1
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Jacobtorweihen J, Obaidi I, Sherlock L, Sheridan H, Spiegler V. A new lanosyl guanidine from Vertebrata lanosa with anti-inflammatory activity. Nat Prod Res 2024:1-7. [PMID: 38206887 DOI: 10.1080/14786419.2024.2301759] [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: 09/05/2023] [Accepted: 12/30/2023] [Indexed: 01/13/2024]
Abstract
N-Lanosyl guanidine (1), a new bromophenol containing a guanidine moiety was isolated from the red alga Vertebrata lanosa (L.) T.A. Christensen, which is frequently used for cosmetic purposes. Structure elucidation was performed by means of mass spectrometry as well as 1D and 2D NMR spectroscopy. Due to its structural features, 1 might share a common biosynthetic route with known bromophenolic ureido derivatives. Regarding potential bioactivities, 1 has shown clear anti-inflammatory properties, reducing cytokine release in lipopolysaccharide-stimulated phorbol 12-myristate 13-acetate-differentiated THP-1 macrophages. No signs of toxicity were observed, in either the cell line nor in the nematode Caenorhabditis elegans. However, 1 was inactive against the gram-negative bacterium Pseudomonas aeruginosa.
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Affiliation(s)
- Joshua Jacobtorweihen
- Institute for Pharmaceutical Biology and Phytochemistry, University of Münster, Münster, Germany
| | - Ismael Obaidi
- NatPro Centre for Natural Products Research, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin, Ireland
- College of Pharmacy, University of Babylon, Babylon, Iraq
| | - Lee Sherlock
- NatPro Centre for Natural Products Research, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin, Ireland
| | - Helen Sheridan
- NatPro Centre for Natural Products Research, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin, Ireland
| | - Verena Spiegler
- Institute for Pharmaceutical Biology and Phytochemistry, University of Münster, Münster, Germany
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2
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Doan TP, Park EJ, Ryu B, Cho HM, Yoon SJ, Jung GY, Thuong PT, Oh WK. Unique guanidine-conjugated catechins from the leaves of Alchornea rugosa and their autophagy modulating activity. PHYTOCHEMISTRY 2023; 206:113521. [PMID: 36435211 DOI: 10.1016/j.phytochem.2022.113521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 06/16/2023]
Abstract
Natural guanidines, molecules that contain the guanidine moiety, are structurally unique and often exhibit potent biological activities. A phytochemical investigation of the leaves of Alchornea rugosa (Lour.) Müll.Arg. by MS/MS-based molecular networking revealed eight undescribed guanidine-flavanol conjugates named rugonines A-H. The chemical structures of the isolated compounds were comprehensively elucidated by NMR spectroscopy, HRESIMS, and circular dichroism (CD) analysis. All isolated compounds were tested for autophagosome formation in HEK293 cells stably expressing GFP-LC3. The results revealed that compounds rugonines D-G showed potential autophagy inhibitory activity.
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Affiliation(s)
- Thi-Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Eun-Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyo-Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang-Jun Yoon
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Gwan-Young Jung
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Phuong-Thien Thuong
- Division of Herbal Products, Vietnam-Korea Institute of Science and Technology, Hanoi, 10055, Viet Nam; School of Pharmacy, Haiphong University of Medicine and Pharmacy, Ngo Quyen, Haiphong, 04212, Viet Nam
| | - Won-Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea.
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3
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Gémes N, Makra Z, Neuperger P, Szabó E, Balog JÁ, Flink LB, Kari B, Hackler L, Puskás LG, Kanizsai I, Szebeni GJ. A cytotoxic survey on
2‐amino‐1H‐imidazol
based synthetic marine sponge alkaloid analogues. Drug Dev Res 2022; 83:1906-1922. [PMID: 36322473 PMCID: PMC10091778 DOI: 10.1002/ddr.22006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/23/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022]
Abstract
Here, we describe the synthesis and biologic activity evaluation of 20 novel synthetic marine sponge alkaloid analogues with 2-amino-1H-imidazol (2-AI) core. Cytotoxicity was tested on murine 4T1 breast cancer, A549 human lung cancer, and HL-60 human myeloid leukemia cells by the resazurin assay. A total of 18 of 20 compounds showed cytotoxic effect on the cancer cell lines with different potential. Viability of healthy human fibroblasts and peripheral blood mononuclear cells upon treatment was less hampered compared to cancer cell lines supporting tumor cell specific cytotoxicity of our compounds. The most cytotoxic compounds resulted the following IC50 values 28: 2.91 µM on HL-60 cells, and 29: 3.1 µM on 4T1 cells. The A549 cells were less sensitive to the treatments with IC50 15 µM for both 28 and 29. Flow cytometry demonstrated the apoptotic effect of the most active seven compounds inducing phosphatidylserine exposure and sub-G1 fragmentation of nuclear DNA. Cell cycle arrest was also observed. Four compounds caused depolarization of the mitochondrial membrane potential as an early event of apoptosis. Two lead compounds inhibited tumor growth in vivo in the 4T1 triple negative breast cancer and A549 human lung adenocarcinoma xenograft models. Novel marine sponge alkaloid analogues are demonstrated as potential anticancer agents for further development.
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Affiliation(s)
- Nikolett Gémes
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
- PhD School in Biology University of Szeged Szeged Hungary
| | | | - Patrícia Neuperger
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
| | - Enikő Szabó
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
| | - József Á. Balog
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
| | - Lili Borbála Flink
- Department of Dermatology and Allergology University of Szeged Szeged Hungary
| | | | | | - László. G. Puskás
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
- Avidin Ltd Szeged Hungary
| | | | - Gábor J. Szebeni
- Laboratory of Functional Genomics Biological Research Centre Szeged Hungary
- Department of Physiology, Anatomy, and Neuroscience, Faculty of Science and Informatics University of Szeged Szeged Hungary
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4
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Super/hyperbasicity of novel diquinonimino derivatives of guanidine in gas phase. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Li Q, Fang X, Pan R, Yao H, Lin A. Palladium-Catalyzed Asymmetric Sequential Hydroamination of 1,3-Enynes: Enantioselective Syntheses of Chiral Imidazolidinones. J Am Chem Soc 2022; 144:11364-11376. [PMID: 35687857 DOI: 10.1021/jacs.2c03620] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Pd-catalyzed sequential hydroamination of readily available 1,3-enynes is reported. The redox-neutral process provides an efficient route to synthesize a broad scope of imidazolidinones, thiadiazolidines, and imidazolidines. Asymmetric sequential hydroamination generates a series of synthetically valuable, enantioenriched imidazolidinones. Mechanistic studies revealed that the transformation occurred via an intermolecular enyne hydroamination pathway to give an allene intermediate. Subsequent intramolecular hydroamination of the allene intermediate proceeded under the Curtin-Hammett principle to provide enantioenriched imidazolidinone products.
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Affiliation(s)
- Qiuyu Li
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Xinxin Fang
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Rui Pan
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
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6
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Synthesis and Theoretical Study of New Guanylated Cyclophosphazenes and Their Use in the CO2 Fixation into Styrene Carbonate. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02264-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Doan TP, Park EJ, Cho HM, Ryu B, Lee BW, Thuong PT, Oh WK. Rugonidines A-F, Diastereomeric 1,6-Dioxa-7,9-diazaspiro[4.5]dec-7-en-8-amines from the Leaves of Alchornea rugosa. JOURNAL OF NATURAL PRODUCTS 2021; 84:3055-3063. [PMID: 34797989 DOI: 10.1021/acs.jnatprod.1c00785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Rugonidines A-F (1-6), three pairs of novel configurationally semistable diastereomers featuring an unprecedented 1,6-dioxa-7,9-diazaspiro[4.5]dec-7-en-8-amine scaffold, were isolated from Alchornea rugosa based on MS/MS-based molecular networking analysis. Their structures were elucidated by NMR spectroscopy in combination with quantum-chemical calculations. Compounds 1-3 showed a significant increase in glucose uptake level in differentiated 3T3-L1 adipocytes using 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl)amino]-d-glucose (2-NBDG) as a fluorescent-tagged glucose probe.
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Affiliation(s)
- Thi-Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun-Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo-Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Ba-Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Phuong-Thien Thuong
- Division of Herbal Products, Vietnam-Korea Institute of Science and Technology, Hanoi 10055, Vietnam
- School of Pharmacy, Haiphong University of Medicine and Pharmacy, Ngo Quyen, Haiphong 04212, Vietnam
| | - Won-Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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8
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Geissler AGA, Riesterer JR, Breit B. Stereodivergent Palladium- and Rhodium-Catalyzed Intramolecular Addition of Tosylureas to Allenes: Diastereoselective Synthesis of Tetrahydropyrimidinones. Org Lett 2021; 23:9168-9172. [PMID: 34806888 DOI: 10.1021/acs.orglett.1c03482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The intramolecular addition of tosylureas to allenes is highly syn-/anti-diastereoselective when employing a palladium or rhodium-based catalytic system and affords 1,3-cyclic ureas. Under palladium catalysis a range of thermodynamic anti-tetrahydropyrimidinones are accessible, while rhodium catalysis allows synthesis of the kinetic syn-tetrahydropyrimidinones. For a representative scope of substrates both cyclic ureas were obtained in excellent yields and diastereoselectivities. The obtained tetrahydropyrimidinones were shown to be easily deprotected and modified to demonstrate the synthetic value.
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Affiliation(s)
- Arne G A Geissler
- Institute of Organic Chemistry, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
| | - Jasmin R Riesterer
- Institute of Organic Chemistry, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
| | - Bernhard Breit
- Institute of Organic Chemistry, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
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9
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Wang CC, Qu YL, Liu XH, Ma ZW, Yang B, Liu ZJ, Chen XP, Chen YJ. Synthesis of Five-Membered Cyclic Guanidines via Cascade [3 + 2] Cycloaddition of α-Haloamides with Organo-cyanamides. J Org Chem 2021; 86:3546-3554. [PMID: 33538590 DOI: 10.1021/acs.joc.0c02932] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The convenient preparation of N2-unprotected five-membered cyclic guanidines was achieved through a cascade [3 + 2] cycloaddition between organo-cyanamides and α-haloamides under mild conditions in good to excellent yields (up to 99%). The corresponding cyclic guanidines could be easily transformed into hydantoins via hydrolysis.
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Affiliation(s)
- Chuan-Chuan Wang
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China.,College of Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Ya-Li Qu
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Xue-Hua Liu
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Zhi-Wei Ma
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Bo Yang
- College of Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Zhi-Jing Liu
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Xiao-Pei Chen
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Ya-Jing Chen
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
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10
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Ghirga F, Quaglio D, Mori M, Cammarone S, Iazzetti A, Goggiamani A, Ingallina C, Botta B, Calcaterra A. A unique high-diversity natural product collection as a reservoir of new therapeutic leads. Org Chem Front 2021. [DOI: 10.1039/d0qo01210f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We review the successful application of computer-aided methods to screen a unique and high-diversity in house collection library composed of around 1000 individual natural products.
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Affiliation(s)
- Francesca Ghirga
- Center For Life Nano Science@Sapienza
- Istituto Italiano di Tecnologia
- 00161 Rome
- Italy
| | - Deborah Quaglio
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Mattia Mori
- Department of Biotechnology
- Chemistry and Pharmacy
- “Department of Excellence 2018–2022”
- University of Siena
- 53100 Siena
| | - Silvia Cammarone
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Antonia Iazzetti
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Antonella Goggiamani
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Cinzia Ingallina
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Bruno Botta
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
| | - Andrea Calcaterra
- Department of Chemistry and Technology of Drugs
- “Department of Excellence 2018–2022”
- The Sapienza University of Rome
- 00185 Rome
- Italy
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11
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Makra Z, Bényei A, Puskás LG, Kanizsai I. One‐Pot Access towards 4,5‐Disubstituted 2‐Amino‐1
H
‐imidazoles Starting from Mannich Substrates and their Transformation Utilities. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zsófia Makra
- AVIDIN Ltd. Alsó kiköt– sor 11/D 6726 Szeged Hungary
| | - Attila Bényei
- Department of Physical Chemistry Laboratory for X‐ray Diffraction University of Debrecen Egyetem tér 1 4032 Debrecen Hungary
| | | | - Iván Kanizsai
- AVIDIN Ltd. Alsó kiköt– sor 11/D 6726 Szeged Hungary
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12
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Bokhtia RM, Panda SS, Girgis AS, Pillai GG, Ibrahim TS, Shalaby EM, Gigli L, Abdel‐Aal EH, Al‐Mahmoudy AMM. Efficient Synthesis and Computational Studies of Useful Guanylating Agents: 1
H
‐Benzotriazole‐1‐carboximidamides. ChemistrySelect 2020. [DOI: 10.1002/slct.202003796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Riham M. Bokhtia
- Department of Chemistry & Physics Augusta University 1120 15th Street Augusta GA 30912 USA
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy Zagazig University Zagazig, 44519 Egypt
| | - Siva S. Panda
- Department of Chemistry & Physics Augusta University 1120 15th Street Augusta GA 30912 USA
| | - Adel S. Girgis
- Department of Pesticide Chemistry National Research Centre Dokki Giza 12622 Egypt
| | | | - Tarek S. Ibrahim
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy Zagazig University Zagazig, 44519 Egypt
- Department of Pharmaceutical Chemistry King Abdulaziz University Jeddah 21589 Saudi Arabia
| | - ElSayed M. Shalaby
- X-Ray Crystallography Lab. Physics Division National Research Centre Dokki Giza 12622 Egypt
| | - Lara Gigli
- Elettra-Sincrotrone Trieste s.s. 14 Km 163.5 in Area Science Park, Basovizza Trieste 34149 Italy
| | - Eatedal H. Abdel‐Aal
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy Zagazig University Zagazig, 44519 Egypt
| | - Amany M. M. Al‐Mahmoudy
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy Zagazig University Zagazig, 44519 Egypt
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13
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Berlinck RGS, Bernardi DI, Fill T, Fernandes AAG, Jurberg ID. The chemistry and biology of guanidine secondary metabolites. Nat Prod Rep 2020; 38:586-667. [PMID: 33021301 DOI: 10.1039/d0np00051e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Covering: 2017-2019Guanidine natural products isolated from microorganisms, marine invertebrates and terrestrial plants, amphibians and spiders, represented by non-ribosomal peptides, guanidine-bearing polyketides, alkaloids, terpenoids and shikimic acid derived, are the subject of this review. The topics include the discovery of new metabolites, total synthesis of natural guanidine compounds, biological activity and mechanism-of-action, biosynthesis and ecological functions.
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Affiliation(s)
- Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
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14
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Sui X, Huang G, Ezzat N, Yuan Y. A concise and scalable synthesis of a novel l-allo-enduracididine derivative. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Chou H, Leow D, Tan C. Recent Advances in Chiral Guanidine‐Catalyzed Enantioselective Reactions. Chem Asian J 2019; 14:3803-3822. [DOI: 10.1002/asia.201901183] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/27/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Hsiao‐Chieh Chou
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Dasheng Leow
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Choon‐Hong Tan
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
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16
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Rong HJ, Yang CF, Chen T, Wang YQ, Ning BK. Synthesis of guanidines via the I2 mediated desulfurization of N,N′-di-Boc-thiourea. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Ding R, Chen H, Xu Y, Tang H, Chen Y, Pan Y. Photoinduced Cascade Reaction of Tertiary Amines with Sulfonyl Azides: Synthesis of Amidine Derivatives. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900359] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rui Ding
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of GuangxiNormal University Guilin 541004 People's Republic of China
| | - Hui Chen
- Pharmacy SchoolGuilin Medical University Guilin 541004 People's Republic of China
| | - Yan‐Li Xu
- Pharmacy SchoolGuilin Medical University Guilin 541004 People's Republic of China
| | - Hai‐Tao Tang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of GuangxiNormal University Guilin 541004 People's Republic of China
| | - Yan‐Yan Chen
- Pharmacy SchoolGuilin Medical University Guilin 541004 People's Republic of China
| | - Ying‐Ming Pan
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of GuangxiNormal University Guilin 541004 People's Republic of China
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18
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Kamaruzzaman NF, Tan LP, Hamdan RH, Choong SS, Wong WK, Gibson AJ, Chivu A, Pina MDF. Antimicrobial Polymers: The Potential Replacement of Existing Antibiotics? Int J Mol Sci 2019; 20:E2747. [PMID: 31167476 PMCID: PMC6600223 DOI: 10.3390/ijms20112747] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/08/2019] [Accepted: 04/11/2019] [Indexed: 12/22/2022] Open
Abstract
Antimicrobial resistance is now considered a major global challenge; compromising medical advancements and our ability to treat infectious disease. Increased antimicrobial resistance has resulted in increased morbidity and mortality due to infectious diseases worldwide. The lack of discovery of novel compounds from natural products or new classes of antimicrobials, encouraged us to recycle discontinued antimicrobials that were previously removed from routine use due to their toxicity, e.g., colistin. Since the discovery of new classes of compounds is extremely expensive and has very little success, one strategy to overcome this issue could be the application of synthetic compounds that possess antimicrobial activities. Polymers with innate antimicrobial properties or that have the ability to be conjugated with other antimicrobial compounds create the possibility for replacement of antimicrobials either for the direct application as medicine or implanted on medical devices to control infection. Here, we provide the latest update on research related to antimicrobial polymers in the context of ESKAPE (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.) pathogens. We summarise polymer subgroups: compounds containing natural peptides, halogens, phosphor and sulfo derivatives and phenol and benzoic derivatives, organometalic polymers, metal nanoparticles incorporated into polymeric carriers, dendrimers and polymer-based guanidine. We intend to enhance understanding in the field and promote further work on the development of polymer based antimicrobial compounds.
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Affiliation(s)
- Nor Fadhilah Kamaruzzaman
- Faculty of Veterinary Medicine, Locked bag 36, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Li Peng Tan
- Faculty of Veterinary Medicine, Locked bag 36, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Ruhil Hayati Hamdan
- Faculty of Veterinary Medicine, Locked bag 36, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Siew Shean Choong
- Faculty of Veterinary Medicine, Locked bag 36, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Weng Kin Wong
- School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia.
| | - Amanda Jane Gibson
- Royal Veterinary College, Pathobiology and Population Sciences, Hawkshead Lane, North Mymms, Hatfield AL9 7TA, UK.
| | - Alexandru Chivu
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London NW3 2PF, UK.
| | - Maria de Fatima Pina
- Medicines and Healthcare Regulatory Products Agency, 10 South Colonnade, Canary Wharf, London E14 4PU, UK.
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19
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do Espírito Santo RD, Velásquez ÁMA, Passianoto LVG, Sepulveda AAL, da Costa Clementino L, Assis RP, Baviera AM, Kalaba P, Dos Santos FN, Éberlin MN, da Silva GVJ, Zehl M, Lubec G, Graminha MAS, González ERP. N, N', N″-trisubstituted guanidines: Synthesis, characterization and evaluation of their leishmanicidal activity. Eur J Med Chem 2019; 171:116-128. [PMID: 30913526 DOI: 10.1016/j.ejmech.2019.03.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 02/03/2023]
Abstract
Leishmaniasis is a group of diseases caused by protozoan parasites from the genus Leishmania. There are estimated 1.3 million new cases annually with a mortality of 20,000-30,000 per year, when patients are left untreated. Current chemotherapeutic drugs available present high toxicity and low efficacy, the latter mainly due to the emergence of drug-resistant parasites, which makes discovery of novel, safe, and efficacious antileishmanial drugs mandatory. The present work reports the synthesis, characterization by ESI-MS, 1H and 13C NMR, and FTIR techniques as well as in vitro and in vivo evaluation of leishmanicidal activity of guanidines derivatives presenting lower toxicity. Among ten investigated compounds, all being guanidines containing a benzoyl, a benzyl, and a substituted phenyl moiety, LQOF-G2 (IC50-ama 5.6 μM; SI = 131.8) and LQOF-G7 (IC50-ama 7.1 μM; SI = 87.1) were the most active against L. amazonensis intracellular amastigote, showing low cytotoxicity to the host cells according to their selectivity index. The most promising compound, LQOF-G2, was further evaluated in an in vivo model and was able to decrease 60% of the parasite load in foot lesions at a dose of 0.25 mg/kg/day. Moreover, this guanidine derivative demonstrated reduced hepatotoxicity compared to other leishmanicidal compounds and did not show nephrotoxicity, as determined by the analyses of biomarkers of hepatic damage and renal function, which make this compound a potential new hit for therapy against leishmaniasis.
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Affiliation(s)
- Rafael Dias do Espírito Santo
- Laboratório de Química Orgânica Fina, Departamento de Química e Biologia, Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista - UNESP, Campus de Presidente Prudente, Rua Roberto Simonsen, 305, 19060-900, Presidente Prudente, SP, Brazil; Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Universidade Estadual Paulista - UNESP, São Paulo, Brazil
| | - Ángela María Arenas Velásquez
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil
| | - Luana Vitorino Gushiken Passianoto
- Laboratório de Química Orgânica Fina, Departamento de Química e Biologia, Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista - UNESP, Campus de Presidente Prudente, Rua Roberto Simonsen, 305, 19060-900, Presidente Prudente, SP, Brazil; Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Universidade Estadual Paulista - UNESP, São Paulo, Brazil
| | - Alex Arbey Lopera Sepulveda
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil
| | - Leandro da Costa Clementino
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil
| | - Renata Pires Assis
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil
| | - Amanda Martins Baviera
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil
| | - Predrag Kalaba
- Department of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna, Althanstraße 14, 1090, Vienna, Austria
| | - Fábio Neves Dos Santos
- Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade de Campinas - UNICAMP, Campinas, 13083-970, SP, Brazil
| | - Marcos Nogueira Éberlin
- Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade de Campinas - UNICAMP, Campinas, 13083-970, SP, Brazil
| | - Gil Valdo José da Silva
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo - USP, Avenida dos Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Martin Zehl
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Gert Lubec
- Department of Neuroproteomics, Paracelsus Medical University, Salzburg, Austria
| | - Márcia Aparecida Silva Graminha
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista - UNESP, Campus de Araraquara, Rodovia Araraquara-Jaú, km1, 14800-903, Araraquara, SP, Brazil.
| | - Eduardo René Pérez González
- Laboratório de Química Orgânica Fina, Departamento de Química e Biologia, Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista - UNESP, Campus de Presidente Prudente, Rua Roberto Simonsen, 305, 19060-900, Presidente Prudente, SP, Brazil; Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Universidade Estadual Paulista - UNESP, São Paulo, Brazil.
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20
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Berlinck RGS, Monteiro AF, Bertonha AF, Bernardi DI, Gubiani JR, Slivinski J, Michaliski LF, Tonon LAC, Venancio VA, Freire VF. Approaches for the isolation and identification of hydrophilic, light-sensitive, volatile and minor natural products. Nat Prod Rep 2019; 36:981-1004. [DOI: 10.1039/c9np00009g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Water-soluble, volatile, minor and photosensitive natural products are yet poorly known, and this review discusses the literature reporting the isolation strategies for some of these metabolites.
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Affiliation(s)
| | - Afif F. Monteiro
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Ariane F. Bertonha
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Darlon I. Bernardi
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Juliana R. Gubiani
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Juliano Slivinski
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | | | | | - Victor A. Venancio
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Vitor F. Freire
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
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21
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Rong HJ, Yang CF, Chen T, Xu ZG, Su TD, Wang YQ, Ning BK. Iodine-catalyzed guanylation of amines withN,N′-di-Boc-thiourea. Org Biomol Chem 2019; 17:9280-9283. [DOI: 10.1039/c9ob02014d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Iodine-catalyzed guanylation of amines withN,N′-di-Boc-thiourea is especially useful for both electronically and sterically deactivated primary anilines.
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Affiliation(s)
- Hao-Jie Rong
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
- Department of Chemistry & Materials Science
- Northwest University
| | - Cui-Feng Yang
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
| | - Tao Chen
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
| | - Ze-Gang Xu
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
| | - Tian-Duo Su
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
| | - Yong-Qiang Wang
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Bin-Ke Ning
- Modern Chemistry Research Institute of Xi'an
- Xi'an 710065
- China
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an 710065
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22
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Hura N, Sawant AV, Kumari A, Guchhait SK, Panda D. Combretastatin-Inspired Heterocycles as Antitubulin Anticancer Agents. ACS OMEGA 2018; 3:9754-9769. [PMID: 31459105 PMCID: PMC6644768 DOI: 10.1021/acsomega.8b00996] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 08/09/2018] [Indexed: 06/10/2023]
Abstract
Combretastatin (CA-4) and its analogues are undergoing several clinical trials for treating different types of tumors. In this work, the antiproliferative activity of a series of 2-aminoimidazole-carbonyl analogs of clinically relevant combretastatins A-4 (CA-4) and A-1 was evaluated using a cell-based assay. Among the compounds tested, C-13 and C-21 displayed strong antiproliferative activities against HeLa cells. C-13 inhibited the proliferation of lung carcinoma (A549) cells more potently than combretastatin A-4. C-13 also retarded the migration of A549 cells. Interestingly, C-13 displayed much stronger antiproliferative effects against breast carcinoma and skin melanoma cells compared to noncancerous breast epithelial and skin fibroblast cells. C-13 strongly disassembled cellular microtubules, perturbed the localization of EB1 protein, inhibited mitosis in cultured cells, and bound to tubulin at the colchicine site and inhibited the polymerization of reconstituted microtubules in vitro. C-13 treatment increased the level of reactive oxygen species and induced apoptosis via poly(ADP-ribose) polymerase-cleavage in HeLa cells. The results revealed the importance of the 2-aminoimidazole-carbonyl motif as a double bond replacement in combretastatin and indicated a pharmacodynamically interesting pattern of H-bond acceptors/donors and requisite syn-templated aryls.
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Affiliation(s)
- Neha Hura
- Department
of Medicinal Chemistry, National Institute
of Pharmaceutical Education and Research (NIPER), S. A. S. Nagar, Mohali, Punjab 160062, India
| | - Avishkar V. Sawant
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Bombay, Mumbai 400076, India
| | - Anuradha Kumari
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Bombay, Mumbai 400076, India
| | - Sankar K. Guchhait
- Department
of Medicinal Chemistry, National Institute
of Pharmaceutical Education and Research (NIPER), S. A. S. Nagar, Mohali, Punjab 160062, India
| | - Dulal Panda
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Bombay, Mumbai 400076, India
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23
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Wu J, Kong Y, Liu L, Chang W, Li J. Metal-free multicomponent cascade reactions of homopropargylic amines and acyl chlorides as well as potassium thiocyanate and diiodine: an access to thiazine imides. Org Biomol Chem 2018; 16:5955-5959. [PMID: 30087977 DOI: 10.1039/c8ob01557k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel metal-free multicomponent cascade reaction was developed for the construction of thiazine imides. This four-component cascade reaction had advantages of mild reaction conditions, wide substrate scope and good atom economy. Four new bonds were formed in one pot via a 6-exo-dig iodothiolation cyclization of homopropargylic amines. The corresponding E-configurational thiazine imide products possess an exocyclic vinyliodide functional group.
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Affiliation(s)
- Jing Wu
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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24
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Matsumura K, Taniguchi T, Reimer JD, Noguchi S, Fujita MJ, Sakai R. KB343, a Cyclic Tris-guanidine Alkaloid from Palauan Zoantharian Epizoanthus illoricatus. Org Lett 2018; 20:3039-3043. [DOI: 10.1021/acs.orglett.8b01069] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ken Matsumura
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 minato-cho, Hakodate, Hokkaido 041-8611, Japan
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan
| | - James D. Reimer
- University of the Ryukyus Senbaru 1, Nishihara, Okinawa 903-0213, Japan
| | - Shuntaro Noguchi
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 minato-cho, Hakodate, Hokkaido 041-8611, Japan
| | - Masaki J. Fujita
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 minato-cho, Hakodate, Hokkaido 041-8611, Japan
| | - Ryuichi Sakai
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 minato-cho, Hakodate, Hokkaido 041-8611, Japan
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25
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Synthesis of N -Sulfonylformamidines by tert -butyl Hydroperoxide–Promoted, metal-free, direct oxidative dehydrogenation of aliphatic amines. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.074] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Economou C, Romaire JP, Scott TZ, Parr BT, Herzon SB. A convergent approach to batzelladine alkaloids. Total syntheses of (+)-batzelladine E, (-)-dehydrobatzelladine C, and (+)-batzelladine K. Tetrahedron 2018; 74:3188-3197. [PMID: 33911315 DOI: 10.1016/j.tet.2018.04.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We recently reported a convergent strategy to access the polycyclic guanidinium alkaloid (+)-batzelladine B via an aldol addition-retro-aldol-aza-Michael addition cascade. Here we describe the application of this approach toward the total syntheses of (+)-batzelladine E, (-)-dehydrobatzelladine C, and (+)-batzelladine K. The identification of suitable methods to functionalize a common tropane core by electrophilic alkynylation and nucleophilic 1,2-addition were essential to generalizing this approach. We provide evidence for the intermediacy of an acylallene species in the cascade reaction.
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Affiliation(s)
- Christos Economou
- Department of Chemistry, Yale University, New Haven, CT 06520, United States
| | - Justin P Romaire
- Department of Chemistry, Yale University, New Haven, CT 06520, United States
| | - Tony Z Scott
- Department of Chemistry, Yale University, New Haven, CT 06520, United States
| | - Brendan T Parr
- Department of Chemistry, Yale University, New Haven, CT 06520, United States
| | - Seth B Herzon
- Department of Chemistry, Yale University, New Haven, CT 06520, United States.,Department of Pharmacology, Yale School of Medicine, New Haven, CT 06520, United States
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27
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Shrestha S, Sorolla A, Fromont J, Blancafort P, Flematti GR. Crambescidin 800, Isolated from the Marine Sponge Monanchora viridis, Induces Cell Cycle Arrest and Apoptosis in Triple-Negative Breast Cancer Cells. Mar Drugs 2018; 16:E53. [PMID: 29419736 PMCID: PMC5852481 DOI: 10.3390/md16020053] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/22/2018] [Accepted: 01/31/2018] [Indexed: 12/31/2022] Open
Abstract
Triple negative breast cancer (TNBC) is currently the only group of breast cancers without an effective targeted therapy. Marine sponges have historically been a source of compounds with anticancer activity. In this study, we screened extracts from twenty marine sponges collected off the coast of Western Australia for cytotoxic activity against TNBC cells. One very active extract derived from the sponge Monanchora viridis was selected for bioactivity-guided fractionation. Through multiple steps of purification, we isolated a potent cytotoxic compound, which was identified as crambescidin 800 (C800). We found that C800 exhibited cytotoxic potency in a panel of breast cancer cells, of which TNBC and luminal cancer cell models were the most sensitive. In addition, C800 induced cell cycle arrest at the G2/M phase, resulting in a decline in the expression of cyclin D1, CDK4, and CDK6 in TNBC cells. This effect was associated with the inhibition of phosphorylation of Akt, NF-κB, and MAPK pathways, resulting in apoptosis in TNBC cells.
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Affiliation(s)
- Sumi Shrestha
- School of Molecular Sciences, The University of Western Australia, Crawley 6009, Western Australia, Australia.
- Cancer Epigenetics, Harry Perkins Institute of Medical Research, QEII Medical Centre and Centre for Medical Research, The University of Western Australia, Crawley 6009, Western Australia, Australia.
| | - Anabel Sorolla
- Cancer Epigenetics, Harry Perkins Institute of Medical Research, QEII Medical Centre and Centre for Medical Research, The University of Western Australia, Crawley 6009, Western Australia, Australia.
| | - Jane Fromont
- Western Australian Museum, Welshpool 6106, Western Australia, Australia.
| | - Pilar Blancafort
- Cancer Epigenetics, Harry Perkins Institute of Medical Research, QEII Medical Centre and Centre for Medical Research, The University of Western Australia, Crawley 6009, Western Australia, Australia.
| | - Gavin R Flematti
- School of Molecular Sciences, The University of Western Australia, Crawley 6009, Western Australia, Australia.
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28
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Esteves H, Brito TO, Ribeiro-Viana R, de Fátima Â, Macedo F. Tert
-butyl hydroperoxide-promoted guanylation of amines with benzoylthioureas: Mechanistic insights by HRMS and 1
H NMR. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Henrique Esteves
- Departamento de Química; Universidade Estadual de Londrina; Rod. Celso Garcia Cid, km. 380, Londrina Paraná 86057-970 Brazil
| | - Tiago Oliveira Brito
- Departamento de Química; Universidade Estadual de Londrina; Rod. Celso Garcia Cid, km. 380, Londrina Paraná 86057-970 Brazil
| | - Renato Ribeiro-Viana
- Departamento de Química; Universidade Estadual de Londrina; Rod. Celso Garcia Cid, km. 380, Londrina Paraná 86057-970 Brazil
| | - Ângelo de Fátima
- Departamento de Química; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Belo Horizonte Minas Gerais 31270-901 Brazil
| | - Fernando Macedo
- Departamento de Química; Universidade Estadual de Londrina; Rod. Celso Garcia Cid, km. 380, Londrina Paraná 86057-970 Brazil
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29
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Guchhait SK, Hura N, Shah AP. Synthesis of Polysubstituted 2-Aminoimidazoles via Alkene-Diamination of Guanidine with Conjugated α-Bromoalkenones. J Org Chem 2017; 82:2745-2752. [PMID: 28195472 DOI: 10.1021/acs.joc.6b03021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A step-economical access to polysubstituted aminoimidazoles has been accomplished via alkene vicinal C-N bonds formation of 2-bromo-2-alkenones with guanidine avoiding its NH-protection/derivatization prerequisite for electronic modulation. The approach has excellent substrate scope, is amenable to diverse guanidine-containing substrates, and introduces distinctive substitutions/functionalities into aminoimidazole core. It is also applicable to preparation of fused-imidazoles. The reaction involves a tandem pathway of aza-Michael addition, SN2, and a unique redox-neutral process, as evident by spectroscopic study and control experiments.
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Affiliation(s)
- Sankar K Guchhait
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
| | - Neha Hura
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
| | - Archana P Shah
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
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30
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Guanidine Alkaloids from the Marine Sponge Monanchora pulchra Show Cytotoxic Properties and Prevent EGF-Induced Neoplastic Transformation in Vitro. Mar Drugs 2016; 14:md14070133. [PMID: 27428983 PMCID: PMC4962023 DOI: 10.3390/md14070133] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/05/2016] [Accepted: 07/08/2016] [Indexed: 12/13/2022] Open
Abstract
Guanidine alkaloids from sponges Monanchora spp. represent diverse bioactive compounds, however, the mechanisms underlying bioactivity are very poorly understood. Here, we report results of studies on cytotoxic action, the ability to inhibit EGF-induced neoplastic transformation, and the effects on MAPK/AP-1 signaling of eight rare guanidine alkaloids, recently isolated from the marine sponge Monanchora pulchra, namely: monanchocidin A (1), monanchocidin B (2), monanchomycalin C (3), ptilomycalin A (4), monanchomycalin B (5), normonanchocidin D (6), urupocidin A (7), and pulchranin A (8). All of the compounds induced cell cycle arrest (apart from 8) and programmed death of cancer cells. Ptilomycalin A-like compounds 1–6 activated JNK1/2 and ERK1/2, following AP-1 activation and caused p53-independent programmed cell death. Compound 7 induced p53-independent cell death without activation of AP-1 or caspase-3/7, and the observed JNK1/2 activation did not contribute to the cytotoxic effect of the compound. Alkaloid 8 induced JNK1/2 (but not ERK1/2) activation leading to p53-independent cell death and strong suppression of AP-1 activity. Alkaloids 1–4, 7, and 8 were able to inhibit the EGF-induced neoplastic transformation of JB6 P+ Cl41 cells. Our results suggest that investigated guanidine marine alkaloids hold potential to eliminate human cancer cells and prevent cancer cell formation and spreading.
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31
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Giltrap AM, Dowman LJ, Nagalingam G, Ochoa JL, Linington RG, Britton WJ, Payne RJ. Total Synthesis of Teixobactin. Org Lett 2016; 18:2788-91. [DOI: 10.1021/acs.orglett.6b01324] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | | | | | - Jessica L. Ochoa
- Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| | - Roger G. Linington
- Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia BC V5A 1S6, Canada
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32
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Sfecci E, Lacour T, Amade P, Mehiri M. Polycyclic Guanidine Alkaloids from Poecilosclerida Marine Sponges. Mar Drugs 2016; 14:E77. [PMID: 27070629 PMCID: PMC4849081 DOI: 10.3390/md14040077] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/26/2016] [Accepted: 04/01/2016] [Indexed: 01/09/2023] Open
Abstract
Sessile marine sponges provide an abundance of unique and diversified scaffolds. In particular, marine guanidine alkaloids display a very wide range of biological applications. A large number of cyclic guanidine alkaloids, including crambines, crambescins, crambescidins, batzelladines or netamins have been isolated from Poecilosclerida marine sponges. In this review, we will explore the chemodiversity of tri- and pentacyclic guanidine alkaloids. NMR and MS data tools will also be provided, and an overview of the wide range of bioactivities of crambescidins and batzelladines derivatives will be given.
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Affiliation(s)
- Estelle Sfecci
- Nice Institute of Chemistry, Marine Natural Product Team, University Nice Sophia Antipolis, Parc Valrose, 28 avenue de Valrose, 06108 Nice Cedex 02, France.
| | | | - Philippe Amade
- Nice Institute of Chemistry, Marine Natural Product Team, University Nice Sophia Antipolis, Parc Valrose, 28 avenue de Valrose, 06108 Nice Cedex 02, France.
| | - Mohamed Mehiri
- Nice Institute of Chemistry, Marine Natural Product Team, University Nice Sophia Antipolis, Parc Valrose, 28 avenue de Valrose, 06108 Nice Cedex 02, France.
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33
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Bhat M, Belagali SL. Guanidinyl benzothiazole derivatives: Synthesis and structure activity relationship studies of a novel series of potential antimicrobial and antioxidants. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2454-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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34
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Basavaprabhu H, Prabhu G, Krishnamurthy M, Rao PN, Sureshbabu VV. “Thioureidopeptide”: Novel Synthon for the Synthesis of N, N′, N″-Trisubstituted Guanidinopeptide Mimics. Int J Pept Res Ther 2015. [DOI: 10.1007/s10989-015-9496-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Zhang Y, Huang Y, Zhang J, Zhu L, Chen K, Hao J. Two unprecedented aromatic guanidines supramolecular chains self-assembled by hydrogen bonding interaction. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.05.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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36
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Chen J, Guo YP, Sun MH, Fan GT, Zhou L. Bromoform reaction of tertiary amines with N,N-dibromosulfonamides or NBS/sulfonamides. Chem Commun (Camb) 2015; 50:12367-70. [PMID: 25187429 DOI: 10.1039/c4cc05578k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new bromoform reaction of tertiary amines with N,N-dibromosulfonamides or NBS/sulfonamides has been developed. A series of amidines were prepared with moderate to good yields via a Csp(3)-Csp(3) bond cleavage.
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Affiliation(s)
- Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, P. R. China.
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37
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Xu L, Zhang WX, Xi Z. Mechanistic Considerations of the Catalytic Guanylation Reaction of Amines with Carbodiimides for Guanidine Synthesis. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00251] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ling Xu
- Beijing
National Laboratory for Molecular Sciences, and Key Laboratory of
Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
| | - Wen-Xiong Zhang
- Beijing
National Laboratory for Molecular Sciences, and Key Laboratory of
Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
- State
Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Zhenfeng Xi
- Beijing
National Laboratory for Molecular Sciences, and Key Laboratory of
Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
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38
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Zhang J, Zhang X, Wu W, Zhang G, Xu S, Shi M. Intramolecular aminochalcogenation and diamination of alkenes employing N-iodosuccinimide. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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39
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Abstract
Naturally occurring guanidine derivatives frequently display medicinally useful properties. Among them, the higher order pyrrole-imidazole alkaloids, the dragmacidins, the crambescidins/batzelladines, and the saxitoxins/tetradotoxins have stimulated the development of many new synthetic methods over the past decades. We provide here an overview of the syntheses of these cyclic guanidine-containing natural products.
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Affiliation(s)
- Yuyong Ma
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Saptarshi De
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Chuo Chen
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
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40
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Nishikawa Y, Kimura S, Kato Y, Yamazaki N, Hara O. Pd(II)-Catalyzed Allylic C–H Amination for the Preparation of 1,2- and 1,3-Cyclic Ureas. Org Lett 2015; 17:888-91. [DOI: 10.1021/ol5037453] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yasuhiro Nishikawa
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Seikou Kimura
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuri Kato
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Natsuka Yamazaki
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Osamu Hara
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
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41
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Wusiman A, Mulati A. Facile One-Pot Synthesis of Cyclic N-Sulfonylamidines from Lactam and Sulfonamide. HETEROCYCLES 2015. [DOI: 10.3987/com-15-13307] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Xue M, Zheng Y, Hong Y, Yao Y, Xu F, Zhang Y, Shen Q. Catalytic addition of amines to carbodiimides by bis(β-diketiminate)lanthanide(ii) complexes and mechanistic studies. Dalton Trans 2015; 44:20075-86. [DOI: 10.1039/c5dt03674g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Bis(β-diketiminate)lanthanide(ii) complexes L2Ln(THF)n were found to be excellent pre-catalysts for catalytic addition of amines to carbodiimides and a possible catalytic mechanism was proposed on the basis of the isolation of monoguanidinate Eu(ii) and bis(guanidinate) Yb(iii) species.
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Affiliation(s)
- Mingqiang Xue
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yu Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yubiao Hong
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Fan Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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43
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Cinchona-based primary amine-catalyzed enantioselective aza-Michael reactions of pyrroles with α,β-unsaturated aldehydes. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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44
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Chronic toxicity study of neosaxitoxin in rats. Mar Drugs 2014; 12:5055-71. [PMID: 25257789 PMCID: PMC4178483 DOI: 10.3390/md12095055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 06/06/2014] [Accepted: 07/07/2014] [Indexed: 01/31/2023] Open
Abstract
Neosaxitoxin (NeoSTX) is a specific reversible blocker of voltage gated sodium channels on excitable cells. In the last decade, it has been tested in a number of interesting clinical trials, however there is still little information available on mammalian toxicity. Rats were treated for 12 weeks with doses of 1, 3 or 6 μg/kg of subcutaneous NeoSTX. At weeks 12 and 17, animals were sacrificed and blood samples collected for hematological and biochemical analysis. Organs were harvested for weight determination and histopathological assessments. The lowest acute toxicity via the intraperitoneal (ip) route was (30.35 μg/kg) and there was no significant difference between intramuscular and subcutaneous routes (11.4 and 12.41 μg/kg). The NeoSTX adiministration did not produce lethality at week 12 and after five weeks of suspension. NeoSTX 6 μg/kg ip produced reductions (p < 0.05) in body weight and food intake, and increased blood level of total and direct bilirubin, GGT and SGOT at week 12; all of these were reversed in the recovery period. NeoSTX 1 and 3 μg/kg ip did not show significant changes with the control group. Histopathological presentations were normal in all groups. This study revealed that NeoSTX is safe in vivo, giving a reliable security margin for its use like a local anesthetic.
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45
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Zavesky B, Babij NR, Wolfe JP. Synthesis of substituted 2-aminoimidazoles via Pd-catalyzed alkyne carboamination reactions. Application to the synthesis of preclathridine natural products. Org Lett 2014; 16:4952-5. [PMID: 25198672 PMCID: PMC4168774 DOI: 10.1021/ol502471x] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Indexed: 01/18/2023]
Abstract
A new method for the synthesis of 2-aminoimidazole products is described. The heterocyclic products are generated in good yields via Pd-catalyzed carboamination reactions of N-propargyl guanidines and aryl triflates. This methodology generates both a C-N and C-C bond during the annulation step and facilitates the rapid construction of 2-aminoimidazole products with different aryl groups. The utility of this methodology was demonstrated in the total synthesis of preclathridine A, preclathridine B, and dorimidazole B from a single intermediate.
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Affiliation(s)
- Blane
P. Zavesky
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1005, United States
| | - Nicholas R. Babij
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1005, United States
| | - John P. Wolfe
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1005, United States
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46
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Hosamani B, Narendra N, Prabhu G, Sureshbabu VV. Synthesis of N-urethane protected amino alkyl (S-methyl)-isothiouronium compounds and carbodiimide tethered peptidomimetics: an application for guanidino and substituted guanidino peptidomimetics synthesis. RSC Adv 2014. [DOI: 10.1039/c4ra07252a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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47
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Gao Z, Zhang L, Sun Z, Yu H, Xiao Y, Guo H. DABCO-catalyzed [3 + 2] annulation of sulfamate-derived cyclic imines with isocyanoacetates: synthesis of sulfamate-fused 2-imidazoline. Org Biomol Chem 2014; 12:5691-7. [DOI: 10.1039/c4ob00840e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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48
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Zhang X, Kuča K, Dohnal V, Dohnalová L, Wu Q, Wu C. Military potential of biological toxins. J Appl Biomed 2014. [DOI: 10.1016/j.jab.2014.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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49
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Cohrt AE, Nielsen TE. Solid-phase synthesis of peptide thioureas and thiazole-containing macrocycles through Ru-catalyzed ring-closing metathesis. ACS COMBINATORIAL SCIENCE 2014; 16:71-7. [PMID: 24377264 DOI: 10.1021/co400102v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
N-Terminally modified α-thiourea peptides can selectively be synthesized on solid support under mild reaction conditions using N,N'-di-Boc-thiourea and Mukaiyama's reagent (2-chloro-1-methyl-pyridinium iodide). This N-terminal modification applies to the 20 proteinogenic amino acid residues on three commonly used resins for solid-phase synthesis. Complementary methods for the synthesis of α-guanidino peptides have also been developed. The thiourea products underwent quantitative reactions with α-halo ketones to form thiazoles in excellent purities and yields. When strategically installed between two alkene moieties, said thiazole core was conveniently embedded in peptide macrocycles via Ru-catalyzed ring-closing metathesis reactions. Various 15-17 membered macrocycles were easily accessible in all diastereomeric forms using this methodology. The developed "build/couple/pair" strategy is well suited for the generation of larger and stereochemically complete screening libraries of thiazole-containing peptide macrocycles.
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Affiliation(s)
- A. Emil Cohrt
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
| | - Thomas E. Nielsen
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
- Singapore
Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551
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50
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Abstract
This review covers the isolation, chemical structure, biological activity, structure activity relationships including synthesis of chemical probes, and pharmacological characterization of neuroactive marine natural products; 302 references are cited.
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Affiliation(s)
- Ryuichi Sakai
- Faculty of Fisheries Sciences, Hokkaido University, Hakodate 041-8611, Japan.
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