscow 119991, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
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9
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Yan D, Wang K, Bai S, Liu B, Bai J, Qi X, Hu Y. Flavin-Dependent Monooxygenase-Mediated 1,2-Oxazine Construction via Meisenheimer Rearrangement in the Biosynthesis of Paeciloxazine. J Am Chem Soc 2022; 144:4269-4276. [PMID: 35192348 DOI: 10.1021/jacs.2c00881] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The [1,2]-Meisenheimer rearrangement is well known as the [1,2]-migration of an O-substituted hydroxylamine from a tertiary amine N-oxide, and it is frequently employed in organic synthesis to enforce adjacent carbon oxidation or install a 1,2-oxazine core, which is a prevalent structural feature and pharmacophore of many bioactive natural products. Although the [1,2]-Meisenheimer rearrangement was proposed to occur in the biosynthesis of a number of 1,2-oxazine-containing natural products, it has never been proved biosynthetically. Here, we identified the biosynthetic gene cluster of an insecticidal natural product, paeciloxazine (1), from Penicillium janthinellum and characterized a flavin-dependent monooxygenase, PaxA, as the first example that mediates the formation of a 1,2-oxazine moiety via Meisenheimer rearrangement. In vitro biochemical assays, site-directed mutations, docking and molecular dynamics simulations, and density functional theory calculations support the mechanism that PaxA first catalyzes N-oxidation to form an N-oxide intermediate, which undergoes [1,2]-Meisenheimer rearrangement with the assistance of an amino acid with proton transfer property. This study expands the repertoire of rearrangement reactions during the biosynthesis of natural products and provides a new strategy for discovering natural products with N-O tethers by genome mining.
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Affiliation(s)
- Daojiang Yan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Kunya Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Songlin Bai
- National Institute of Biological Sciences, Beijing 102206, China
| | - Bingyu Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Jian Bai
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Xiangbing Qi
- National Institute of Biological Sciences, Beijing 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 100084, China
| | - Youcai Hu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.,NHC Key Laboratory of Biosynthesis of Natural Products, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.,CAMS Key Laboratory of Enzyme and Catalysis of Natural Drugs, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
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10
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Reddy RJ, Shankar A, Kumar JJ, Sharadha N, Krishna GR. Diethyl phosphite-mediated switchable synthesis of bis(imidazoheterocycles) derived disulfanes and sulfanes using imidazoheterocycles and octasulfur. NEW J CHEM 2022. [DOI: 10.1039/d1nj05226h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique diethyl phosphite-mediated switchable synthesis of bis(imidazoheterocycle)-derived disulfanes and sulfanes using imidazoheterocycles with sulfur is reported. Moreover, imidazo[1,2-a]pyridine-indole derived thioethers were also realized.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Angothu Shankar
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Jangam Jagadesh Kumar
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Nunavath Sharadha
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Gamidi Rama Krishna
- X-ray Crystallography, CSIR-National Chemical Laboratory, Pune 411 008, India
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11
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Fan X, Kong D, He S, Chen J, Jiang Y, Ma Z, Feng J, Yan H. Phenanthrene Derivatives from Asarum heterotropoides Showed Excellent Antibacterial Activity against Phytopathogenic Bacteria. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14520-14529. [PMID: 34813299 DOI: 10.1021/acs.jafc.1c04385] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Asarum heterotropoides extracts showed strong antibacterial activity against selected phytopathogenic bacteria. Bioguided isolation was conducted to obtain 11 phenanthrene derivatives (1-11), 4 phenylpropanoids (12-15), a flavonoid (16), and a steroid (17), including a new phenanthrene derivative (1). In vitro bioassay results showed that phenanthrene derivatives are the main active components of A. heterotropoides extracts. The new compound aristoloxazine C (1) was found to exhibit outstanding antibacterial activity against Ralstonia solanacearum, Xanthomonas oryzae, Erwinia carolovora, Pseudomonas syringae, and Xanthomonas axonopodis, with MIC values of 0.05, 2.5, 2.5, 5, and 6.25 μg/mL, respectively. These values were significantly higher than that of the positive control, streptomycin sulfate. Aristoloxazine C (1) also demonstrated an excellent control effect on tobacco bacterial wilt. Physiological and biochemical experiments combined with electron microscopy showed that the antibacterial activity of aristoloxazine C (1) was primarily related to the destruction of the bacterial cell wall structure. Thus, aristoloxazine C (1) may have the potential to be used as a template for the development of new bactericides or as a probe for the discovery of new antimicrobial targets.
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Affiliation(s)
- Xiaojing Fan
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dan Kong
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
| | - Shan He
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
| | - Junzheng Chen
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yue Jiang
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
| | - Zhiqing Ma
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
| | - Juntao Feng
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
| | - He Yan
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering and Technology Centers of Biopesticide in Shaanxi, Yangling, Shaanxi 712100, China
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12
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Sun FJ, Li M, Gu L, Wang ML, Yang MH. Recent progress on anti-Candida natural products. Chin J Nat Med 2021; 19:561-579. [PMID: 34419257 DOI: 10.1016/s1875-5364(21)60057-2] [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: 04/26/2021] [Indexed: 12/18/2022]
Abstract
Candida is an intractable life-threatening pathogen. Candida infection is extremely difficult to eradicate, and thus is the major cause of morbidity and mortality in immunocompromised individuals. Morevover, the rapid spread of drug-resistant fungi has led to significant decreases in the therapeutic effects of clinical drugs. New anti-Candida agents are urgently needed to solve the complicated medical problem. Natural products with intricate structures have attracted great attention of researchers who make every endeavor to discover leading compounds for antifungal agents. Their novel mechanisms and diverse modes of action expand the variety of fungistatic agents and reduce the emergence of drug resistance. In recent decades, considerable effort has been devoted to finding unique antifungal agents from nature and revealing their unusual mechanisms, which results in important progress on the development of new antifungals, such as the novel cell wall inhibitors YW3548 and SCY-078 which are being tested in clinical trials. This review will present a brief summary on the landscape of anti-Candida natural products within the last decade. We will also discuss in-depth the research progress on diverse natural fungistatic agents along with their novel mechanisms.
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Affiliation(s)
- Fu-Juan Sun
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Min Li
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Liang Gu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Ming-Ling Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
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13
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Jannapu Reddy R, Haritha Kumari A, Kumar JJ. Recent advances in the synthesis and applications of β-keto sulfones: new prospects for the synthesis of β-keto thiosulfones. Org Biomol Chem 2021; 19:3087-3118. [PMID: 33885563 DOI: 10.1039/d1ob00111f] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
This review mainly focuses on recent developments in the preparation of β-keto sulfones and their extensive synthetic applications. New prospects for the synthesis of β-keto thiosulfones have also been highlighted. Over the last decade, there has been exponential growth in the direct construction of β-keto sulfones using a wide variety of keto and sulfonyl precursors. Of note, the most promising photoredox transformations and electrochemical synthesis methods of β-keto sulfones are also presented. Moreover, β-keto sulfones are versatile building blocks in organic synthesis due to their three essential functional groups: sulfonyl, carbonyl, and active methylene moieties. The convenient preparation of β-keto sulfones allows the synthesis of many valuable carbocyclic and heterocyclic compounds, and the effortless removal of the sulfonyl moiety via transformations is supported. The chemistry of β-keto sulfones (2013 to present) can be divided into several sections based on the sulfonyl surrogates, and ubiquitous synthetic strategies were systematically outlined.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
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14
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Zhong YH, Yin-Feng T, Zhou XM, Yan G, Chen GY. Aristolactam derivatives from Fissistigma glaucescens. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2020.104209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Ohta S, Oshimo S, Ohta E, Nehira T, Ômura H, Uy MM, Ishihara Y. Asaroidoxazines from the Roots of Asarum asaroides Induce Apoptosis in Human Neuroblastoma Cells. JOURNAL OF NATURAL PRODUCTS 2020; 83:3050-3057. [PMID: 32955260 DOI: 10.1021/acs.jnatprod.0c00574] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plants in the family Aristolochiaceae contain phenanthrene skeleton-containing chemical constituents that exhibit nephrotoxic, carcinogenic, mutagenic, anti-inflammatory, and cytotoxic effects. Two new phenanthrene-containing 1,2-oxazin-6-ones, designated as asaroidoxazine A (1) and asaroidoxazine B (2), and a known aristolactam, 5-methoxyaristololactam I (3), were isolated from the roots of Asarum asaroides. The structures of compounds 1 and 2 were determined using spectroscopic methods and X-ray crystallography. Treatment of SH-SY5Y human neuroblastoma cells with 1 μM of asaroidoxazine A (1) induced nuclear condensation as well as caspase-3/7 activation, indicating that this compound is a strong apoptosis inducer in neuronal cells. This is the first report of apoptosis induction by phenanthrene-containing oxazines.
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Affiliation(s)
- Shinji Ohta
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Shiori Oshimo
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Emi Ohta
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Hisashi Ômura
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Mylene M Uy
- Department of Chemistry, Mindanao State University-Iligan Institute of Technology, Iligan City 9200, Philippines
| | - Yasuhiro Ishihara
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
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16
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Wang S, Li C, Liu Y, Mallikarjuna Reddy D, Sidick Basha R, Park JK, Lee S, Lee C. Palladium‐Catalyzed Decarbonylative Thioetherification of 2‐Pyridyl Thioesters. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shih‐Fang Wang
- Department of Chemistry National Chung Hsing University, Taichung Taiwan 402 R.O.C
| | - Chao‐En Li
- Department of Chemistry National Chung Hsing University, Taichung Taiwan 402 R.O.C
| | - You‐Chen Liu
- Department of Chemistry National Chung Hsing University, Taichung Taiwan 402 R.O.C
| | | | - R. Sidick Basha
- Department of Chemistry National Chung Hsing University, Taichung Taiwan 402 R.O.C
| | - Jin Kyu Park
- Department of Chemistry Chonnam National University Gwangju 61186 Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry Chonnam National University Gwangju 61186 Republic of Korea
| | - Chin‐Fa Lee
- Department of Chemistry National Chung Hsing University, Taichung Taiwan 402 R.O.C
- Center for Advanced Science and Technology (iCAST) National Chung Hsing University Taichung Taiwan (R.O.C.) 402
- Innovation and Development Center of Sustainable Agriculture (IDCSA) National Chung Hsing University Taichung Taiwan (R.O.C.) 402
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17
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Lautié E, Russo O, Ducrot P, Boutin JA. Unraveling Plant Natural Chemical Diversity for Drug Discovery Purposes. Front Pharmacol 2020; 11:397. [PMID: 32317969 PMCID: PMC7154113 DOI: 10.3389/fphar.2020.00397] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/16/2020] [Indexed: 12/11/2022] Open
Abstract
The screening and testing of extracts against a variety of pharmacological targets in order to benefit from the immense natural chemical diversity is a concern in many laboratories worldwide. And several successes have been recorded in finding new actives in natural products, some of which have become new drugs or new sources of inspiration for drugs. But in view of the vast amount of research on the subject, it is surprising that not more drug candidates were found. In our view, it is fundamental to reflect upon the approaches of such drug discovery programs and the technical processes that are used, along with their inherent difficulties and biases. Based on an extensive survey of recent publications, we discuss the origin and the variety of natural chemical diversity as well as the strategies to having the potential to embrace this diversity. It seemed to us that some of the difficulties of the area could be related with the technical approaches that are used, so the present review begins with synthetizing some of the more used discovery strategies, exemplifying some key points, in order to address some of their limitations. It appears that one of the challenges of natural product-based drug discovery programs should be an easier access to renewable sources of plant-derived products. Maximizing the use of the data together with the exploration of chemical diversity while working on reasonable supply of natural product-based entities could be a way to answer this challenge. We suggested alternative ways to access and explore part of this chemical diversity with in vitro cultures. We also reinforced how important it was organizing and making available this worldwide knowledge in an "inventory" of natural products and their sources. And finally, we focused on strategies based on synthetic biology and syntheses that allow reaching industrial scale supply. Approaches based on the opportunities lying in untapped natural plant chemical diversity are also considered.
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Affiliation(s)
- Emmanuelle Lautié
- Centro de Valorização de Compostos Bioativos da Amazônia (CVACBA)-Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, Brazil
| | - Olivier Russo
- Institut de Recherches Internationales SERVIER, Suresnes, France
| | - Pierre Ducrot
- Molecular Modelling Department, 'PEX Biotechnologie, Chimie & Biologie, Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Jean A Boutin
- Institut de Recherches Internationales SERVIER, Suresnes, France
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18
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Chen HL, Zhao WT, Liu QP, Chen HY, Zhao W, Yang DF, Yang XL. (±)-Preisomide: A new alkaloid featuring a rare naturally occurring tetrahydro-2H-1,2-oxazin skeleton from an endophytic fungus Preussia isomera by using OSMAC strategy. Fitoterapia 2020; 141:104475. [DOI: 10.1016/j.fitote.2020.104475] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 12/20/2022]
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19
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Yavari I, Shaabanzadeh S. Electrochemical Synthesis of β-Ketosulfones from Switchable Starting Materials. Org Lett 2020; 22:464-467. [PMID: 31910023 DOI: 10.1021/acs.orglett.9b04221] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A synthesis of β-ketosulfones via sulfination of aryl methyl ketones and aryl acetylenes with sodium sulfinates under mild electrochemical conditions, in moderate to good chemical yields, is described. In particular, an electrochemical sulfination reaction of alkynes with sulfinate salts has never been explored. An environmentally friendly characteristic of this reaction is that it uses electricity as a valuable energy source for electrochemical synthesis of β-ketosulfones. This strategy is more convenient and practical compared to previous approaches.
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Affiliation(s)
- Issa Yavari
- Department of Chemistry , Tarbiat Modares University , P.O. Box 14115-175, Tehran 14117-13116 , Iran
| | - Sina Shaabanzadeh
- Department of Chemistry , Tarbiat Modares University , P.O. Box 14115-175, Tehran 14117-13116 , Iran
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20
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Reddy RJ, Kumar JJ, Kumari AH. Unprecedented Reactivity of β-Iodovinyl Sulfones: An Efficient Synthesis of β-Keto Sulfones and β-Keto Thiosulfones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900676] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry; University College of Science; Osmania University; Hyderabad 500 007 India
| | - Jangam Jagadesh Kumar
- Department of Chemistry; University College of Science; Osmania University; Hyderabad 500 007 India
| | - Arram Haritha Kumari
- Department of Chemistry; University College of Science; Osmania University; Hyderabad 500 007 India
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21
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Hu B, Zhou P, Zhang Q, Wang Y, Zhao S, Lu L, Yan S, Yu F. Metal-Free Oxidative Thioesterification of Methyl Ketones with Thiols/Disulfides for the Synthesis of α-Ketothioesters. J Org Chem 2018; 83:14978-14986. [PMID: 30468069 DOI: 10.1021/acs.joc.8b02235] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A direct Csp3-H bond oxidative thioesterification of methyl ketones with aromatic thiols/disulfides promoted by TBAI/K2S2O8 has been developed. The reaction provides successfully a simple and efficient method for the synthesis of functionalized α-ketothioesters of aromatic thiols. This practical methodology exhibits readily available starting materials, large-scale applicability, synthetic application, and broad functional group tolerance. A possible mechanism for the transformation is proposed.
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Affiliation(s)
- Biao Hu
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Pan Zhou
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Qiaohe Zhang
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Yanqin Wang
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Siyun Zhao
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Lingling Lu
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
| | - Shengjiao Yan
- School of Chemical Science and Technology , Yunnan University , Kunming 650091 , People's Republic of China
| | - Fuchao Yu
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , People's Republic of China
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22
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Hu B, Zhang Q, Zhao S, Wang Y, Xu L, Yan S, Yu F. Direct Oxidative Disulfenylation/Cyclization of 2′‐Hydroxyacetophenones with Thiophenols for the Synthesis of 2,2‐Dithio‐Benzofuran‐3(2
H
)‐Ones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801138] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Biao Hu
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Qiaohe Zhang
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Siyun Zhao
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Yanqin Wang
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Li Xu
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Shengjiao Yan
- School of Chemical Science and TechnologyYunnan University Kunming 650091 People's Republic of China
| | - Fuchao Yu
- Faculty of Life Science and TechnologyKunming University of Science and Technology Kunming 650500 People's Republic of China
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