1
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Li XP, Shen WH, Zhou LL, Huang QY, Cong RP, Zheng LP, Wang JW. Lipopolysaccharides from a Shiraia fruiting body-associated bacterium elicit host fungal hypocrellin A biosynthesis through nitric oxide generation. Carbohydr Polym 2024; 324:121498. [PMID: 37985049 DOI: 10.1016/j.carbpol.2023.121498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/30/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023]
Abstract
Hypocrellin A (HA) is an excellent perylenequinone photosensitizer from Shiraia fruiting bodies. A dominant bacterium Pseudomonas fulva SB1 in the fruiting body was found to promote HA biosynthesis. The bacterial LPS were purified and the O-specific polysaccharide (OPS) consisted of rhamnose (Rha), galactose (Gal) and N-acetyl-galactosamine (GalNAc) with an average molecular weight of 282.8 kDa. Although the OPS composing of Rhap and Galp backbone showed elicitation capability on fungal HA accumulation, the highest HA production (303.76 mg/L) was achieved by LPS treatment at 20 μg/mL on day 3 of the mycelium culture. The generation of nitric oxide (NO) in Shiraia mycelia was triggered by LPS, which was partially blocked by inhibitors of nitric oxide synthase (NOS) and nitrate reductase (NR), leading to the depressed HA production. Transcriptome analysis revealed that NO mediated LPS-induced HA production via upregulating the expressions of critical genes associated with central carbon metabolism and downstream HA biosynthesis genes. This is the first report of LPS-induced NO to regulate fungal secondary metabolite production, which provides new insights on the role of bacterial LPS in bacterium-fungus interactions and an effective strategy to enhance hypocrellin production.
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Affiliation(s)
- Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Lu Lu Zhou
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Qun Yan Huang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Rui Peng Cong
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Li Ping Zheng
- Department of Horticultural Sciences, Soochow University, Suzhou 215123, China.
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
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2
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Xu R, Huang QY, Shen WH, Li XP, Zheng LP, Wang JW. Volatiles of Shiraia fruiting body-associated Pseudomonas putida No.24 stimulate fungal hypocrellin production. Synth Syst Biotechnol 2023; 8:427-436. [PMID: 37409170 PMCID: PMC10319174 DOI: 10.1016/j.synbio.2023.06.004] [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: 04/22/2023] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 07/07/2023] Open
Abstract
Hypocrellins are major bioactive perylenequinones from Shiraia fruiting bodies and have been developed as efficient photosensitizers for photodynamic therapy. Pseudomonas is the second dominant genus inside Shiraia fruiting bodies, but with less known actions on the host fungus. In this work, the effects of bacterial volatiles from the Shiraia-associated Pseudomonas on fungal hypocrellin production were investigated. Pseudomonas putida No.24 was the most active to promote significantly accumulation of Shiraia perylenequinones including hypocrellin A (HA), HC, elsinochrome A (EA) and EC. Headspace analysis of the emitted volatiles revealed dimethyl disulfide as one of active compounds to promote fungal hypocrellin production. The bacterial volatiles induced an apoptosis in Shiraia hyphal cell, which was associated with the generation of reactive oxygen species (ROS). ROS generation was proved to mediate the volatile-induced membrane permeability and up-regulation of gene expressions for hypocrellin biosynthesis. In the submerged volatile co-culture, the bacterial volatiles stimulated not only HA content in mycelia, but also HA secretion into the medium, leading to the enhanced HA production to 249.85 mg/L, about 2.07-fold over the control. This is the first report on the regulation of Pseudomonas volatiles on fungal perylenequinone production. These findings could be helpful to understand the roles of bacterial volatiles in fruiting bodies and also provide new elicitation method using bacterial volatiles to stimulate fungal secondary metabolite production.
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Affiliation(s)
- Rui Xu
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Qun Yan Huang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Li Ping Zheng
- Department of Horticultural Sciences, Soochow University, Suzhou, 215123, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
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3
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Shen WH, Cong RP, Li XP, Huang QY, Zheng LP, Wang JW. Effects of branched-chain amino acids on Shiraia perylenequinone production in mycelium cultures. Microb Cell Fact 2023; 22:57. [PMID: 36964527 PMCID: PMC10039612 DOI: 10.1186/s12934-023-02066-6] [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: 01/04/2023] [Accepted: 03/21/2023] [Indexed: 03/26/2023] Open
Abstract
BACKGROUND Perylenequinones from Shiraia fruiting bodies are excellent photosensitizers and widely used for anti-cancer photodynamic therapy (PDT). The lower yield of Shiraia perylenequinones becomes a significant bottleneck for their medical application. Branched-chain amino acids (BCAAs) not only serve as important precursors for protein synthesis, but also are involved in signaling pathway in cell growth and development. However, there are few reports concerning their regulation of fungal secondary metabolism. In present study, the eliciting effects of BCAAs including L-isoleucine (L-Ile), L-leucine (L-Leu) and L-valine (L-Val) on Shiraia perylenequinone production were investigated. RESULTS Based on the analysis of the transcriptome and amino acid contents of Shiraia in the production medium, we revealed the involvement of BCAAs in perylenequinone biosynthesis. The fungal conidiation was promoted by L-Val treatment at 1.5 g/L, but inhibited by L-Leu. The spore germination was promoted by both. The production of fungal perylenequinones including hypocrellins A (HA), HC and elsinochromes A-C (EA-EC) was stimulated significantly by L-Val at 1.5 g/L, but sharply suppressed by L-Leu. After L-Val treatment (1.5 g/L) in Shiraia mycelium cultures, HA, one of the main bioactive perylenequinones reached highest production 237.92 mg/L, about 2.12-fold than that of the control. Simultaneously, we found that the expression levels of key genes involved in the central carbon metabolism and in the late steps for perylenequinone biosynthesis were up-regulated significantly by L-Val, but most of them were down-regulated by L-Leu. CONCLUSIONS Our transcriptome analysis demonstrated that BCAA metabolism was involved in Shiraia perylenequinone biosynthesis. Exogenous BCAAs exhibit contrasting effects on Shiraia growth and perylenequinones production. L-Val could promote perylenequinone biosynthesis via not only enhancing the central carbon metabolism for more precursors, but also eliciting perylenequinone biosynthetic gene expressions. This is the first report on the regulation of BCAAs on fungal perylenequinone production. These findings provided a basis for understanding physiological roles of BCAAs and a new avenue for increasing perylenequinone production in Shiraia mycelium cultures.
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Affiliation(s)
- Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Rui Peng Cong
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Qun Yan Huang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Li Ping Zheng
- Department of Horticultural Sciences, Soochow University, Suzhou, 215123, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.
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4
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Zhou LL, Shen WH, Ma YJ, Li XP, Wu JY, Wang JW. Structure characterization of an exopolysaccharide from a Shiraia-associated bacterium and its strong eliciting activity on the fungal hypocrellin production. Int J Biol Macromol 2023; 226:423-433. [PMID: 36473526 DOI: 10.1016/j.ijbiomac.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/07/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Hypocrellins are fungal perylenequinones (PQs) from Shiraia fruiting bodies and potential photosensitizers for cancer photodynamic therapy. Shiraia fruiting bodies harbor diverse bacterial communities dominated by Pseudomonas. The present study was to characterize the exopolysaccharide (EPS) of P. fulva SB1 which acted as an elicitor to stimulate the PQ accumulation of the host Shiraia. A bacterial EPS named EPS-1 was purified from the culture broth of P. fulva SB1, which consisted of mannose (Man) and glucose (Glc) with an average molecular weight of 9.213 × 104 Da. EPS-1 had (1 → 2)-linked α-mannopyranose (Manp) backbone and side chains of α-D-Manp-(1→ and α-D-Manp-(1 → 6)-β-D-Glcp-(1 → 6)-α-D-Manp(1 → group attached to the O-6 positions of (1 → 2)-α-D-Manp. EPS-1 at 30 mg/L stimulated both intracellular and extracellular hypocrellin A (HA) by about 3-fold of the control group. The EPS-1 treatment up-regulated the expression of key genes for HA biosynthesis. The elicitation of HA biosynthesis by EPS-1 was strongly dependent on the induced reactive oxygen species (ROS) generation. The results may provide new insights on the role of bacterial EPS in bacterium-fungus interactions and effective elicitation strategy for hypocrellin production in mycelial cultures.
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Affiliation(s)
- Lu Lu Zhou
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Jian-Yong Wu
- Research Institute for Future Food, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
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5
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Li XP, Ji HY, Wang WJ, Shen WH, Wang JW. Effects of Blue Light on Hypocrellin A Production in Shiraia Mycelium Cultures. Photochem Photobiol 2022; 98:1343-1354. [PMID: 35506756 DOI: 10.1111/php.13640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/01/2022] [Indexed: 11/30/2022]
Abstract
Blue light is a crucial environmental cue for fungi. Hypocrellin A (HA) is a photoactive perylenequinone from Shiraia with strong antimicrobial and anticancer properties. In this study, effects of the illumination of blue light-emitting diode (LED) at 470 nm on Shiraia sp. S8 was investigated. Blue light at 50-200 lx and 4-6 h/day could enhance HA content in the mycelia, but suppress it at 300-400 lx or with longer exposure (8-24 h/day). The intermittent blue light (6 h/day) at 200 lx not only enhanced the fungal conidiation, but stimulated HA production without any growth retardation. The generation of fungal reactive oxygen species (ROS) was induced to up-regulate HA biosynthetic gene expressions. When the culture was maintained under the intermittent blue light for 8 days, HA production reached 242.76 mg/L, 2.27-fold of the dark control. On the other hand, both the degradation of HA and down-regulation of HA biosynthetic genes occurred under long exposure time (8-24 h/day), leading to the suppression of HA production. These results provide a basis for understanding the regulation of blue light on the biosynthesis of fungal photoactivated perylenequinones, and the application of a novel light elicitation to Shiraia mycelium cultures for enhanced HA production.
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Affiliation(s)
- Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Hong Yao Ji
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Juan Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
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6
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Ren X, Tian B, Wang L, Tan Y, Huang Y, Jiang X, Liu Y. Metabolomics integrated with transcriptomics reveals the changes during developmental stages in Shiraia bambusicola. J Basic Microbiol 2022; 62:721-739. [PMID: 35289436 DOI: 10.1002/jobm.202200008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/08/2022] [Accepted: 02/12/2022] [Indexed: 11/09/2022]
Abstract
Shiraia bambusicola is a fungus with high economic value widely used in medicine, agriculture, and food. We wished to understand the genes and metabolites changes involved in the different developmental stages of S. bambusicola. So, to reveal key genes and metabolites in the main active metabolite, the were analyzed in different developmental stages of S. bambusicola fruiting body. A total of 29,137 Unigenes were annotated. In the whole growth process, differentially expressed genes were involved in the pathways of cytochrome P450, transcription factors, transporters, and so on, while in the early stage of growth, genes enriching to synthesis pathways of basic substances. In the middle stage of growth, genes with more prominent changes were involved in the pathways of the cell cycle, cancer mechanisms, and aminobenzoate degradation; in the later stage of growth, differentially expressed genes that enriched synthesis pathways of secondary metabolites. A total of 612 metabolites were detected from different growth stages of S. bambusicola. Among them, coumarins, alkaloids, rutin, liquiritigenin, quercetin, and other medically relevant metabolites were detected for the first time. We have identified 31 secondary metabolites, relevantly only accumulated in the early and middle stage, but not detected in the later stage, such as flavonols, coumarins, nucleotides and its derivates and hydroxycinnamoyl derivatives. The differential genes and metabolites of the same group were enriched in 127 pathways, and more significantly in ubiquinone and other terpenoid quinone biosynthesis, phenylalanine metabolism, phenylalanine, tyrosine and tryptophan biosynthesis, and phenylpropanoid biosynthesis. The correlation networks of several significantly enriched pathways were analyzed, and the relationships within and between these pathways, genes, and metabolites, were analyzed. The synthetic pathway of hypocrellin has been speculated upon. We believe that hypocrellin is synthesized in S. bambusicola via the shikimic acid pathway followed by phenylalanine, tyrosine, and tryptophan biosynthesis pathway, then the ubiquinone and other terpenoid quinone biosynthesis pathway, and finally a series of polymerization and modification reactions. Several genes and metabolites involved in the biosynthesis of hypocrellin have been identified. This study provides a reference for further research on S. bambusicola, by providing a basis for its use and development.
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Affiliation(s)
- Xiyi Ren
- College of Agriculture, Guizhou University, Guiyang, Guizhou, China.,Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China.,Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, Guizhou, China
| | - Bing Tian
- Animal Epidemic Disease Prevention and Control Monitoring Station of Zunyi, Zunyi, Guizhou, China
| | - Luo Wang
- Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China.,Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, Guizhou, China
| | - Yumei Tan
- Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China.,Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, Guizhou, China
| | - Yonghui Huang
- Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China.,Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, Guizhou, China
| | - Xuanli Jiang
- College of Agriculture, Guizhou University, Guiyang, Guizhou, China
| | - Yongxiang Liu
- Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China.,Guizhou Key Laboratory of Agricultural Biotechnology, Guiyang, Guizhou, China
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7
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Al Subeh Z, Waldbusser AL, Raja HA, Pearce CJ, Ho KL, Hall MJ, Probert MR, Oberlies NH, Hematian S. Structural Diversity of Perylenequinones Is Driven by Their Redox Behavior. J Org Chem 2022; 87:2697-2710. [PMID: 35077640 PMCID: PMC8898278 DOI: 10.1021/acs.joc.1c02639] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Indexed: 01/16/2023]
Abstract
Hypocrellins and hypomycins are two subclasses of fungal perylenequinones with unique structural, biological, and photochemical properties. With the growing interest in these naturally occurring photosensitizers, more studies were warranted to better understand the structural relationships between these two subclasses of perylenequinones. In this study, the long-postulated biosynthetic precursor (7) of class B fungal perylenequinones was isolated and characterized from a Shiraia-like sp. (strain MSX60519). Furthermore, the electrochemical and chemical redox behaviors of hypocrellins and hypomycins were investigated under aerobic and anaerobic conditions. These studies served to define the structural relationship within hypocrellins (1-3), which was further supported by X-ray crystallography, and between hypocrellins and hypomycins (4-6). Chemical reductions of hypocrellins under anaerobic conditions identified the origin of hypomycin A (4), hypomycin C (5), and hypomycin E (6), which in turn served to confirm 4 and revise the absolute configurations of 5 and 6. Hypocrellins were shown to undergo reversible reduction and reoxidation under aerobic conditions, while in an anaerobic environment and longer time scale, the fully reduced form can, to some extent, undergo an intramolecular ring closing metathesis. This may impart a means of reductive pathway for self-protection against these phototoxins and explain the chemical diversity observed in the fungal metabolites.
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Affiliation(s)
- Zeinab
Y. Al Subeh
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Amy L. Waldbusser
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Huzefa A. Raja
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Cedric J. Pearce
- Mycosynthetix,
Inc., Hillsborough, North Carolina 27278, United States
| | - Kin Lok Ho
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne, NE1 7RU, United
Kingdom
| | - Michael J. Hall
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne, NE1 7RU, United
Kingdom
| | - Michael R. Probert
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne, NE1 7RU, United
Kingdom
| | - Nicholas H. Oberlies
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Shabnam Hematian
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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8
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Al Subeh ZY, Waldbusser AL, Raja HA, Pearce CJ, Ho KL, Hall MJ, Probert MR, Oberlies NH, Hematian S. Structural Diversity of Perylenequinones Is Driven by Their Redox Behavior. J Org Chem 2022. [PMID: 35077640 DOI: 10.1021/acs.joc.1c0263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Hypocrellins and hypomycins are two subclasses of fungal perylenequinones with unique structural, biological, and photochemical properties. With the growing interest in these naturally occurring photosensitizers, more studies were warranted to better understand the structural relationships between these two subclasses of perylenequinones. In this study, the long-postulated biosynthetic precursor (7) of class B fungal perylenequinones was isolated and characterized from a Shiraia-like sp. (strain MSX60519). Furthermore, the electrochemical and chemical redox behaviors of hypocrellins and hypomycins were investigated under aerobic and anaerobic conditions. These studies served to define the structural relationship within hypocrellins (1-3), which was further supported by X-ray crystallography, and between hypocrellins and hypomycins (4-6). Chemical reductions of hypocrellins under anaerobic conditions identified the origin of hypomycin A (4), hypomycin C (5), and hypomycin E (6), which in turn served to confirm 4 and revise the absolute configurations of 5 and 6. Hypocrellins were shown to undergo reversible reduction and reoxidation under aerobic conditions, while in an anaerobic environment and longer time scale, the fully reduced form can, to some extent, undergo an intramolecular ring closing metathesis. This may impart a means of reductive pathway for self-protection against these phototoxins and explain the chemical diversity observed in the fungal metabolites.
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Affiliation(s)
- Zeinab Y Al Subeh
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Amy L Waldbusser
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Cedric J Pearce
- Mycosynthetix, Inc., Hillsborough, North Carolina 27278, United States
| | - Kin Lok Ho
- Chemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - Michael J Hall
- Chemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - Michael R Probert
- Chemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Shabnam Hematian
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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9
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He C, Chen X, Zhuang S, Wu Y, Tang B, Wu A. Palladium‐Catalyzed Heck/Insertion/Decarboxylation Domino Sequence: Synthesis of Dihydrocyclohepta[
de
]naphthalenes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Cai He
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Xiang‐Long Chen
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Shi‐Yi Zhuang
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Yan‐Dong Wu
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Bo‐Cheng Tang
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - An‐Xin Wu
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
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10
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Ma YJ, Li XP, Wang Y, Wang JW. Nitric oxide donor sodium nitroprusside-induced transcriptional changes and hypocrellin biosynthesis of Shiraia sp. S9. Microb Cell Fact 2021; 20:92. [PMID: 33910564 PMCID: PMC8082767 DOI: 10.1186/s12934-021-01581-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/17/2021] [Indexed: 12/22/2022] Open
Abstract
Background Nitric oxide (NO) is a ubiquitous signaling mediator in various physiological processes. However, there are less reports concerning the effects of NO on fungal secondary metabolites. Hypocrellins are effective anticancer photodynamic therapy (PDT) agents from fungal perylenequinone pigments of Shiraia. NO donor sodium nitroprusside (SNP) was used as a chemical elicitor to promote hypocrellin biosynthesis in Shiraia mycelium cultures. Results SNP application at 0.01–0.20 mM was found to stimulate significantly fungal production of perylenequinones including hypocrellin A (HA) and elsinochrome A (EA). SNP application could not only enhance HA content by 178.96% in mycelia, but also stimulate its efflux to the medium. After 4 days of SNP application at 0.02 mM, the highest total production (110.34 mg/L) of HA was achieved without any growth suppression. SNP released NO in mycelia and acted as a pro-oxidant, thereby up-regulating the gene expression and activity of reactive oxygen species (ROS) generating NADPH oxidase (NOX) and antioxidant enzymes, leading to the increased levels of superoxide anion (O2−) and hydrogen peroxide (H2O2). Gene ontology (GO) analysis revealed that SNP treatment could up-regulate biosynthetic genes for hypocrellins and activate the transporter protein major facilitator superfamily (MFS) for the exudation. Moreover, SNP treatment increased the proportion of total unsaturated fatty acids in the hypha membranes and enhanced membrane permeability. Our results indicated both cellular biosynthesis of HA and its secretion could contribute to HA production induced by SNP. Conclusions The results of this study provide a valuable strategy for large-scale hypocrellin production and can facilitate further understanding and exploration of NO signaling in the biosynthesis of the important fungal metabolites. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01581-8.
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Affiliation(s)
- Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.,College of Life Sciences, Northwest Normal University, Lanzhou, 730000, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Yue Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.
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11
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Butsch K, Haseloer A, Schmitz S, Ott I, Schur J, Klein A. Fe III, Cu II and Zn II Complexes of the Rigid 9-Oxido-phenalenone Ligand-Spectroscopy, Electrochemistry, and Cytotoxic Properties. Int J Mol Sci 2021; 22:3976. [PMID: 33921452 PMCID: PMC8070161 DOI: 10.3390/ijms22083976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/07/2021] [Accepted: 04/07/2021] [Indexed: 01/10/2023] Open
Abstract
The three complexes [Fe(opo)3], [Cu(opo)2], and [Zn(opo)2] containing the non-innocent anionic ligand opo- (opo- = 9-oxido-phenalenone, Hopo = 9-hydroxyphenalonone) were synthesised from the corresponding acetylacetonates. [Zn(opo)2] was characterised using 1H nuclear magnetic resonance (NMR) spectroscopy, the paramagnetic [Fe(opo)3] and [Cu(opo)2] by electron paramagnetic resonance (EPR) spectroscopy. While the EPR spectra of [Cu(opo)2] and [Cu(acac)2] in dimethylformamide (DMF) solution are very similar, a rather narrow spectrum was observed for [Fe(opo)3] in tetrahydrofuran (THF) solution in contrast to the very broad spectrum of [Fe(acac)3] in THF (Hacac = acetylacetone, 2,4-pentanedione; acac- = acetylacetonate). The narrow, completely isotropic signal of [Fe(opo)3] disagrees with a metal-centred S = 5/2 spin system that is observed in the solid state. We assume spin-delocalisation to the opo ligand in the sense of an opo- to FeIII electron transfer. All compounds show several electrochemical opo-centred reduction waves in the range of -1 to -3 V vs. the ferrocene/ferrocenium couple. However, for CuII and FeIII the very first one-electron reductions are metal-centred. Electronic absorption in the UV to vis range are due to π-π* transitions in the opo core, giving Hopo and [Zn(opo)2] a yellow to orange colour. The structured bands ranging from 400 to 500 for all compounds are assigned to the lowest energy π-π* transitions. They show markedly higher intensities and slight shifts for the CuII (brown) and FeIII (red) complexes and we assume admixing metal contributions (MLCT for CuII, LMCT for FeIII). For both complexes long-wavelength absorptions assignable to d-d transitions were detected. Detailed spectroelectrochemical experiments confirm both the electrochemical and the optical assignments. Hopo and the complexes [Cu(opo)2], [Zn(opo)2], and [Fe(opo)3] show antiproliferative activities against HT-29 (colon cancer) and MCF-7 (breast cancer) cell lines in the range of a few µM, comparable to cisplatin under the same conditions.
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Affiliation(s)
- Katharina Butsch
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany; (K.B.); (A.H.); (S.S.)
| | - Alexander Haseloer
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany; (K.B.); (A.H.); (S.S.)
| | - Simon Schmitz
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany; (K.B.); (A.H.); (S.S.)
| | - Ingo Ott
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstrasse 55, D-38106 Braunschweig, Germany; (I.O.); (J.S.)
| | - Julia Schur
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstrasse 55, D-38106 Braunschweig, Germany; (I.O.); (J.S.)
| | - Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany; (K.B.); (A.H.); (S.S.)
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12
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Li YT, Yang C, Wu Y, Lv JJ, Feng X, Tian X, Zhou Z, Pan X, Liu S, Tian LW. Axial Chiral Binaphthoquinone and Perylenequinones from the Stromata of Hypocrella bambusae Are SARS-CoV-2 Entry Inhibitors. JOURNAL OF NATURAL PRODUCTS 2021; 84:436-443. [PMID: 33560122 DOI: 10.1021/acs.jnatprod.0c01136] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A new axial chiral binaphtoquinone, hypocrellone (1), and a new perylenequinone, hypomycin F (2), were isolated from the stromata of Hypocrella bambusae, together with five known compounds, 3-7. The structures of 1 and 2 were assigned by spectroscopic and HRESIMS data analyses. The axial chirality of 1 was determined by electronic circular dichroism data analysis, and the absolute configurations of 2 and 3 were determined by X-ray crystallography. The axial chirality of 7 was determined by UV-induced photooxidation from 4. Compounds 1, 4, and 5 showed inhibitory activity against pseudotyped SARS-CoV-2 infection in 293T-ACE2 cells with IC50 values of 0.17, 0.038, and 0.12 μM. Compounds 4 and 5 were also active against live SARS-CoV-2 infection with EC50 values of 0.22 and 0.21 μM, respectively. Further cell-cell fusion assays, surface plasmon resonance assays, and molecular docking studies revealed that 4 and 5 could bind with the receptor-binding domain of SARS-CoV-2 S protein to prevent its interaction with human angiotensin-converting enzyme II receptor. Our results revealed that 4 and 5 are potential SARS-CoV-2 entry inhibitors.
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Affiliation(s)
| | | | - Yan Wu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Jun-Jiang Lv
- School of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, People's Republic of China
| | | | - Xiaofei Tian
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | | | - Xiaoyan Pan
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
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Khan I, Ibrar A, Zaib S. Alkynoates as Versatile and Powerful Chemical Tools for the Rapid Assembly of Diverse Heterocycles under Transition-Metal Catalysis: Recent Developments and Challenges. Top Curr Chem (Cham) 2021; 379:3. [PMID: 33398642 DOI: 10.1007/s41061-020-00316-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Heterocycles, heteroaromatics and spirocyclic entities are ubiquitous components of a wide plethora of synthetic drugs, biologically active natural products, marketed pharmaceuticals and agrochemical targets. Recognizing their high proportion in drugs and rich pharmacological potential, these invaluable structural motifs have garnered significant interest, thus enabling the development of efficient catalytic methodologies providing access to architecturally complex and diverse molecules with high atom-economy and low cost. These chemical processes not only allow the formation of diverse heterocycles but also utilize a range of flexible and easily accessible building units in a single operation to discover diversity-oriented synthetic approaches. Alkynoates are significantly important, diverse and powerful building blocks in organic chemistry due to their unique and inherent properties such as the electronic bias on carbon-carbon triple bonds posed by electron-withdrawing groups or the metallic coordination site provided by carbonyl groups. The present review highlights the comprehensive picture of the utility of alkynoates (2007-2019) for the synthesis of various heterocycles (> 50 types) using transition-metal catalysts (Ru, Rh, Pd, Ir, Ag, Au, Pt, Cu, Mn, Fe) in various forms. The valuable function of versatile alkynoates (bearing multifunctional groups) as simple and useful starting materials is explored, thus cyclizing with an array of coupling partners to deliver a broad range of oxygen-, nitrogen-, sulfur-containing heterocycles alongside fused-, and spiro-heterocyclic compounds. In addition, these examples will also focus the scope and reaction limitations, as well as mechanistic investigations into the synthesis of these heterocycles. The biological significance will also be discussed, citing relevant examples of drug molecules highlighting each class of heterocycles. This review summarizes the recent developments in the synthetic methods for the synthesis of various heterocycles using alkynoates as readily available starting materials under transition-metal catalysis.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Aliya Ibrar
- Department of Chemistry, Faculty of Natural Sciences, The University of Haripur, Haripur, KPK-22620, Pakistan
| | - Sumera Zaib
- Department of Biochemistry, Faculty of Life Sciences, University of Central Punjab, Lahore, 54590, Pakistan
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Lin L, Xu J. Fungal Pigments and Their Roles Associated with Human Health. J Fungi (Basel) 2020; 6:E280. [PMID: 33198121 PMCID: PMC7711509 DOI: 10.3390/jof6040280] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/08/2020] [Accepted: 11/09/2020] [Indexed: 12/19/2022] Open
Abstract
Fungi can produce myriad secondary metabolites, including pigments. Some of these pigments play a positive role in human welfare while others are detrimental. This paper reviews the types and biosynthesis of fungal pigments, their relevance to human health, including their interactions with host immunity, and recent progresses in their structure-activity relationships. Fungal pigments are grouped into carotenoids, melanin, polyketides, and azaphilones, etc. These pigments are phylogenetically broadly distributed. While the biosynthetic pathways for some fungal pigments are known, the majority remain to be elucidated. Understanding the genes and metabolic pathways involved in fungal pigment synthesis is essential to genetically manipulate the production of both the types and quantities of specific pigments. A variety of fungal pigments have shown wide-spectrum biological activities, including promising pharmacophores/lead molecules to be developed into health-promoting drugs to treat cancers, cardiovascular disorders, infectious diseases, Alzheimer's diseases, and so on. In addition, the mechanistic elucidation of the interaction of fungal pigments with the host immune system provides valuable clues for fighting fungal infections. The great potential of fungal pigments have opened the avenues for academia and industries ranging from fundamental biology to pharmaceutical development, shedding light on our endeavors for disease prevention and treatment.
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Affiliation(s)
- Lan Lin
- School of Life Science and Technology, Department of Bioengineering, Key Laboratory of Developmental Genes and Human Diseases (MOE), Southeast University, Nanjing 210096, Jiangsu, China;
- Department of Biology, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Jianping Xu
- Department of Biology, McMaster University, Hamilton, ON L8S 4K1, Canada
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15
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16
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Al Subeh ZY, Raja HA, Monro S, Flores-Bocanegra L, El-Elimat T, Pearce CJ, McFarland SA, Oberlies NH. Enhanced Production and Anticancer Properties of Photoactivated Perylenequinones. JOURNAL OF NATURAL PRODUCTS 2020; 83:2490-2500. [PMID: 32786877 PMCID: PMC7493285 DOI: 10.1021/acs.jnatprod.0c00492] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Hypocrellins and hypomycins are naturally occurring fungal perylenequinones with potential photodynamic activity against cancer and microbial diseases. This project pursued three lines of research. First, the production of perylenequinones was enhanced by investigating the effect of culture medium and light exposure on their biosynthesis. Solid-fermentation cultures on rice medium allowed for enhanced production of hypocrellins as compared to Cheerios or oatmeal medium. Alternatively, increased production of hypomycins, which are structurally related to the hypocrellins, was observed on oatmeal medium. In both cases, light exposure was an essential factor for the enhanced biosynthesis. In addition, this led to the discovery of two new perylenequinones, ent-shiraiachrome A (5) and hypomycin E (8), which were elucidated based on spectroscopic data. Finally, the photocytotoxic effects of both classes of compounds were evaluated against human skin melanoma, with EC50 values at nanomolar levels for hypocrellins and micromolar levels for hypomycins. In contrast, both classes of compounds showed reduced dark toxicity (EC50 values >100 μM), demonstrating promising phototherapeutic indices.
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Affiliation(s)
- Zeinab Y. Al Subeh
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Huzefa A. Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Susan Monro
- Department of Chemistry, Acadia University, 6 University Avenue, Wolfville, NS B4P 2R6, Canada
| | - Laura Flores-Bocanegra
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Tamam El-Elimat
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Cedric J. Pearce
- Mycosynthetix, Inc., Hillsborough, North Carolina 27278, United States
| | - Sherri A. McFarland
- Department of Chemistry, Acadia University, 6 University Avenue, Wolfville, NS B4P 2R6, Canada
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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17
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Song S, Sun X, Meng L, Wu Q, Wang K, Deng Y. Antifungal activity of hypocrellin compounds and their synergistic effects with antimicrobial agents against Candida albicans. Microb Biotechnol 2020; 14:430-443. [PMID: 32510867 PMCID: PMC7936304 DOI: 10.1111/1751-7915.13601] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 05/08/2020] [Indexed: 12/12/2022] Open
Abstract
Candida albicans is a common human fungal pathogen. The previous study revealed that quinone compounds showed antimicrobial activity against C. albicans by inhibiting cell growth. However, it was unclear whether quinones have other antifungal effects against C. albicans in addition to fungicidal effects. In this study, we assessed the inhibitory activity of a total of 25 quinone compounds against C. albicans morphological transition, which is essential for the pathogenicity of C. albicans. Several quinones exhibited strong inhibition of mycelium formation by C. albicans SC5314. Three leading compounds, namely hypocrellins A, B and C, also exhibited marked attenuation of C. albicans SC5314 virulence in both human cell lines and mouse infection models. These three compounds significantly suppressed the proliferation of C. albicans SC5314 cells in a mouse mucosal infection model. Intriguingly, hypocrellins not only attenuated the cytotoxicity of a nystatin-resistant C. albicans strain but also showed excellent synergistic effects with antifungal agents against both wild-type C. albicans SC5314 and the drug-resistant mutant strains. In addition, hypocrellins A, B and C interfered with the biological functions and virulence of various clinical Candida species, suggesting the promising potential of these compounds for development as new therapeutic agents against infections caused by Candida pathogens.
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Affiliation(s)
- Shihao Song
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou, 510275, China.,College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Xiuyun Sun
- College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Lili Meng
- College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Qianhua Wu
- College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Ke Wang
- Pulmonary and Critical Care Medicine Ward, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Yinyue Deng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou, 510275, China.,College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
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18
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Zhao N, Li D, Guo BJ, Tao X, Lin X, Yan SZ, Chen SL. Genome Sequencing and Analysis of the Hypocrellin-Producing Fungus Shiraia bambusicola S4201. Front Microbiol 2020; 11:643. [PMID: 32373091 PMCID: PMC7179677 DOI: 10.3389/fmicb.2020.00643] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 03/20/2020] [Indexed: 12/29/2022] Open
Abstract
Shiraia bambusicola has long been used as a traditional Chinese medicine and its major medicinal active metabolite is hypocrellin, which exhibits outstanding antiviral and antitumor properties. Here we report the 32 Mb draft genome sequence of S. bambusicola S4201, encoding 11,332 predicted genes. The genome of S. bambusicola is enriched in carbohydrate-active enzymes (CAZy) and pathogenesis-related genes. The phylogenetic tree of S. bambusicola S4201 and nine other sequenced species was constructed and its taxonomic status was supported (Pleosporales, Dothideomycetes). The genome contains a rich set of secondary metabolite biosynthetic gene clusters, suggesting that strain S4201 has a remarkable capacity to produce secondary metabolites. Overexpression of the zinc finger transcription factor zftf, which is involved in hypocrellin A (HA) biosynthesis, increases HA production when compared with wild type. In addition, a new putative HA biosynthetic pathway is proposed. These results provide a framework to study the mechanisms of infection in bamboo and to understand the phylogenetic relationships of S. bambusicola S4201. At the same time, knowledge of the genome sequence may potentially solve the puzzle of HA biosynthesis and lead to the discovery of novel genes and secondary metabolites of importance in medicine and agriculture.
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Affiliation(s)
- Ning Zhao
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Dan Li
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Bing-Jing Guo
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xin Tao
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xi Lin
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Shu-Zhen Yan
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Shuang-Lin Chen
- College of Life Sciences, Nanjing Normal University, Nanjing, China
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19
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Cai J, Wang Z, Zhang Y, Yao F, Hu X, Liu W. Synthesis of Polysubstituted 2‐Naphthols by Palladium‐Catalyzed Intramolecular Arylation/Aromatization Cascade. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jinhui Cai
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
| | - Zhen‐Kai Wang
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
| | - Yun‐Hao Zhang
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
| | - Fei Yao
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
| | - Xu‐Dong Hu
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
| | - Wen‐Bo Liu
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular SciencesWuhan University Hubei 430072 People's Republic of China
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20
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Wu LY, Usman M, Liu WB. Enantioselective Iron/Bisquinolyldiamine Ligand-Catalyzed Oxidative Coupling Reaction of 2-Naphthols. Molecules 2020; 25:E852. [PMID: 32075144 PMCID: PMC7070846 DOI: 10.3390/molecules25040852] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/01/2020] [Accepted: 02/12/2020] [Indexed: 12/11/2022] Open
Abstract
An iron-catalyzed asymmetric oxidative homo-coupling of 2-naphthols for the synthesis of 1,1'-Bi-2-naphthol (BINOL) derivatives is reported. The coupling reaction provides enantioenriched BINOLs in good yields (up to 99%) and moderate enantioselectivities (up to 81:19 er) using an iron-complex generated in situ from Fe(ClO4)2 and a bisquinolyldiamine ligand [(1R,2R)-N1,N2-di(quinolin-8-yl)cyclohexane-1,2-diamine, L1]. A number of ligands (L2-L8) and the analogs of L1, with various substituents and chiral backbones, were synthesized and examined in the oxidative coupling reactions.
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Affiliation(s)
| | | | - Wen-Bo Liu
- Sauvage Center for Molecular Sciences; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education; College of Chemistry and Molecular Sciences; Wuhan University, Wuhan 430072, Hubei, China; (L.-Y.W.); (M.U.)
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21
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Nitric Oxide and Hydrogen Peroxide Signaling in Extractive Shiraia Fermentation by Triton X-100 for Hypocrellin A Production. Int J Mol Sci 2020; 21:ijms21030882. [PMID: 32019072 PMCID: PMC7037624 DOI: 10.3390/ijms21030882] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 11/17/2022] Open
Abstract
Shiraia mycelial culture is a promising biotechnological alternative for the production of hypocrellin A (HA), a new photosensitizer for anticancer photodynamic therapy (PDT). The extractive fermentation of intracellular HA in the nonionic surfactant Triton X-100 (TX100) aqueous solution was studied in the present work. The addition of 25 g/L TX100 at 36 h of the fermentation not only enhanced HA exudation to the broth by 15.6-fold, but stimulated HA content in mycelia by 5.1-fold, leading to the higher production 206.2 mg/L, a 5.4-fold of the control on day 9. After the induced cell membrane permeabilization by TX100 addition, a rapid generation of nitric oxide (NO) and hydrogen peroxide (H2O2) was observed. The increase of NO level was suppressed by the scavenger vitamin C (VC) of reactive oxygen species (ROS), whereas the induced H2O2 production could not be prevented by the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PTIO), suggesting that NO production may occur downstream of ROS in the extractive fermentation. Both NO and H2O2 were proved to be involved in the expressions of HA biosynthetic genes (Mono, PKS and Omef) and HA production. NO was found to be able to up-regulate the expression of transporter genes (MFS and ABC) for HA exudation. Our results indicated the integrated role of NO and ROS in the extractive fermentation and provided a practical biotechnological process for HA production.
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Ben‐Lulu M, Gaster E, Libman A, Pappo D. Synthesis of Biaryl‐Bridged Cyclic Peptides via Catalytic Oxidative Cross‐Coupling Reactions. Angew Chem Int Ed Engl 2020; 59:4835-4839. [DOI: 10.1002/anie.201913305] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/21/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Mor Ben‐Lulu
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Eden Gaster
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Anna Libman
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Doron Pappo
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
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23
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Ben‐Lulu M, Gaster E, Libman A, Pappo D. Synthesis of Biaryl‐Bridged Cyclic Peptides via Catalytic Oxidative Cross‐Coupling Reactions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913305] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Mor Ben‐Lulu
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Eden Gaster
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Anna Libman
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
| | - Doron Pappo
- Department of ChemistryBen-Gurion University of the Negev Beer Sheva 84105 Israel
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24
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Kotha S, Meshram M. Development of New Synthetic Strategies, Tactics and their Applications. CHEM REC 2019; 19:2480-2504. [DOI: 10.1002/tcr.201900041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai- 400 076 India
| | - Milind Meshram
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai- 400 076 India
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25
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Hanchate V, Kumar A, Prabhu KR. Synthesis of Naphthols by Rh(III)-Catalyzed Domino C–H Activation, Annulation, and Lactonization Using Sulfoxonium Ylide as a Traceless Directing Group. Org Lett 2019; 21:8424-8428. [DOI: 10.1021/acs.orglett.9b03182] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vinayak Hanchate
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
| | - Anil Kumar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
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Ma YJ, Zheng LP, Wang JW. Bacteria Associated With Shiraia Fruiting Bodies Influence Fungal Production of Hypocrellin A. Front Microbiol 2019; 10:2023. [PMID: 31572311 PMCID: PMC6749022 DOI: 10.3389/fmicb.2019.02023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 08/19/2019] [Indexed: 12/19/2022] Open
Abstract
Hypocrellin A (HA) is a natural red perylenequinone pigment from Shiraia fruiting body, which was used clinically on various skin diseases and developed as a photodynamic therapy agent against cancers. The fruiting bodies may harbor a diverse but poorly understood microbial community. In this study, we characterized the bacterial community of Shiraia fruiting body using a combination of culture-based method and Illumina high-throughput sequencing, and tested the involvement of some companion bacteria in fungal HA production using the fungal-bacterial confrontation assay. Our results revealed that the bacterial community in the fruiting body was dominated by Bacillus and Pseudomonas. Some Pseudomonas isolates such as P. fulva, P. putida, and P. parafulva could stimulate fungal HA accumulation by Shiraia sp. S9. The bacterial treatment of P. fulva SB1 up-regulated the expression of polyketide synthase (PKS) for HA biosynthesis and transporter genes including ATP-binding cassette (ABC) and major facilitator superfamily transporter (MFS) for HA exudation. After the addition of live P. fulva SB1, the mycelium cultures of Shiraia sp. S9 presented a higher HA production (225.34 mg/L), about 3.25-fold over the mono-culture. On the other hand, B. cereus was capable of alleviating fungal self-toxicity from HA via down-regulation of HA biosynthetic genes or possible biodegradation on HA. To our knowledge, this is the first report on the diversified species of bacteria associated with Shiraia fruiting bodies and the regulation roles of the companion bacteria on fungal HA biosynthesis. Furthermore, the bacterial co-culture provided a good strategy for the enhanced HA production by Shiraia.
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Affiliation(s)
- Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Li Ping Zheng
- Department of Horticultural Sciences, Soochow University, Suzhou, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, China
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Ma YJ, Zheng LP, Wang JW. Inducing perylenequinone production from a bambusicolous fungus Shiraia sp. S9 through co-culture with a fruiting body-associated bacterium Pseudomonas fulva SB1. Microb Cell Fact 2019; 18:121. [PMID: 31277643 PMCID: PMC6612088 DOI: 10.1186/s12934-019-1170-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/29/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Fungal perylenequinonoid (PQ) pigments from Shiraia fruiting body have been well known as excellent photosensitizers for medical and agricultural uses. The fruiting bodies are colonized by a diverse bacterial community of unknown function. We screened the companion bacteria from the fruiting body of Shiraia sp. S9 and explored the bacterial elicitation on fungal PQ production. RESULTS A bacterium Pseudomonas fulva SB1 isolated from the fruiting body was found to stimulate the production of fungal PQs including hypocrellins A, C (HA and HC), and elsinochromes A-C (EA, EB and EC). After 2 days of co-cultures, Shiraia mycelium cultures presented the highest production of HA (325.87 mg/L), about 3.20-fold of that in axenic culture. The co-culture resulted in the induction of fungal conidiation and the formation of more compact fungal pellets. Furthermore, the bacterial treatment up-regulated the expression of polyketide synthase gene (PKS), and activated transporter genes of ATP-binding cassette (ABC) and major facilitator superfamily transporter (MFS) for PQ exudation. CONCLUSIONS We have established a bacterial co-culture with a host Shiraia fungus to induce PQ biosynthesis. Our results provide a basis for understanding bacterial-fungal interaction in fruiting bodies and a practical co-culture process to enhance PQ production for photodynamic therapy medicine.
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Affiliation(s)
- Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Li Ping Zheng
- Department of Horticultural Sciences, Soochow University, Suzhou, 215123, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.
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Hu J, Sarrami F, Li H, Zhang G, Stubbs KA, Lacey E, Stewart SG, Karton A, Piggott AM, Chooi YH. Heterologous biosynthesis of elsinochrome A sheds light on the formation of the photosensitive perylenequinone system. Chem Sci 2019; 10:1457-1465. [PMID: 30809363 PMCID: PMC6354827 DOI: 10.1039/c8sc02870b] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 11/21/2018] [Indexed: 12/14/2022] Open
Abstract
Perylenequinones are a class of aromatic polyketides characterised by a highly conjugated pentacyclic core, which confers them with potent light-induced bioactivities and unique photophysical properties. Despite the biosynthetic gene clusters for the perylenequinones elsinochrome A (1), cercosporin (4) and hypocrellin A (6) being recently identified, key biosynthetic aspects remain elusive. Here, we first expressed the intact elc gene cluster encoding 1 from the wheat pathogen Parastagonospora nodorum heterologously in Aspergillus nidulans on a yeast-fungal artificial chromosome (YFAC). This led to the identification of a novel flavin-dependent monooxygenase, ElcH, responsible for oxidative enolate coupling of a perylenequinone intermediate to the hexacyclic dihydrobenzo(ghi)perylenequinone in 1. In the absence of ElcH, the perylenequione intermediate formed a hexacyclic cyclohepta(ghi)perylenequinone system via an intramolecular aldol reaction resulting in 6 and a novel hypocrellin 12 with opposite helicity to 1. Theoretical calculations supported that 6 and 12 resulted from atropisomerisation upon formation of the 7-membered ring. Using a bottom-up pathway reconstruction approach on a tripartite YFAC system developed in this study, we uncovered that both a berberine bridge enzyme-like oxidase ElcE and a laccase-like multicopper oxidase ElcG are involved in the double coupling of two naphthol intermediates to form the perylenequinone core. Gene swapping with the homologs from the biosynthetic pathway of 4 showed that cognate pairing of the two classes of oxidases is required for the formation of the perylenequinone core, suggesting the involvement of protein-protein interactions.
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Affiliation(s)
- Jinyu Hu
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Farzaneh Sarrami
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Hang Li
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Guozhi Zhang
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Keith A Stubbs
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Ernest Lacey
- Microbial Screening Technologies , Smithfield , NSW 2164 , Australia
- Department of Molecular Sciences , Macquarie University , Sydney , NSW 2109 , Australia
| | - Scott G Stewart
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Amir Karton
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
| | - Andrew M Piggott
- Department of Molecular Sciences , Macquarie University , Sydney , NSW 2109 , Australia
| | - Yit-Heng Chooi
- School of Molecular Sciences , University of Western Australia , Perth , WA 6009 , Australia .
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29
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Zhou C, Fang F, Cheng Y, Li Y, Liu H, Zhou Y. Rhodium(III)-Catalyzed C-H Activation of Benzoylacetonitriles and Cyclization with Sulfoxonium Ylides to Naphthols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800362] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chaofan Zhou
- Nano Science and Technology Institute; University of Science and Technology of China; 166 Ren Ai Road Suzhou 215123 People's Republic of China
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
| | - Feifei Fang
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
| | - Yilang Cheng
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
| | - Yazhou Li
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
| | - Hong Liu
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
| | - Yu Zhou
- Key Laboratory of Receptor Research, S; hanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 People's Republic of China
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30
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Sidi Boune MV, Ould Elemine B, Lepitre T, Ould Hadou A, Aliyenne A, Boumediana AI, Daïch A, Othman M, Lawson AM. Development of SECheM Concept for Isolation and Chemical Modification of Gossypol Directly from Cienfuegosia digitata. PHYTOCHEMICAL ANALYSIS : PCA 2017; 28:410-415. [PMID: 28474346 DOI: 10.1002/pca.2688] [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: 01/24/2017] [Revised: 03/12/2017] [Accepted: 03/17/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Gossypol is an axially chiral natural polyphenol classically extracted from the Malavaceae family. Nevertheless, its extraction and isolation from a plant can be quite complicated and extremely time-consuming since gossypol is known to be sensitive to degradation under solvents, high temperature and light action. Moreover, its purification over column chromatography is a challenging problem due to its ability to oxidise and the existence of various tautomer forms. OBJECTIVE To develop an efficient "one-step" strategy for simultaneous extraction and semi-synthesis by short-circuiting critical gossypol isolation and purification steps. METHODOLOGY Gossypol was first isolated from Cienfuegosia digitata roots, characterised (by 1D and 2D NMR) and quantified (by UV spectrophotometry). Thus, aniline was selected to test the "one-step" in situ trapping of freshly extracted gossypol leading to a Schiff base analogue. After screening solvents and extraction times on this model reaction, the "SECheM" (simultaneous extraction and chemical modification) concept was successfully extended to other amines, underlining the efficiency and the robustness of the strategy. RESULTS After having shown that gossypol occurred as a major compound in C. digitata roots, different experimental procedures using Soxhlet extraction in the presence of aniline pointed out the best conditions for the SECheM concept (7 h of reaction and extraction time in ether as solvent). Ultimately, the concept has been generalised to 17 other amines. CONCLUSION This is a report of the first semi-synthesis that allows: (1) "in situ" preparation of more stable gossypol Schiff base derivatives directly from ground plant material and (2) circumvention of gossypol extraction and purification problems. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Mohamed Vall Sidi Boune
- Normandie Université, UNILEHAVRE, URCOM, EA 3221, FR 3038 CNRS, F-76600, Le Havre, France
- Université des Sciences, de Technologies et de Médecine (USTM), UCME, B.P 5026, Nouakchott, Mauritanie
| | - Brahim Ould Elemine
- Université des Sciences, de Technologies et de Médecine (USTM), UCME, B.P 5026, Nouakchott, Mauritanie
| | - Thomas Lepitre
- Normandie Université, UNILEHAVRE, URCOM, EA 3221, FR 3038 CNRS, F-76600, Le Havre, France
| | - Abderrahmane Ould Hadou
- Université des Sciences, de Technologies et de Médecine (USTM), UCME, B.P 5026, Nouakchott, Mauritanie
| | - Ahmed Aliyenne
- Université des Sciences, de Technologies et de Médecine (USTM), UCME, B.P 5026, Nouakchott, Mauritanie
- Département des Sciences Exactes, Ecole Normale Supérieure de Nouakchott, B.P 90 Ksar, Nouakchott, Mauritanie
| | - Ahmed Ismaïl Boumediana
- Département des Sciences Exactes, Ecole Normale Supérieure de Nouakchott, B.P 90 Ksar, Nouakchott, Mauritanie
| | - Adam Daïch
- Normandie Université, UNILEHAVRE, URCOM, EA 3221, FR 3038 CNRS, F-76600, Le Havre, France
| | - Mohamed Othman
- Normandie Université, UNILEHAVRE, URCOM, EA 3221, FR 3038 CNRS, F-76600, Le Havre, France
| | - Ata Martin Lawson
- Normandie Université, UNILEHAVRE, URCOM, EA 3221, FR 3038 CNRS, F-76600, Le Havre, France
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Abstract
Transition metal-mediated C-H bond activation and functionalization represent one of the most straightforward and powerful tools in modern organic synthetic chemistry. Bi(hetero)aryls are privileged π-conjugated structural cores in biologically active molecules, organic functional materials, ligands, and organic synthetic intermediates. The oxidative C-H/C-H coupling reactions between two (hetero)arenes through 2-fold C-H activation offer a valuable opportunity for rapid assembly of diverse bi(hetero)aryls and further exploitation of their applications in pharmaceutical and material sciences. This review provides a comprehensive overview of the fundamentals and applications of transition metal-mediated/catalyzed oxidative C-H/C-H coupling reactions between two (hetero)arenes. The substrate scope, limitation, reaction mechanism, regioselectivity, and chemoselectivity, as well as related control strategies of these reactions are discussed. Additionally, the applications of these established methods in the synthesis of natural products and exploitation of new organic functional materials are exemplified. In the last section, a short introduction on oxidant- or Lewis acid-mediated oxidative Ar-H/Ar-H coupling reactions is presented, considering that it is a very powerful method for the construction of biaryl units and polycylic arenes.
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Affiliation(s)
- Yudong Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Jingbo Lan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
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Wang Q, Xu Y, Yang X, Li Y, Li X. Naphthol synthesis: annulation of nitrones with alkynes via rhodium(iii)-catalyzed C–H activation. Chem Commun (Camb) 2017; 53:9640-9643. [DOI: 10.1039/c7cc05000c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and redox-neutral naphthol synthesis has been realized via rhodium(iii) catalyzed C–H activation of α-carbonyl nitrones and annulation with alkynes, where the nitrone group functioned as a traceless directing group.
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Affiliation(s)
- Qiang Wang
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Youwei Xu
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xifa Yang
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Yunyun Li
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xingwei Li
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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33
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Narute S, Parnes R, Toste FD, Pappo D. Enantioselective Oxidative Homocoupling and Cross-Coupling of 2-Naphthols Catalyzed by Chiral Iron Phosphate Complexes. J Am Chem Soc 2016; 138:16553-16560. [PMID: 27959518 DOI: 10.1021/jacs.6b11198] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Novel chiral iron phosphate complexes were prepared as catalysts for asymmetric oxidative coupling reactions. These catalysts were applied for the synthesis of enantio-enriched C1- and C2-symmetric BINOLs, in which the 3 and 3' positions are available for chemical modifications. It was proposed that the reaction takes place via an oxidative radical-anion coupling mechanism. A destructive BINOL racemization that competes with the enantioselective oxidative coupling of 2-naphthols was revealed, thereby offering new insights into this highly important reaction.
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Affiliation(s)
- Sachin Narute
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
| | - Regev Parnes
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
| | - F Dean Toste
- Department of Chemistry, University of California , Berkeley, California 94720, United States
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
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34
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Sako M, Takizawa S, Yoshida Y, Sasai H. Enantioselective and aerobic oxidative coupling of 2-naphthol derivatives using chiral dinuclear vanadium(V) complex in water. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.05.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Improved production of phleichrome from the phytopathogenic fungus Cladosporium phlei using synthetic inducers and photodynamic ROS production by phleichrome. J Biosci Bioeng 2015; 119:289-96. [DOI: 10.1016/j.jbiosc.2014.08.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/14/2014] [Accepted: 08/19/2014] [Indexed: 11/23/2022]
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36
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37
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Prause F, Arensmeyer B, Fröhlich B, Breuning M. In-depth structure–selectivity investigations on asymmetric, copper-catalyzed oxidative biaryl coupling in the presence of 5-cis-substituted prolinamines. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01676a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper complexes of 5-cis-substituted prolinamines provided up to 87% ee in the enantioselective oxidative biaryl coupling of 3-hydroxy-2-naphthoates.
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Affiliation(s)
- Felix Prause
- Organic Chemistry Laboratory
- University of Bayreuth
- 95447 Bayreuth
- Germany
| | | | - Benjamin Fröhlich
- Institute of Organic Chemistry
- University of Würzburg
- 97074 Würzburg
- Germany
| | - Matthias Breuning
- Organic Chemistry Laboratory
- University of Bayreuth
- 95447 Bayreuth
- Germany
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38
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Zhao H, Yin R, Chen D, Ren J, Wang Y, Zhanga J, Deng H, Wang Y, Qiu H, Huang N, Zou Q, Zhao J, Gu Y. In vitro and in vivo antitumor activity of a novel hypocrellin B derivative for photodynamic therapy. Photodiagnosis Photodyn Ther 2014; 11:204-12. [DOI: 10.1016/j.pdpdt.2014.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/29/2014] [Accepted: 01/31/2014] [Indexed: 11/25/2022]
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40
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Abstract
Important biomimetic steps in natural product synthesis have been promoted by transition metals, as exemplified by this beautiful ruthenium-catalyzed rearrangement of an endoperoxide into elysiapyrone A. Such reactions are supposed to occur during the biosynthesis, yet under different catalysis conditions.
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Affiliation(s)
- Xu-Wen Li
- Muséum National d'Histoire Naturelle and Centre National de la Recherche Scientifique
- Unité “Molécules de Communication et Adaptation des Micro-organismes” (UMR 7245 CNRS-MNHN)
- 75005 Paris, France
| | - Bastien Nay
- Muséum National d'Histoire Naturelle and Centre National de la Recherche Scientifique
- Unité “Molécules de Communication et Adaptation des Micro-organismes” (UMR 7245 CNRS-MNHN)
- 75005 Paris, France
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41
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Kotha S, Goyal D, Chavan AS. Diversity-Oriented Approaches to Unusual α-Amino Acids and Peptides: Step Economy, Atom Economy, Redox Economy, and Beyond. J Org Chem 2013; 78:12288-313. [DOI: 10.1021/jo4020722] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
| | - Deepti Goyal
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
| | - Arjun S. Chavan
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
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42
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Alamsetti SK, Poonguzhali E, Ganapathy D, Sekar G. Enantioselective Oxidative Coupling of 2-Naphthol Derivatives by Copper-(R)-1,1′-Binaphthyl-2,2′-diamine-TEMPO Catalyst. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300513] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Allen SE, Walvoord RR, Padilla-Salinas R, Kozlowski MC. Aerobic copper-catalyzed organic reactions. Chem Rev 2013; 113:6234-458. [PMID: 23786461 PMCID: PMC3818381 DOI: 10.1021/cr300527g] [Citation(s) in RCA: 1228] [Impact Index Per Article: 111.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Scott E. Allen
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Ryan R. Walvoord
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Rosaura Padilla-Salinas
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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44
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Dickstein JS, Curto JM, Gutierrez O, Mulrooney CA, Kozlowski MC. Mild aromatic palladium-catalyzed protodecarboxylation: kinetic assessment of the decarboxylative palladation and the protodepalladation steps. J Org Chem 2013; 78:4744-61. [PMID: 23590518 DOI: 10.1021/jo400222c] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Mechanism studies of a mild palladium-catalyzed decarboxylation of aromatic carboxylic acids are described. In particular, reaction orders and activation parameters for the two stages of the transformation were determined. These studies guided development of a catalytic system capable of turnover. Further evidence reinforces that the second stage, protonation of the arylpalladium intermediate, is the rate-determining step of the reaction. The first step, decarboxylative palladation, is proposed to occur through an intramolecular electrophilic palladation pathway, which is supported by computational and mechanism studies. In contrast to the reverse reaction (C-H insertion), the data support an electrophilic aromatic substitution mechanism involving a stepwise intramolecular protonation sequence for the protodepalladation portion of the reaction.
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Affiliation(s)
- Joshua S Dickstein
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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45
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Mulrooey CA, O'Brien EM, Morgan BJ, Kozlowski MC. Perylenequinones: Isolation, Synthesis, and Biological Activity. European J Org Chem 2012; 2012:3887-3904. [PMID: 24039544 PMCID: PMC3770481 DOI: 10.1002/ejoc.201200184] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Indexed: 12/16/2022]
Abstract
The perylenequinones are a novel class of natural products characterized by pentacyclic conjugated chromophore giving rise to photoactivity. Potentially useful light-activated biological activity, targeting protein kinase C (PKC), has been identified for several of the natural products. Recently discovered new members of this class of compound, as well as several related phenanthroperylenequinones, are reviewed. Natural product modifications that improve biological profiles, and avenues for the total synthesis of analogs, which are not available from the natural product series, are outlined. An overview of structure/function relationships is provided.
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Affiliation(s)
- Carol A Mulrooey
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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46
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Podlesny EE, Kozlowski MC. Structural reassignment of a marine metabolite from a binaphthalenetetrol to a tetrabrominated diphenyl ether. JOURNAL OF NATURAL PRODUCTS 2012; 75:1125-9. [PMID: 22690692 PMCID: PMC3399761 DOI: 10.1021/np300141t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The structure of a reported natural product isolate has been revised from (S)-2,2'-dimethoxy-[1,1'-binaphthalene]-5,5',6,6'-tetraol to a known tetrabrominated diphenyl ether. After total synthesis of the reported binaphthalenetetrol was accomplished via a key reduction of a binaphtho-ortho-quinone, comparison of the physical properties and NMR spectroscopic data of the synthetic material indicated that the structure of the natural product isolate was incorrect. Evaluation of the authentic natural product suggested the structure is a tetrabrominated diphenyl ether, likely 3,5-dibromo-2-(3,5-dibromo-2-methoxyphenoxy)phenol.
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47
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Deng H, Liu X, Xie J, Yin R, Huang N, Gu Y, Zhao J. Quantitative and Site-Directed Chemical Modification of Hypocrellins toward Direct Drug Delivery and Effective Photodynamic Activity. J Med Chem 2012; 55:1910-9. [DOI: 10.1021/jm2017368] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong Deng
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Xin Liu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Jie Xie
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Rong Yin
- Department of Laser Medicine, Chinese PLA General Hospital, Beijing 100853, People’s
Republic of China
| | - Naiyan Huang
- Department of Laser Medicine, Chinese PLA General Hospital, Beijing 100853, People’s
Republic of China
| | - Ying Gu
- Department of Laser Medicine, Chinese PLA General Hospital, Beijing 100853, People’s
Republic of China
| | - Jingquan Zhao
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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Podlesny EE, Kozlowski MC. Enantioselective total synthesis of (S)-bisoranjidiol, an axially chiral bisanthraquinone. Org Lett 2012; 14:1408-11. [PMID: 22360604 DOI: 10.1021/ol3001365] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first enantioselective total synthesis of the bisanthraquinone (S)-bisoranjidiol and an unnatural regioisomer has been accomplished. Key features of the synthesis include the asymmetric oxidative biaryl coupling of a hindered 8-substituted 2-naphthol, selective para-quinone formation, and regioselective tandem Diels-Alder/aromatization reactions.
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Affiliation(s)
- Erin E Podlesny
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Wendlandt AE, Suess AM, Stahl SS. Kupferkatalysierte aerobe oxidative C-H-Funktionalisierungen: Trends und Erkenntnisse zum Mechanismus. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103945] [Citation(s) in RCA: 296] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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50
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Wendlandt AE, Suess AM, Stahl SS. Copper-catalyzed aerobic oxidative C-H functionalizations: trends and mechanistic insights. Angew Chem Int Ed Engl 2011; 50:11062-87. [PMID: 22034061 DOI: 10.1002/anie.201103945] [Citation(s) in RCA: 1103] [Impact Index Per Article: 84.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Indexed: 01/04/2023]
Abstract
The selective oxidation of C-H bonds and the use of O(2) as a stoichiometric oxidant represent two prominent challenges in organic chemistry. Copper(II) is a versatile oxidant, capable of promoting a wide range of oxidative coupling reactions initiated by single-electron transfer (SET) from electron-rich organic molecules. Many of these reactions can be rendered catalytic in Cu by employing molecular oxygen as a stoichiometric oxidant to regenerate the active copper(II) catalyst. Meanwhile, numerous other recently reported Cu-catalyzed C-H oxidation reactions feature substrates that are electron-deficient or appear unlikely to undergo single-electron transfer to copper(II). In some of these cases, evidence has been obtained for the involvement of organocopper(III) intermediates in the reaction mechanism. Organometallic C-H oxidation reactions of this type represent important new opportunities for the field of Cu-catalyzed aerobic oxidations.
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Affiliation(s)
- Alison E Wendlandt
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA
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