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Yang X, Wu W, Li H, Zhang M, Chu Z, Wang X, Sun P. Natural occurrence, bioactivity, and biosynthesis of triene-ansamycins. Eur J Med Chem 2022; 244:114815. [DOI: 10.1016/j.ejmech.2022.114815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/20/2022] [Accepted: 09/29/2022] [Indexed: 11/04/2022]
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2
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Li H, Chen S, Wang J, Zhang M, Wu W, Liu W, Sun P. Ansafurantrienins, Unprecedented Ansatrienin Derivatives Formed via Photocatalytic Intramolecular [3 + 2] Oxidative Cycloaddition. Org Lett 2022; 24:592-596. [PMID: 34981945 DOI: 10.1021/acs.orglett.1c04032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ansafurantrienins A-H, bearing a unique 5/6/8 dihydrofuran-fused benzo[b]azocine chromophore, were isolated from Streptomyces flaveolus. Their structures, especially in the dihydrofuran unit, were unambiguously established by spectroscopic analyses, molecular modeling, and TDDFT/ECD calculations. The ansafurantrienins were proposed to be generated via intramolecular [3 + 2] oxidative cycloaddition, which was achieved by photocatalytic reaction with UV light and oxygen and found to have solvent-dependent stereoselectivity. Ansafurantrienins showed significant antiproliferative effects against pancreatic cancer cells. The results led to a structural revision of strecacansamycins.
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Affiliation(s)
- Hongji Li
- School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Shuo Chen
- School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China.,College of Food Science and Technology, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai 201306, People's Republic of China
| | - Jinxin Wang
- School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Mengxue Zhang
- School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China.,College of Food Science and Technology, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai 201306, People's Republic of China
| | - Wenhui Wu
- College of Food Science and Technology, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai 201306, People's Republic of China
| | - Wen Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Peng Sun
- School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
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Benzothiazoles from Condensation of o-Aminothiophenoles with Carboxylic Acids and Their Derivatives: A Review. Molecules 2021; 26:molecules26216518. [PMID: 34770926 PMCID: PMC8587170 DOI: 10.3390/molecules26216518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 01/27/2023] Open
Abstract
Nowadays, organic chemists are interested in the field of heterocyclic chemistry due to its use in the synthesis of a great variety of biologically active compounds. Heterocyclic compounds are widely found in nature and are essential for life. Among these, some natural nitrogen containing heterocyclic compounds have been used as chemotherapeutic agents. Their attachment to sugar molecules either as thioglycosides or as nucleosides analogues plays an important role in vital biological processes as well as in synthetic organic chemistry. Molecules containing benzothiazole (BT) nuclei are of this interesting class of compounds because some of them have been found to have a wide variety of biological activities. In this sense, we selected this topic to review and to then summarize the procedures related to the condensation reactions of o-aminothiophenoles (ATPs) as well as their disulfides with carboxylic acids, esters, orthoesters, acyl chlorides, amides, and nitriles. The condensation reactions with carbon dioxide (CO2) are included. Conventional methods with the use of acid and metal catalysts as well as recent green techniques, such as microwave irradiation, the use of ionic liquids, and ultrasound (US) chemistry, which have proven to have many advantages, were found in the review.
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4
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Feng Y, Yang C, Deng Q, Xiong R, Zhang X, Xiong Y. Synthesis of Antitricyclic Morpholine Derivatives through Iodine(III)-Mediated Intramolecular Umpolung Cycloaddition of Olefins. J Org Chem 2020; 85:4500-4506. [PMID: 32098469 DOI: 10.1021/acs.joc.0c00286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A (diacetoxyiodo)benzene-mediated intramolecular cycloaddition of olefins to construct tricyclic morpholines is presented. A series of substituted tricyclic morpholines were obtained in one-step simple operation under mild conditions, and the NMR studies were employed to see the interaction of reactants. The studies on stereochemistry showed that transformation of Z-alkene was inhibited, which is interpreted by density functional theory calculations on Z- and E-transition state models, and only E-alkene resulted in an anticycloaddition product, which is testified by a single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Yangyang Feng
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Chenglin Yang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Qingfu Deng
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Ruimei Xiong
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Xiaohui Zhang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Yan Xiong
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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5
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Jethava DJ, Acharya PT, Vasava MS, Bhoi MN, Bhavsar ZA, Rathwa SK, Rajani DP, Patel HD. Design, synthesis, biological evaluation and computational study of novel triazolo [4,3-a]pyrazin analogues. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.01.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Li G, Lou HX. Strategies to diversify natural products for drug discovery. Med Res Rev 2017; 38:1255-1294. [PMID: 29064108 DOI: 10.1002/med.21474] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/18/2017] [Accepted: 09/28/2017] [Indexed: 12/11/2022]
Abstract
Natural product libraries contain specialized metabolites derived from plants, animals, and microorganisms that play a pivotal role in drug discovery due to their immense structural diversity and wide variety of biological activities. The strategies to greatly extend natural product scaffolds through available biological and chemical approaches offer unique opportunities to access a new series of natural product analogues, enabling the construction of diverse natural product-like libraries. The affordability of these structurally diverse molecules has been a crucial step in accelerating drug discovery. This review provides an overview of various approaches to exploit the diversity of compounds for natural product-based drug development, drawing upon a series of examples to illustrate each strategy.
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Affiliation(s)
- Gang Li
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Hong-Xiang Lou
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China.,Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, China
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7
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Li X, Zhu J, Shi G, Sun M, Guo Z, Wang H, Lu C, Shen Y. Deletion of the side chain assembly reveals diverse post-PKS modifications in the biosynthesis of ansatrienins. RSC Adv 2016. [DOI: 10.1039/c6ra19036g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Seven new ansatrienols were extracted from Streptomyces sp., and 3 showed anti-T3SS activity, demonstrating diverse post-PKS modifications during ansatrienin biosynthesis.
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Affiliation(s)
- Xiaomei Li
- Key Laboratory of Chemical Biology (Ministry of Education)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan
- P. R. China
| | - Jing Zhu
- State Key Laboratory of Microbial Technology
- School of Life Sciences
- Shandong University
- Jinan
- P. R. China
| | - Guoyin Shi
- State Key Laboratory of Microbial Technology
- School of Life Sciences
- Shandong University
- Jinan
- P. R. China
| | - Mingwei Sun
- Key Laboratory of Chemical Biology (Ministry of Education)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan
- P. R. China
| | - Zhixing Guo
- Key Laboratory of Chemical Biology (Ministry of Education)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan
- P. R. China
| | - Haoxin Wang
- State Key Laboratory of Microbial Technology
- School of Life Sciences
- Shandong University
- Jinan
- P. R. China
| | - Chunhua Lu
- Key Laboratory of Chemical Biology (Ministry of Education)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan
- P. R. China
| | - Yuemao Shen
- Key Laboratory of Chemical Biology (Ministry of Education)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan
- P. R. China
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Song YN, Zhang WJ, Bi SF, Jiao RH, Tan RX, Ge HM. New ansamycin analogues from the mutant strain of Streptomyces seoulensis. J Antibiot (Tokyo) 2015; 68:757-9. [PMID: 26058569 DOI: 10.1038/ja.2015.65] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/10/2015] [Accepted: 05/14/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Ya-Nan Song
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Wen-Jing Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Shu-Feng Bi
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Rui-Hua Jiao
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Ren-Xiang Tan
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Hui-Ming Ge
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
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Xie C, Deng JJ, Wang HX. Identification of AstG1, A LAL family regulator that positively controls ansatrienins production in Streptomyces sp. XZQH13. Curr Microbiol 2015; 70:859-64. [PMID: 25784540 DOI: 10.1007/s00284-015-0798-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 01/26/2015] [Indexed: 11/24/2022]
Abstract
Ansamycins is a group of type I polyketides characterized by the unique starter unit 3-amino-5-hydroxybenzoic acid. This family of secondary metabolites shows diverse biological activities, well-known members of which include rifamycin, geldanamycin, and maytansine. Previously, we isolated an AHBA synthase gene-positive strain Streptomyces sp. XZQH13 containing a "silent" ansamycin biosynthetic gene cluster ast. The constitutive expression of the Large-ATP-binding regulators of the LuxR family regulator gene astG1 located within the cluster triggered the expression of the biosynthetic genes. Reverse transcription-PCR experiments showed that the expression of the key biosynthetic genes, astB4, astD1, and astF1, was induced in the astG1 overexpression mutant compared to the wild type. This led to the isolation of two known ansatrienins, hydroxymycotrienin A (1) and thiazinotrienomycin G (2), which were identified by analysis of the mass spectral and NMR spectral data, from the mutant. These observations suggest that astG1 is probably a pathway-specific positive regulator for the biosynthesis of ansatrienin.
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Affiliation(s)
- Chao Xie
- State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan, 250100, People's Republic of China
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Song YN, Jiao RH, Zhang WJ, Zhao GY, Dou H, Jiang R, Zhang AH, Hou YY, Bi SF, Ge HM, Tan RX. New ansamycin derivatives generated by simultaneous mutasynthesis. Org Lett 2015; 17:556-9. [PMID: 25611625 DOI: 10.1021/ol5035639] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The conversion from triene- to diene-typed ansamycins is clarified step by step in Streptomyces seoulensis IFB-A01. Such an intertype convertibility is adopted to establish for the first time the simultaneous mutasynthesis of both types of C17-benzene ansamycins (C17BAs). Three of the newly generated unnatural compounds showed potent cytotoxicity.
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Affiliation(s)
- Ya Nan Song
- Institute of Functional Biomolecules, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University , Nanjing, 210093, China
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Bhoi MN, Borad MA, Patel HD. Synthetic Strategies for Fused Benzothiazoles: Past, Present, and Future. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.907426] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Manoj N. Bhoi
- a Department of Chemistry, School of Sciences , Gujarat University , Ahmedabad , India
| | - Mayuri A. Borad
- a Department of Chemistry, School of Sciences , Gujarat University , Ahmedabad , India
| | - Hitesh D. Patel
- a Department of Chemistry, School of Sciences , Gujarat University , Ahmedabad , India
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Shaaban KA, Wang X, Elshahawi SI, Ponomareva LV, Sunkara M, Copley GC, Hower JC, Morris AJ, Kharel MK, Thorson JS. Herbimycins D-F, ansamycin analogues from Streptomyces sp. RM-7-15. JOURNAL OF NATURAL PRODUCTS 2013; 76:1619-26. [PMID: 23947794 PMCID: PMC3852429 DOI: 10.1021/np400308w] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Bacterial strains belonging to the class actinomycetes were isolated from the soil near a thermal vent of the Ruth Mullins coal fire (Appalachian Mountains of eastern Kentucky). High-resolution electrospray ionization mass spectrometry and ultraviolet absorption profiles of metabolites from one of the isolates (Streptomyces sp. RM-7-15) revealed the presence of a unique set of metabolites ultimately determined to be herbimycins D-F (1-3). In addition, herbimycin A (4), dihydroherbimycin A (TAN 420E) (7), and the structurally distinct antibiotic bicycylomycin were isolated from the crude extract of Streptomyces sp. RM-7-15. Herbimycins A and D-F (1-3) displayed comparable binding affinities to the Hsp90α. While the new analogues were found to be inactive in cancer cell cytotoxicity and antimicrobial assays, they may offer new insights in the context of nontoxic ansamycin-based Hsp90 inhibitors for the treatment of neurodegenerative disease.
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Affiliation(s)
- Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | - Xiachang Wang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | - Sherif I. Elshahawi
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | - Manjula Sunkara
- Division of Cardiovascular Medicine, University of Kentucky, Lexington, KY 40536, United States
| | - Gregory C. Copley
- Center for Applied Energy Research, University of Kentucky, Lexington, KY, 40511, United States
| | - James C. Hower
- Center for Applied Energy Research, University of Kentucky, Lexington, KY, 40511, United States
| | - Andrew J. Morris
- Division of Cardiovascular Medicine, University of Kentucky, Lexington, KY 40536, United States
| | - Madan K. Kharel
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
- To whom correspondence should be addressed: ;
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
- To whom correspondence should be addressed: ;
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Hu Y, MacMillan JB. Erythrazoles A-B, cytotoxic benzothiazoles from a marine-derived Erythrobacter sp. Org Lett 2011; 13:6580-3. [PMID: 22106936 DOI: 10.1021/ol202944g] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chemical examination of an extract from an Erythrobacter sp. isolated from mangrove sediments yielded erythrazoles A (1) and B (2). The erythrazoles are of mixed biosynthetic origin containing a tetrasubstituted benzothiazole, an appended diterpene side chain, and a glycine unit. Erythrazole B is cytotoxic to a panel of non-small cell lung cancer (NSCLC) cell lines, with IC(50) values of 1.5, 2.5, and 6.8 μM against H1325, H2122, and HCC366, respectively.
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Affiliation(s)
- Youcai Hu
- Department of Biochemistry, Division of Chemistry, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA
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Le Bozec L, Moody CJ. Naturally Occurring Nitrogen–Sulfur Compounds. The Benzothiazole Alkaloids. Aust J Chem 2009. [DOI: 10.1071/ch09126] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Several alkaloids contain both nitrogen and sulfur, and a subset of these interesting terrestrial and marine natural products – the benzothiazoles – forms the subject of the present short review. Benzothiazole alkaloids are relatively rare in Nature, but they range in structural complexity from benzothiazole itself and simple derivatives thereof, through the well-known firefly luciferin, to more complex molecules such as the thiazo-rifamycins and the dercitin-kuanoniamine family. Although the biosynthesis of benzothiazoles has not been studied in many cases, the evidence suggests that they are derived from cysteine addition to benzoquinone derivatives followed by ring contraction of the resulting benzothiazine adducts. The review also highlights the fact that little synthetic work has been done on benzothiazole-containing natural products.
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SAR study of a novel triene-ansamycin group compound, quinotrierixin, and related compounds, as inhibitors of ER stress-induced XBP1 activation. J Antibiot (Tokyo) 2008; 61:312-7. [PMID: 18653997 DOI: 10.1038/ja.2008.44] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Four novel triene-ansamycin group compounds, quinotrierixin, demethyltrienomycin A, demethyltrienomycin B and demethyltrienomycinol, were isolated from the culture broth of Streptomyces sp. PAE37 as inhibitors of ER stress-induced XBP1 activation. The structures of quinotrierixin, demethyltrienomycin A, demethyltrienomycin B and demethyltrienomycinol were determined on the basis of their spectroscopical and chemical properties. All of four possessed 21-membered macrocyclic lactams including triene moieties.
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