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Saini A, Seni K, Chawla PA, Chawla V, Ganti SS. An insight into recent updates on analytical techniques for bioactive alkaloids. PHYTOCHEMICAL ANALYSIS : PCA 2024; 35:423-444. [PMID: 38369684 DOI: 10.1002/pca.3338] [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: 12/19/2023] [Revised: 01/11/2024] [Accepted: 01/28/2024] [Indexed: 02/20/2024]
Abstract
INTRODUCTION Alkaloids represent a wide class of naturally existing nitrogen-containing organic compounds having diverse biological activities. They are primary bioactive substances extracted from diverse plant parts. Due to their diverse biological activities, they are frequently used as medicines. The alkaloids have diverse pharmacological impacts on the human body; alkaloids are used for prevention, treatment, and reduction of discomfort associated with chronic illnesses. As most alkaloids exist in plants in complex form, combined with numerous other natural plant components, it is essential to recognize and characterize these molecules using different analytical techniques. OBJECTIVES We aimed to review the literature on the methods and protocols for the analysis of naturally occurring alkaloids. METHODS We carried out a literature survey using the PubMed, Scopus, and Google Scholar databases and other relevant published materials. The keywords used in the searches were "alkaloids," "analytical methods," "HPLC method," "GC method," "electrochemical methods," and "bioanalytical methods," in various combinations. RESULTS In this article, several classes of alkaloids are presented, along with their biological activities. Moreover, it includes a thorough explanation of chromatographic techniques, hyphenated techniques, electrochemical techniques, and current trending analytical methods utilized for the isolation, identification, and comprehensive characterization of alkaloids. CONCLUSIONS The various analytical techniques play an important role in the identification as well as the characterization of various alkaloids from plants, plasma samples, and urine samples. The hyphenation of various chromatographic techniques with mass spectrometry and NMR spectroscopy plays a crucial role in the characterization of unknown compounds.
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Affiliation(s)
- Aniket Saini
- Department of Pharmaceutical Analysis, ISF College of Pharmacy, Moga, Punjab, India
| | - Kushal Seni
- Department of Pharmaceutical Analysis, ISF College of Pharmacy, Moga, Punjab, India
| | - Pooja A Chawla
- Department of Pharmaceutical Analysis, ISF College of Pharmacy, Moga, Punjab, India
- University Institute of Pharmaceutical Sciences and Research, Baba Farid University of Health Sciences, Faridkot, Punjab, India
| | - Viney Chawla
- University Institute of Pharmaceutical Sciences and Research, Baba Farid University of Health Sciences, Faridkot, Punjab, India
| | - Subrahmanya S Ganti
- Department of Pharmaceutical Analysis, ISF College of Pharmacy, Moga, Punjab, India
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2
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Iqbal S, Farhanaz, Roohi, Zaheer MR, Shankar K, Hussain MK, Zia Q, Rehman MT, AlAjmi MF, Gupta A. Visible-light promoted catalyst-free (VLCF) multi-component synthesis of spiro indolo-quinazolinone-pyrrolo[3,4-a]pyrrolizine hybrids: evaluation of in vitro anticancer activity, molecular docking, MD simulation and DFT studies. J Biomol Struct Dyn 2024; 42:3145-3165. [PMID: 37227775 DOI: 10.1080/07391102.2023.2214229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 05/01/2023] [Indexed: 05/27/2023]
Abstract
A new and highly efficient visible-light-promoted catalyst free (VLCF) strategy for neat and clean synthesis of spiro indolo-quinazolinone-pyrrolo[3,4-a]pyrrolizine hybrids (6a-d) has been introduced. We have performed visible-light triggered 1,3-Dipolar cycloaddition reaction of maleimide (5a-d) with azomethine ylide generated in situ derived from tryptanthrin (3) and L-proline (4) to obtain desired products (6a-d) in good to excellent yield. Authentication and characterization of product was done using various spectroscopic techniques such as IR, 1H NMR, 13C NMR, Mass spectrometry and single crystal XRD analysis. To explain the reaction spontaneity, product stability, reactivity as well as possible mode of the interaction a quantum chemical investigation was performed and depicted through DFT studies. The synthesized compound 6a was also evaluated for anti-proliferative activity against a panel of five cancer cell lines (MCF-7, MDA-MB-231, HeLa, PC-3 and Ishikawa) and normal human embryonic kidney (HEK-293) cell line by using MTT assay. Compound 6a showed very good in vitro anti-proliferative activity (IC50 = 6.58-17.98 μM) against four cancer cell lines and no cytotoxicity against normal HEK-293. In order to evaluate the anticancer potential of compounds 6a-d, molecular docking was performed against wild type and mutant EGFR. The results suggest that all the compounds occupied the active site of both enzymes, with a strong binding energy (-10.2 to -11.5 kcal/mol). These results have been confirmed by molecular dynamics simulation by evaluating root mean square deviation (RMSD) and root mean square fluctuation (RMSF), along with principal component analysis (PCA).Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Safia Iqbal
- Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - Farhanaz
- Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - Roohi
- Protein Research Laboratory, Department of Bioengineering, Integral University, Lucknow, India
| | - Mohd Rehan Zaheer
- Department of Chemistry, R.M.P.S.P. Girls Post Graduate College, Basti, India
| | - Krapa Shankar
- Sun Pharmaceutical industries Ltd, Sarhaul, Sector 18, Gurgaon, India
| | | | - Qamar Zia
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majma'ah, Saudi Arabia
| | - Md Tabish Rehman
- Department of pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed F AlAjmi
- Department of pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Anamika Gupta
- Department of Chemistry, Aligarh Muslim University, Aligarh, India
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Alruwad MI, Salah El Dine R, Gendy AM, Sabry MM, El Hefnawy HM. Exploring the Biological and Phytochemical Potential of Jordan's Flora: A Review and Update of Eight Selected Genera from Mediterranean Region. Molecules 2024; 29:1160. [PMID: 38474670 DOI: 10.3390/molecules29051160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
Jordan's flora is known for its rich diversity, with a grand sum of 2978 plant species that span 142 families and 868 genera across four different zones. Eight genera belonging to four different plant families have been recognized for their potential natural medicinal properties within the Mediterranean region. These genera include Chrysanthemum L., Onopordum Vaill. Ex. L., Phagnalon Cass., and Senecio L. from the Asteraceae family, in addition to Clematis L. and Ranunculus L. from the Ranunculaceae family, Anchusa L. from the Boraginaceae family, and Eryngium L. from the Apiaceae family. The selected genera show a wide variety of secondary metabolites with encouraging pharmacological characteristics including antioxidant, antibacterial, cytotoxic, anti-inflammatory, antidiabetic, anti-ulcer, and neuroprotective actions. Further research on these genera and their extracts will potentially result in the formulation of novel and potent natural pharmaceuticals. Overall, Jordan's rich flora provides a valuable resource for exploring and discovering new plant-based medicines.
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Affiliation(s)
- Manal I Alruwad
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt
| | - Riham Salah El Dine
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt
| | - Abdallah M Gendy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, October 6 University, Giza 12585, Egypt
| | - Manal M Sabry
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt
| | - Hala M El Hefnawy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt
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4
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Nie M, Alejandro Valdes-Pena M, Frohock BH, Smits E, Daiker JC, Gilbertie JM, Schnabel LV, Pierce JG. Expanded library of novel 2,3-pyrrolidinedione analogues exhibit anti-biofilm activity. Bioorg Med Chem Lett 2024; 99:129609. [PMID: 38191097 PMCID: PMC10872213 DOI: 10.1016/j.bmcl.2024.129609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 01/02/2024] [Accepted: 01/04/2024] [Indexed: 01/10/2024]
Abstract
Herein we report a new library of 2,3-pyrrolidinedione analogues that expands on our previous report on the antimicrobial studies of this heterocyclic scaffold. The novel 2,3-pyrrolidinediones reported herein have been evaluated against S. aureus and methicillin-resistant S. aureus (MRSA) biofilms, and this work constitutes our first report on the antibiofilm properties of this class of compounds. The antibiofilm activity of these 2,3-pyrrolidinediones has been assessed through minimum biofilm eradication concentration (MBEC) and minimum biofilm inhibition concentration (MBIC) assays. The compounds displayed antibiofilm properties and represent intriguing scaffolds for further optimization and development.
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Affiliation(s)
- Minhua Nie
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - M Alejandro Valdes-Pena
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Bram H Frohock
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Emma Smits
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Jennifer C Daiker
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Department of Clinical Sciences College of Veterinary Medicine, NC State University, 1060 William Moore Drive, Raleigh, NC 27607, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Jessica M Gilbertie
- Department of Clinical Sciences College of Veterinary Medicine, NC State University, 1060 William Moore Drive, Raleigh, NC 27607, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Lauren V Schnabel
- Department of Clinical Sciences College of Veterinary Medicine, NC State University, 1060 William Moore Drive, Raleigh, NC 27607, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA
| | - Joshua G Pierce
- Department of Chemistry, College of Sciences, NC State University, Raleigh, NC 27695, USA; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, USA.
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Okladnikov IV, Aksenova SA, Ioffe SL, Sukhorukov AY. Catalytic Reductive Recyclization of Functionalized Isoxazoline N-Oxides to Pyrrolizidine-3-ones. J Org Chem 2024; 89:379-394. [PMID: 38096381 DOI: 10.1021/acs.joc.3c02154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Pyrrolizidine is among the saturated N-heterocyclic scaffolds most frequently found in natural products and pharmaceutically relevant substances. Herein, a strategy for the synthesis of polysubstituted pyrrolizidine-3-ones by catalytic reductive domino-type recyclization of properly functionalized isoxazoline N-oxides was developed. The process is diastereoselective, and one diastereomer (out of four possible ones) is predominant in many of the studied cases. Using the developed method, modifications of potent GSK's PDE4 inhibitor and MSD's potent hNK1 antagonist were prepared.
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Affiliation(s)
- Ilya V Okladnikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, 119991 Moscow, Russian Federation
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russian Federation
| | - Svetlana A Aksenova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991 Moscow, Russian Federation
- Moscow Institute of Physics and Technology (National Research University), Institutskiy per. 9, Dolgoprudny, 141700 Moscow Region, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, 119991 Moscow, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, 119991 Moscow, Russian Federation
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Alshammari MB, Aly AA, Ahmad A, Brown AB, Mohamed AH. Recent synthetic strategies of spiro-azetidin-2-one, -pyrrolidine, -indol(one) and -pyran derivatives-a review. RSC Adv 2023; 13:32786-32823. [PMID: 37942448 PMCID: PMC10628897 DOI: 10.1039/d3ra06054c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/24/2023] [Indexed: 11/10/2023] Open
Abstract
Spiro-heterocycles have received special attention in medicinal chemistry because of their promising biological activity. Over the years, many synthetic methodologies have been established for the construction of spirocyclic compounds. Spiro heterocycles such as spiro-azetidin-2-one, -pyrrolidine, -indol(one) and -pyran derivatives have been found to exhibit diversified biological and pharmacological activity in addition to their therapeutic properties. In view of these facts, we decided in this review to present representative synthetic approaches of the aforementioned spiro heterocycles, especially in the past 20 years.
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Affiliation(s)
- Mohammed B Alshammari
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University Al-Kharij Saudi Arabia
| | - Ashraf A Aly
- Chemistry Department, Faculty of Science, Minia University 61519 El-Minia Egypt
| | - Akil Ahmad
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University Al-Kharij Saudi Arabia
| | - Alan B Brown
- Department of Chemistry and Chemical Engineering, Florida Institute of Technology Melbourne FL 32901 USA
| | - Asmaa H Mohamed
- Chemistry Department, Faculty of Science, Minia University 61519 El-Minia Egypt
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Amin T, Sharma RP, Mir KB, Slathia N, Chhabra S, Tsering D, Kotwal P, Bhagat M, Nandi U, Parkesh R, Kapoor KK, Goswami A. Quinoxalinone substituted pyrrolizine (4h)-induced dual inhibition of AKT and ERK instigates apoptosis in breast and colorectal cancer by modulating mitochondrial membrane potential. Eur J Pharmacol 2023; 957:175945. [PMID: 37541376 DOI: 10.1016/j.ejphar.2023.175945] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 07/08/2023] [Accepted: 07/31/2023] [Indexed: 08/06/2023]
Abstract
AKT and ERK 1/2 play a pivotal role in cancer cell survival, proliferation, migration, and angiogenesis. Therefore, AKT and ERK 1/2 are considered crucial targets for cancer intervention. In this study, we envisaged the role of AKT and ERK signaling in apoptosis regulation in presence of compound 4h, a novel synthetic derivative of quinoxalinone substituted spiropyrrolizines exhibiting substantial antiproliferative activity in various cancer cell lines. Structurally 4h is a spiropyrrolizine derivative. Molecular docking analysis revealed that compound 4h shows strong binding affinity with AKT-1 (-9.5 kcal/mol) and ERK2 (-9.0 kcal/mol) via binding at allosteric sites of AKT and active site of ERK2. The implications of 4h binding with these two survival kinases resulted in the obstruction for ATP binding, hence, hampering their phosphorylation dependent activation. We demonstrate that 4h mediated apoptotic induction via disruption in the mitochondrial membrane potential of MCF-7 and HCT-116 cells and 4h-mediated inhibition of survival pathways occurred in a wild type PTEN background and is diminished in PTEN-/- cells. In 4T1 mammary carcinoma model, 4h exhibited pronounced reduction in the tumor size and tumor volume at significantly low doses. Besides, 4h reached the highest plasma concentration of 5.8 μM within a period of 1 h in mice model intraperitoneally. Furthermore, 4h showed acceptable clearance with an adequate elimination half-life and satisfactory pharmacokinetic behaviour, thus proclaiming as a potential lead molecule against breast and colorectal cancer by specifically inhibiting simultaneously AKT and ERK1/2 kinases.
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Affiliation(s)
- Tanzeeba Amin
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | | | - Khalid Bashir Mir
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Nancy Slathia
- Department of Chemistry, University of Jammu, Jammu 180006, India
| | - Sonali Chhabra
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India; CSIR-Institute of Microbial Technology, Chandigarh, 160036, India
| | - Dolma Tsering
- Department of Chemistry, University of Jammu, Jammu 180006, India
| | - Pankul Kotwal
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Madhulika Bhagat
- School of Biotechnology, University of Jammu, J&K, 181143, India
| | - Utpal Nandi
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Raman Parkesh
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India; CSIR-Institute of Microbial Technology, Chandigarh, 160036, India
| | - Kamal K Kapoor
- School of Biotechnology, University of Jammu, J&K, 181143, India.
| | - Anindya Goswami
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India.
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Wang H, Zhou T, Wu M, Ye Q, He X. Substituent-Controllable Cascade Regioselective Annulation of β-Enaminones with N-Sulfonyl Triazoles for Modular Access to Imidazoles and Pyrroles. Molecules 2023; 28:molecules28114416. [PMID: 37298892 DOI: 10.3390/molecules28114416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/12/2023] Open
Abstract
A controllable synthesis of trisubstituted imidazoles and pyrroles has been developed through rhodium(II)-catalyzed regioselective annulation of N-sulfonyl-1,2,3-trizaoles with β-enaminones. The imidazole ring was formed through a 1,1-insertion of the N-H bond to α-imino rhodium carbene, followed by a subsequent intramolecular 1,4-conjugate addition. This occurred when the α-carbon atom of the amino group was bearing a methyl group. Additionally, the pyrrole ring was constructed by utilizing a phenyl substituent and undergoing intramolecular nucleophilic addition. The mild conditions, good tolerance towards functional groups, gram-scale synthesis capability, and ability to undergo valuable transformations of the products qualify this unique protocol as an efficient tool for the synthesis of N-heterocycles.
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Affiliation(s)
- Hua Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Tongtong Zhou
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Mengdi Wu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Qingqing Ye
- Department of Medicine, Chuzhou City Vocation College, Chuzhou 239000, China
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
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9
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Lin B, Xu P, Zheng J, Deng X, Ye Q, Huang Z, Wang N. Effects and mechanisms of natural alkaloids for prevention and treatment of osteoporosis. Front Pharmacol 2022; 13:1014173. [PMID: 36210805 PMCID: PMC9539536 DOI: 10.3389/fphar.2022.1014173] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 08/31/2022] [Indexed: 11/20/2022] Open
Abstract
Natural alkaloids are polycyclic, nitrogen-containing, and basic compounds obtained from plants. In this review, the advances in bioactive alkaloids with respect to their chemical structures, herbal sources, and effects for the prevention and treatment of osteoporosis are discussed. Anti-osteoporosis alkaloids are classified into six categories based on the chemical structure, namely, isoquinoline alkaloids, quinolizidine alkaloids, piperidine alkaloids, indole alkaloids, pyrrolizidine alkaloids and steroidal alkaloids. They promote mesenchymal stem cells differentiation, improve osteoblast proliferation, stimulate osteoblast autophagy and suppress osteoclast formation. These natural alkaloids can regulate multiple signaling pathways, including interrupting the tumor necrosis factor receptor associated factor 6- receptor activator of nuclear factor kappa B interaction, inhibiting the nuclear factor kappa B pathway in osteoclasts, activating the p38 mitogen-activated protein kinases pathway in osteoblasts, and triggering the wingless and int-1 pathway in mesenchymal stem cells. This review provides evidence and support for novel drug and clinical treatment of osteoporosis using natural alkaloids.
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Affiliation(s)
- Bingfeng Lin
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
| | - Pingcui Xu
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
| | - Juan Zheng
- Hangzhou Institute for Food and Drug Control, Hangzhou, China
| | - Xuehui Deng
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qitao Ye
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhongping Huang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Nani Wang
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
- *Correspondence: Nani Wang,
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Kobets T, Smith BPC, Williams GM. Food-Borne Chemical Carcinogens and the Evidence for Human Cancer Risk. Foods 2022; 11:foods11182828. [PMID: 36140952 PMCID: PMC9497933 DOI: 10.3390/foods11182828] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
Commonly consumed foods and beverages can contain chemicals with reported carcinogenic activity in rodent models. Moreover, exposures to some of these substances have been associated with increased cancer risks in humans. Food-borne carcinogens span a range of chemical classes and can arise from natural or anthropogenic sources, as well as form endogenously. Important considerations include the mechanism(s) of action (MoA), their relevance to human biology, and the level of exposure in diet. The MoAs of carcinogens have been classified as either DNA-reactive (genotoxic), involving covalent reaction with nuclear DNA, or epigenetic, involving molecular and cellular effects other than DNA reactivity. Carcinogens are generally present in food at low levels, resulting in low daily intakes, although there are some exceptions. Carcinogens of the DNA-reactive type produce effects at lower dosages than epigenetic carcinogens. Several food-related DNA-reactive carcinogens, including aflatoxins, aristolochic acid, benzene, benzo[a]pyrene and ethylene oxide, are recognized by the International Agency for Research on Cancer (IARC) as causes of human cancer. Of the epigenetic type, the only carcinogen considered to be associated with increased cancer in humans, although not from low-level food exposure, is dioxin (TCDD). Thus, DNA-reactive carcinogens in food represent a much greater risk than epigenetic carcinogens.
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Affiliation(s)
- Tetyana Kobets
- Department of Pathology, Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA
- Correspondence: ; Tel.: +1-914-594-3105; Fax: +1-914-594-4163
| | - Benjamin P. C. Smith
- Future Ready Food Safety Hub, Nanyang Technological University, Singapore 639798, Singapore
| | - Gary M. Williams
- Department of Pathology, Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA
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11
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Sohail M, Bilal M, Maqbool T, Rasool N, Ammar M, Mahmood S, Malik A, Zubair M, Abbas Ashraf G. Iron-catalyzed synthesis of N-heterocycles via intermolecular and intramolecular cyclization reactions: A review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104095] [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] Open
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12
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Liang YQ, Xu YX, Cai ZJ, Ji SJ. Visible-light photocatalytic radical addition-translocation-cyclization to construct sulfonyl-containing azacycles. Chem Commun (Camb) 2022; 58:10206-10209. [PMID: 36000456 DOI: 10.1039/d2cc03799h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a novel visible-light photocatalytic radical addition-translocation-cyclization (RATC) approach for the efficient synthesis of sulfonyl-containing azacycles is described. The reaction delivers a wide range of monocyclic, bicyclic and polycyclic azacycles by using easily prepared sodium sulfinates and N-homopropargylic amines as starting materials. Instead of the traditionally used toxic tin reagents and thermally hazardous azos in the RATC process, clean, renewable and sustainable visible light combined with a catalytic amount of photosensitizer is used in this process. Moreover, the successful transformation of some drug derivatives further highlights the potential application of this procedure.
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Affiliation(s)
- Yu-Qing Liang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Yi-Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Zhong-Jian Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China. .,Suzhou Baolidi Functional Materials Research Institute, Suzhou Xiangcheng, 215144, China
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13
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Kumar SV, Guiry PJ. Zinc‐Catalyzed Enantioselective [3+2] Cycloaddition of Azomethine Ylides Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐ligands. Angew Chem Int Ed Engl 2022; 61:e202205516. [PMID: 35603757 PMCID: PMC9543521 DOI: 10.1002/anie.202205516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Sundaravel Vivek Kumar
- Centre for Synthesis and Chemical Biology (CSCB) School of Chemistry University College Dublin (UCD) Belfield, Dublin 4 Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology (CSCB) School of Chemistry University College Dublin (UCD) Belfield, Dublin 4 Ireland
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14
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Kumar SV, Guiry PJ. Zinc‐Catalyzed Enantioselective [3+2] Cycloaddition of Azomethine Ylides Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐ligands. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sundaravel Vivek Kumar
- Centre for Synthesis and Chemical Biology (CSCB) School of Chemistry University College Dublin (UCD) Belfield, Dublin 4 Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology (CSCB) School of Chemistry University College Dublin (UCD) Belfield, Dublin 4 Ireland
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15
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Stefova E, Cvetanoska M, Bogdanov J, Matevski V, Stanoeva JP. Assessment of Distribution and Diversity of Pyrrolizidine Alkaloids in the Most Prevalent Boraginaceae Species in Macedonia. Chem Biodivers 2022; 19:e202200066. [PMID: 35581149 DOI: 10.1002/cbdv.202200066] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/17/2022] [Indexed: 11/06/2022]
Abstract
Systematic study of extraction efficiency of pyrrolizidine alkaloids (PAs) and corresponding pyrrolizidine alkaloid N-oxides (PANOs) from plant material for subsequent LC/MS analysis was carried out. The optimal extraction was achieved with methanol and one clean up step using SPE C18 column. With the optimized LC-ESI-MS/MS method using ion trap, the distribution and diversity of PAs and PANOs in plant material (leaves, flowers and stems) obtained from wild-growing E. vulgare, E. italicum, S. officinale L., C. creticum and O. heterophylla species from Macedonia was assessed. These widespread Boraginaceae species contain various PAs and PANOs and 25 of them were identified. Based on these qualitative and quantitative analyses, the profiles of 1,2-unsaturated PAs for each sample were obtained and their toxic potential was estimated. The toxic potential of O. heterophylla and C. creticum were assumed to be highest (containing up to 4753 mg/kg and 3507 mg/kg), followed by E. vulgare (up to 1340 mg/kg), S. officinale L. (up to 479 mg/kg) and E. italicum (up to 16 mg/kg). This method can be used for monitoring the inclusion of these secondary metabolites in the food chain in order to contribute in their risk management.
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Affiliation(s)
- Elena Stefova
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, R. N. Macedonia
| | - Marinela Cvetanoska
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, R. N. Macedonia
| | - Jane Bogdanov
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, R. N. Macedonia
| | - Vlado Matevski
- Institute of Biology, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, R. N. Macedonia.,Macedonian Academy of Sciences and Arts, Krste Misirkov 2, 1000, Skopje, R. N. Macedonia
| | - Jasmina Petreska Stanoeva
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, R. N. Macedonia
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16
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Wang L, Zhang Y, Miao AQ, Zhang TS, Wang X, Hao WJ, Tu SJ, Jiang B. Nitrative bicyclization of 1,7-diynes for accessing skeletally diverse tricyclic pyrroles. Chem Commun (Camb) 2022; 58:4376-4379. [PMID: 35297437 DOI: 10.1039/d2cc00206j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel metal-free nitrative bicyclization of 1,7-diynes with tBuONO in the presence of H2O is reported, producing three types of skeletally diverse tricyclic pyrroles, namely pyrrolo[3,4-c]quinolines, chromeno[3,4-c]pyrroles and benzo[e]isoindoles, with moderate to good yields by simply tuning the linkers of the 1,7-diynes. This domino protocol demonstrates remarkable compatibility regarding 1,7-diynes with different linkers, such as nitrogen and oxygen atoms and a hydroxymethyl group, and tBuONO plays dual roles as a nitro precursor as well as a nitrogen atom source.
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Affiliation(s)
- Lu Wang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Yin Zhang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - An-Qi Miao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Tian-Shu Zhang
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, P. R. China.
| | - Xiang Wang
- School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, People's Republic of China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
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17
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Zhang R, Yan X, Yin S, Wang W, Zhu W, Fu P. Discovery of New Bohemamines and Synthesis of
Methylene‐Bridged
Chimeric Derivatives through Natural Product Chimera Strategy. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rongxin Zhang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
| | - Xiaotang Yan
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
| | - Shupeng Yin
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
| | - Weihong Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China
| | - Peng Fu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China
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18
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Dagoneau D, Quinodoz P, Kolleth A, Bozoflou M, Horoz B, Catak S, Poisson PA, Lumbroso A, Sulzer-Mossé S, De Mesmaeker A. A Short and Versatile Approach for the Synthesis of Pyrrolizidinones. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dylan Dagoneau
- Syngenta Crop Protection AG Crop Protection Research, Research Chemistry Schaffhauserstrasse 101 4332 Stein SWITZERLAND
| | - Pierre Quinodoz
- Syngenta Crop Protection AG Research Chemistry Stein SWITZERLAND
| | - Amandine Kolleth
- Syngenta Crop Protection AG Research Chemistry Stein SWITZERLAND
| | - Mert Bozoflou
- Bogazici Universitesi Department of Chemistry Bebek 34342 Istanbul TURKEY
| | - Beyza Horoz
- Bogazici Universitesi Department of Chemistry Bebek 34342 Istanbul TURKEY
| | - Saron Catak
- Bogazici Universitesi Department of Chemistry Bebek 34342 Istanbul TURKEY
| | | | | | | | - Alain De Mesmaeker
- Syngenta Crop Protection AG Crop Protection Research, Research Chemistry Schaffhauserstrasse 101 4332 Stein SWITZERLAND
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19
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Gaviña D, Escolano M, Torres J, Alzuet‐Piña G, Sánchez‐Roselló M, Pozo C. Organocatalytic Enantioselective Friedel‐Crafts Alkylation Reactions of Pyrroles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100313] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Daniel Gaviña
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Marcos Escolano
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Javier Torres
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Gloria Alzuet‐Piña
- Department of Inorganic Chemistry University of Valencia E-46100 Burjassot Spain
| | | | - Carlos Pozo
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
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20
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Zhao H, Zhai H, Shen P, Guo Y, Wei J, Zhao Y. Straightforward Synthesis of Succinimide-Fused Pyrrolizidines by A Three-Component Reaction of α-Diketone, Amino Acid, and Maleimide. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractAn efficient, one-pot, three-component [3+2] cycloaddition reaction of azomethine ylide obtained from α-dicarbonyl compounds (cyclic and acyclic diketone or keto ester) and amino acids with maleimides under catalyst-free conditions has been developed. This cascade protocol shows high efficiency and remarkable functional group tolerance, and the ubiquitous succinimide-fused pyrrolizidines with a highly compact and strained scaffold were obtained with high yield and excellent diastereoselectivity. Furthermore, this novel and atom-economical strategy could be performed on a gram scale with comparable reaction efficiency.
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Affiliation(s)
- Hua Zhao
- Institute of Drug Discovery Technology, Ningbo University
| | - Hongbin Zhai
- The State Key Laboratory of Chemical Oncogenomics, Shenzhen Graduate School of Peking University
| | - Peng Shen
- Institute of Drug Discovery Technology, Ningbo University
| | - Yeting Guo
- Institute of Drug Discovery Technology, Ningbo University
| | - Jian Wei
- The State Key Laboratory of Chemical Oncogenomics, Shenzhen Graduate School of Peking University
| | - Yufen Zhao
- Institute of Drug Discovery Technology, Ningbo University
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21
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Palomba M, De Monte E, Mambrini A, Bagnoli L, Santi C, Marini F. A three-component [3 + 2]-cycloaddition/elimination cascade for the synthesis of spirooxindole-pyrrolizines. Org Biomol Chem 2021; 19:667-676. [PMID: 33399163 DOI: 10.1039/d0ob02321c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A three-component synthesis of novel spirooxindole-tetrahydropyrrolizines from secondary α-aminoacids, isatins and vinyl selenones has been disclosed. Products were formed in good yields and high diastereoselectivity by 1,3-dipolar cycloaddition of in situ generated azomethine ylides followed by spontaneous elimination of benzeneseleninic acid. Good regioselectivities with aryl substituted vinyl selenones were observed. The method showed good functional group tolerance, providing a direct approach to biologically relevant spirooxindoles under mild reaction conditions.
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Affiliation(s)
- Martina Palomba
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Emanuela De Monte
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Andrea Mambrini
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Luana Bagnoli
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Claudio Santi
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Francesca Marini
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
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22
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Fang Q, Wu L, Urwald C, Mugat M, Wang S, Kyeremeh K, Philips C, Law S, Zhou Y, Deng H. Genomic scanning enabling discovery of a new antibacterial bicyclic carbamate-containing alkaloid. Synth Syst Biotechnol 2021; 6:12-19. [PMID: 33553705 PMCID: PMC7820566 DOI: 10.1016/j.synbio.2021.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/02/2021] [Accepted: 01/08/2021] [Indexed: 01/13/2023] Open
Abstract
Non-ribosomal peptides are a group of structurally diverse natural products with various important therapeutic and agrochemical applications. Bacterial pyrrolizidine alkaloids (PAs), containing a scaffold of two fused five-membered ring system with a nitrogen atom at the bridgehead, have been found to originate from a multidomain non-ribosomal peptide synthetase to generate indolizidine intermediates, followed by multistep oxidation, catalysed by single Bayer-Villiger (BV) enzymes, to yield PA scaffolds. Although bacterial PAs are rare in natural product inventory, bioinformatics analysis suggested that the biosynthetic gene clusters (BGCs) that are likely to be responsible for the production of PA-like metabolites are widely distributed in bacterial genomes. However, most of the strains containing PA-like BGCs are not deposited in the public domain, therefore preventing further assessment of the chemical spaces of this group of bioactive metabolites. Here, we report a genomic scanning strategy to assess the potential of PA metabolites production in our culture collection without prior knowledge of genome information. Among the strains tested, we found fifteen contain the key BV enzymes that are likely to be involved in the last step of PA ring formation. Subsequently one-strain-many-compound (OSMAC) method, supported by a combination of HR-MS, NMR, SMART 2.0 technology, and GNPS analysis, allowed identification and characterization of a new [5 + 7] heterobicyclic carbamate, legoncarbamate, together with five known PAs, bohemamine derivatives, from Streptomyces sp. CT37, a Ghanaian soil isolate. The absolute stereochemistry of legoncarbamate was determined by comparison of measured and calculated ECD spectra. Legoncarbamate displays antibacterial activity against E. coli ATCC 25922 with an MIC value of 3.1 μg/mL. Finally, a biosynthetic model of legoncarbamate and other bohemamines was proposed based on the knowledge we have gained so far.
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Affiliation(s)
- Qing Fang
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
| | - Linrui Wu
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
| | - Caroline Urwald
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
- ENSAIA, 2 avenue de la forêt de Haye, 54505 vandœuvre lès Nancy, France
| | - Morgane Mugat
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
- ENSAIA, 2 avenue de la forêt de Haye, 54505 vandœuvre lès Nancy, France
| | - Shan Wang
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
| | - Kwaku Kyeremeh
- Department of Chemistry, University of Ghana, P.O. Box LG56, Legon-Accra, Ghana
| | - Carol Philips
- NCIMB Ltd, Ferguson Building, Craibstone Estate, Bucksburn, Aberdeen, AB21 9YA, Scotland, UK
| | - Samantha Law
- NCIMB Ltd, Ferguson Building, Craibstone Estate, Bucksburn, Aberdeen, AB21 9YA, Scotland, UK
| | - Yongjun Zhou
- Research Centre for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Hai Deng
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK
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23
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Lewis WJM, Shaw DM, Robertson J. Synthesis of legonmycins A and B, C(7a)-hydroxylated bacterial pyrrolizidines. Beilstein J Org Chem 2021; 17:334-342. [PMID: 33828615 PMCID: PMC7871033 DOI: 10.3762/bjoc.17.31] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/19/2021] [Indexed: 11/23/2022] Open
Abstract
A one-flask, two-step procedure from 3-amino-2-methyl-5,6,7,7a-tetrahydro-1H-pyrrolizin-1-one affords the Streptomyces secondary metabolites legonmycins A and B - three operations overall from methyl N-Boc-prolinate. The key step proceeds in each case via N,O-diacylation, then selective oxidative hydrolysis of the intermediate bicyclic pyrrole and establishes a precedent for the synthesis of related C(7a)-hydroxylated pyrrolizidines.
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Affiliation(s)
- Wilfred J M Lewis
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - David M Shaw
- Vertex Pharmaceuticals (Europe) Ltd., 86–88 Jubilee Avenue, Milton Park, Abingdon, OX14 4RW, United Kingdom
- current address: MSD UK Discovery Centre, Francis Crick Institute, 1 Midland Road, London, NW1 1AT, United Kingdom
| | - Jeremy Robertson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, United Kingdom
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24
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Kuriyama Y, Sasano Y, Hoshino Y, Uesugi SI, Yamaichi A, Iwabuchi Y. Highly Regioselective 5-endo-tet Cyclization of 3,4-Epoxy Amines into 3-Hydroxypyrrolidines Catalyzed by La(OTf) 3. Chemistry 2021; 27:1961-1965. [PMID: 33191563 DOI: 10.1002/chem.202004455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/27/2020] [Indexed: 11/08/2022]
Abstract
Highly regioselective intramolecular aminolysis of 3,4-epoxy amines has been achieved. Key features of this reaction are (1) chemoselective activation of epoxides in the presence of unprotected aliphatic amines in the same molecules by a La(OTf)3 catalyst and (2) excellent regioselectivity for anti-Baldwin 5-endo-tet cyclization. This reaction affords 3-hydroxy-2-alkylpyrrolidines stereospecifically in high yields. DFT calculations revealed that the regioselectivity might be attributed to distortion energies of epoxy amine substrates. The use of this reaction was demonstrated by the first enantioselective synthesis of an antispasmodic agent prifinium bromide.
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Affiliation(s)
- Yuse Kuriyama
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yusuke Sasano
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yoshihiko Hoshino
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Shun-Ichiro Uesugi
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Aoto Yamaichi
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yoshiharu Iwabuchi
- Department of Organic Chemistry, Graduate School of, Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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25
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Matsuya Y, Sugimoto K, Mizuno S, Shirato M, Tanabe K. De Novo Approach to Izidines via A Gold-Catalyzed Hydroamination–N-acyliminium Ion Cyclization of Acyclic Ynamides. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)38] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Zhang X, Guo J, Cheng F, Li S. Cytochrome P450 enzymes in fungal natural product biosynthesis. Nat Prod Rep 2021; 38:1072-1099. [PMID: 33710221 DOI: 10.1039/d1np00004g] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Covering: 2015 to the end of 2020 Fungal-derived polyketides, non-ribosomal peptides, terpenoids and their hybrids contribute significantly to the chemical space of total natural products. Cytochrome P450 enzymes play essential roles in fungal natural product biosynthesis with their broad substrate scope, great catalytic versatility and high frequency of involvement. Due to the membrane-bound nature, the functional and mechanistic understandings for fungal P450s have been limited for quite a long time. However, recent technical advances, such as the efficient and precise genome editing techniques and the development of several filamentous fungal strains as heterologous P450 expression hosts, have led to remarkable achievements in fungal P450 studies. Here, we provide a comprehensive review to cover the most recent progresses from 2015 to 2020 on catalytic functions and mechanisms, research methodologies and remaining challenges in the fast-growing field of fungal natural product biosynthetic P450s.
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Affiliation(s)
- Xingwang Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China. and Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266237, China
| | - Jiawei Guo
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
| | - Fangyuan Cheng
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
| | - Shengying Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China. and Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266237, China
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27
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Dikošová L, Otočková B, Malatinský T, Doháňošová J, Kopáčová M, Ďurinová A, Smutná L, Trejtnar F, Fischer R. New total synthesis and structure confirmation of putative (+)-hyacinthacine C 3 and (+)-5- epi-hyacinthacine C 3. RSC Adv 2021; 11:31621-31630. [PMID: 35496868 PMCID: PMC9041629 DOI: 10.1039/d1ra06225e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 09/10/2021] [Indexed: 12/03/2022] Open
Abstract
A unique synthesis of polyhydroxylated pyrrolizidine alkaloids, namely (+)-hyacinthacine C3 and (+)-5-epi-hyacinthacine C3 is presented. The strategy relies on a 1,3-dipolar cycloaddition of an l-mannose derived nitrone, which owing to its great syn-stereoselectivity builds up the majority of the required stereocenters. The following key steps include Wittig olefination and iodine-mediated aminocyclisation, that provide two epimeric pyrrolizidines with the appropriate configuration. As a result, structure and steric arrangement of the first synthetically prepared (+)-hyacinthacine C3 are proved to be correct, clearly confirming the inconsistency with the stereochemistry assigned to the natural sample. With respect to the previously proven glycosidase inhibitory activities, the antiproliferative effect of (+)-hyacinthacine C3 and (+)-5-epi-hyacinthacine C3 was evaluated using several cell line models. A second total synthesis of (+)-hyacinthacine C3 is reported. As a result, structure of the first synthetically prepared alkaloid is proved to be correct, clearly confirming the inconsistency with the stereochemistry assigned to the natural sample.![]()
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Affiliation(s)
- Lívia Dikošová
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Barbora Otočková
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Tomáš Malatinský
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Jana Doháňošová
- Central Laboratories, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Mária Kopáčová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovak Republic
| | - Anna Ďurinová
- Charles University, Faculty of Pharmacy in Hradec Kralove, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - Lucie Smutná
- Charles University, Faculty of Pharmacy in Hradec Kralove, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - František Trejtnar
- Charles University, Faculty of Pharmacy in Hradec Kralove, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - Róbert Fischer
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
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Escolano M, Torres Fernández J, Rabasa-Alcañiz F, Sánchez-Roselló M, Pozo CD. Enantioselective Synthesis of Pyrrolizidinone Scaffolds through Multiple-Relay Catalysis. Org Lett 2020; 22:9433-9438. [PMID: 33253590 DOI: 10.1021/acs.orglett.0c03344] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A triple-tandem protocol for the synthesis of the pyrrolizidinone skeleton has been devised. It involves a cross metathesis-intramolecular aza-Michael reaction-intramolecular Michael addition tandem sequence, starting from N-pentenyl-4-oxo-2-alkenamides and conjugated ketones. In the presence of two cooperative catalysts, namely the second-generation Hoveyda-Grubbs catalyst and (R)-TRIP-derived BINOL phosphoric acid, this multiple-relay catalytic process takes place in good yields and outstanding levels of diastero- and enantioselectivity with the simultaneous generation of three contiguous stereocenters.
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Affiliation(s)
- Marcos Escolano
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain
| | - Javier Torres Fernández
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain
| | - Fernando Rabasa-Alcañiz
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain
| | - María Sánchez-Roselló
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain
| | - Carlos Del Pozo
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain
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29
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Kisielius V, Hama JR, Skrbic N, Hansen HCB, Strobel BW, Rasmussen LH. The invasive butterbur contaminates stream and seepage water in groundwater wells with toxic pyrrolizidine alkaloids. Sci Rep 2020; 10:19784. [PMID: 33188248 PMCID: PMC7666219 DOI: 10.1038/s41598-020-76586-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 10/30/2020] [Indexed: 12/21/2022] Open
Abstract
Pyrrolizidine alkaloids (PAs) are persistent mutagenic and carcinogenic compounds produced by many common plant species. Health authorities recommend minimising human exposure via food and medicinal products to ensure consumer health and safety. However, there is little awareness that PAs can contaminate water resources. Therefore, no regulations exist to limit PAs in drinking water. This study measured a PA base concentration of ~ 70 ng/L in stream water adjacent to an invasive PA-producing plant Petasites hybridus (Asteraceae). After intense rain the PA concentration increased tenfold. In addition, PAs measured up to 230 ng/L in seepage water from groundwater wells. The dominant PAs in both water types corresponded to the most abundant PAs in the plants (senkirkine, senecionine, senecionine N-oxide). The study presents the first discovery of persistent plant toxins in well water and their associated risks. In addition, it for the first time reports monocrotaline and monocrotaline N-oxide in Petasites sp.
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Affiliation(s)
- Vaidotas Kisielius
- Department of Technology, University College Copenhagen, Sigurdsgade 26, 2200, Copenhagen, Denmark.
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark.
| | - Jawameer R Hama
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
| | - Natasa Skrbic
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
- Greater Copenhagen Utility HOFOR, Ørestads Blvd. 35, 2300, Copenhagen, Denmark
| | - Hans Christian Bruun Hansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
| | - Bjarne W Strobel
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
| | - Lars Holm Rasmussen
- Department of Technology, University College Copenhagen, Sigurdsgade 26, 2200, Copenhagen, Denmark
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Toxin Degradation by Rumen Microorganisms: A Review. Toxins (Basel) 2020; 12:toxins12100664. [PMID: 33092236 PMCID: PMC7590051 DOI: 10.3390/toxins12100664] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 12/21/2022] Open
Abstract
Animal feeds may contain exogenous compounds that can induce toxicity when ruminants ingest them. These toxins are secondary metabolites originating from various sources including plants, bacteria, algae and fungi. Animal feed toxins are responsible for various animal poisonings which negatively impact the livestock industry. Poisoning is more frequently reported in newly exposed, naïve ruminants while ‘experienced’ ruminants are observed to better tolerate toxin-contaminated feed. Ruminants can possess detoxification ability through rumen microorganisms with the rumen microbiome able to adapt to utilise toxic secondary metabolites. The ability of rumen microorganisms to metabolise these toxins has been used as a basis for the development of preventative probiotics to confer resistance against the poisoning to naïve ruminants. In this review, detoxification of various toxins, which include plant toxins, cyanobacteria toxins and plant-associated fungal mycotoxins, by rumen microorganisms is discussed. The review will include clinical studies of the animal poisoning caused by these toxins, the toxin mechanism of action, toxin degradation by rumen microorganisms, reported and hypothesised detoxification mechanisms and identified toxin metabolites with their toxicity compared to their parent toxin. This review highlights the commercial potential of rumen inoculum derived probiotics as viable means of improving ruminant health and production.
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Moroz AA, Dmitriev MV, Maslivets AN. Synthesis of Spiro[pyrrole–pyrrolizidines] by 1,3-Dipolar Cycloaddition of Azomethine Ylides to 3-Ylidenepyrrol-2-ones. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020070076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Garbacz M, Stecko S. The Synthesis of Chiral Allyl Carbamates via Merger of Photoredox and Nickel Catalysis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000404] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mateusz Garbacz
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52, 01-224 Warsaw Poland
| | - Sebastian Stecko
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52, 01-224 Warsaw Poland
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Escalante CH, Martínez-Mora EI, Espinoza-Hicks C, Camacho-Dávila AA, Ramos-Morales FR, Delgado F, Tamariz J. Highly selective Diels-Alder and Heck arylation reactions in a divergent synthesis of isoindolo- and pyrrolo-fused polycyclic indoles from 2-formylpyrrole. Beilstein J Org Chem 2020; 16:1320-1334. [PMID: 32595780 PMCID: PMC7308616 DOI: 10.3762/bjoc.16.113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 05/28/2020] [Indexed: 01/01/2023] Open
Abstract
A highly regio-, chemo- and stereoselective divergent synthesis of isoindolo- and pyrrolo-fused polycyclic indoles is herein described, starting from 2-formylpyrrole and employing Diels-Alder and Heck arylation reactions. 3-(N-Benzyl-2-pyrrolyl)acrylates and 4-(pyrrol-2-yl)butenones underwent a highly endo-Diels-Alder cycloaddition with maleimides to furnish octahydropyrrolo[3,4-e]indoles, which served as precursors in the regioselective synthesis of aza-polycyclic skeletons via an intramolecular Heck arylation reaction. Through the latter reaction, the 3-(N-benzyl-2-pyrrolyl)acrylates give rise to 3-(pyrrolo[2,1-a]isoindol-3-yl)acrylates. A further oxidative aromatization of the polycyclic intermediates provides the corresponding polycyclic pyrrolo-isoindoles and isoindolo-pyrrolo-indoles. A theoretical study on the stereoselective Diels-Alder reactions, carried out by calculating the endo/exo transition states, revealed the assistance of non-covalent interactions in governing the endo stereocontrol.
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Affiliation(s)
- Carlos H Escalante
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Eder I Martínez-Mora
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Blvd. Venustiano Carranza e Ing. J. Cárdenas S/N, 25280 Saltillo, Coah., Mexico
| | - Carlos Espinoza-Hicks
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, 31125 Chihuahua, Chih., Mexico
| | - Alejandro A Camacho-Dávila
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, 31125 Chihuahua, Chih., Mexico
| | - Fernando R Ramos-Morales
- Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, Luis Castelazo Ayala S/N, 91190 Xalapa, Ver., Mexico
| | - Francisco Delgado
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Joaquín Tamariz
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
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Chen D, Yang M, Li J, Cui P, Su L, Shan Y, You J, Rojsitthisak P, Liu JB, Qiu G. Palladium-Catalyzed Cycloaddition of Alkynylimines, Double Isocyanides, and H 2O/KOAc. J Org Chem 2020; 85:6441-6449. [PMID: 32321251 DOI: 10.1021/acs.joc.0c00323] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In this work, a palladium-catalyzed cyclization of alkynylimines and double isocyanides is described. This facile procedure is efficient for synthesizing various 4-amidyl-2-aminopyrroles. Mechanism investigation indicates that a four-membered ring-fused pyrrole species is a key intermediate and the reaction involves [4 + 1] cycloaddition, protonation, nucleophilic addition, 1,4-addition of isocyanide, and rearomatization. Interestingly, the linear dipyrrole derivative is found to be an appropriate fluoride ion probe with a remarkable emission change, which could serve as a potential candidate for optoelectronic conjugated materials.
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Affiliation(s)
- Dianpeng Chen
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Min Yang
- Department of Forensic Science, Gannan Medical University, Ganzhou, Jiangxi 341000, China
| | - Jianming Li
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Peiying Cui
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Lei Su
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Yingying Shan
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Jinmao You
- Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Pornchai Rojsitthisak
- Department of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phayathai Road, Patumwan, Bangkok 10330, Thailand
| | - Jin-Biao Liu
- School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Guanyinsheng Qiu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China
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Klipkov AA, Sorochinsky AE, Tarasenko KV, Rusanova JA, Gerus II. Synthesis of trifluoromethyl and trifluoroacetyl substituted dihydropyrrolizines and tetrahydroindolizines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Avila C, Breakspear I, Hawrelak J, Salmond S, Evans S. A systematic review and quality assessment of case reports of adverse events for borage (Borago officinalis), coltsfoot (Tussilago farfara) and comfrey (Symphytum officinale). Fitoterapia 2020; 142:104519. [PMID: 32105669 DOI: 10.1016/j.fitote.2020.104519] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 12/14/2022]
Abstract
Symphytum officinale (comfrey), Tussilago farfara (coltsfoot) and Borago officinalis (borage) have long histories of therapeutic use, but their safety has been questioned due to the presence of unsaturated pyrrolizidine alkaloids (PAs). The evidence base underlying these concerns relies in part on case reports. This systematic review assesses these case reports for their reliability to inform this debate. METHOD Study selection was restricted to case reports describing possible pyrrolizidine alkaloid related harm and ingestion of comfrey, coltsfoot or borage. An extensive search of academic databases was conducted. Papers meeting the criteria were critically appraised. RESULTS The search resulted in 11 appropriate case reports, none of which involved borage. Nine reports were assessed for causality and indicated some degree of association between the material ingested and the adverse event. Lack of unequivocal identification of the species ingested compromised attribution and was a significant source of uncertainty. Three levels of identity confusions were found; misidentification or substitution at the level of the whole herb; omission of appropriate botanical identification and attribution of a specific PA to either comfrey or coltsfoot when it is a constituent found in other plants of established toxicity. CONCLUSION These cases are an unreliable body of evidence on which to draw conclusions about the safety of the oral consumption of Symphytum officinale and Tussilago farfara. Toxicological studies based on oral ingestion of phytochemically-complex preparations of these herbs may be the most accurate methodology for assessing clinical risk.
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Affiliation(s)
| | | | - Jason Hawrelak
- University of Tasmania, Australia; Australian Research Centre for Complementary and Integrative Medicine, University of Technology Sydney, Sydney, Australia
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38
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Lange M, Zi Y, Vilotijevic I. Enantioselective Synthesis of Pyrrolizin-1-ones via Lewis Base Catalyzed N-Allylation of N-Silyl Pyrrole Latent Nucleophiles. J Org Chem 2020; 85:1259-1269. [PMID: 31802664 DOI: 10.1021/acs.joc.9b02819] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Pyrrolizidine alkaloids and their derivatives often feature interesting biological activities. A class of substituted 2,3-dihydro-1H-pyrrolizin-1-one derivatives has been explored as a potential treatment for Alzheimer's disease, but enantioselective synthesis of these molecules is still elusive. We report that enantioselective N-allylation of N-silyl pyrrole latent nucleophiles with allylic fluorides followed by hydrogenation and diastereoselective Friedel-Crafts cyclization constitute an efficient synthetic route to access enantioenriched substituted 2,3-dihydro-1H-pyrrolizin-1-ones.
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Affiliation(s)
- Markus Lange
- Institute of Organic Chemistry and Macromolecular Chemistry , Friedrich Schiller University Jena , Humboldtstr.10 , 07743 Jena , Germany
| | - You Zi
- Institute of Organic Chemistry and Macromolecular Chemistry , Friedrich Schiller University Jena , Humboldtstr.10 , 07743 Jena , Germany
| | - Ivan Vilotijevic
- Institute of Organic Chemistry and Macromolecular Chemistry , Friedrich Schiller University Jena , Humboldtstr.10 , 07743 Jena , Germany
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39
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Cremosnik GS, Liu J, Waldmann H. Guided by evolution: from biology oriented synthesis to pseudo natural products. Nat Prod Rep 2020; 37:1497-1510. [DOI: 10.1039/d0np00015a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review provides an overview and historical context to two concepts for the design of natural product-inspired compound libraries and highlights the used synthetic methodologies.
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Affiliation(s)
- Gregor S. Cremosnik
- Department of Chemical Biology
- Max-Planck-Institute of Molecular Physiology
- 44227 Dortmund
- Germany
| | - Jie Liu
- Department of Chemical Biology
- Max-Planck-Institute of Molecular Physiology
- 44227 Dortmund
- Germany
- Faculty of Chemistry and Chemical Biology
| | - Herbert Waldmann
- Department of Chemical Biology
- Max-Planck-Institute of Molecular Physiology
- 44227 Dortmund
- Germany
- Faculty of Chemistry and Chemical Biology
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Analysis of alkaloids (indole alkaloids, isoquinoline alkaloids, tropane alkaloids). RECENT ADVANCES IN NATURAL PRODUCTS ANALYSIS 2020. [PMCID: PMC7153348 DOI: 10.1016/b978-0-12-816455-6.00015-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Design, synthesis and cytotoxicity of the antitumor agent 1-azabicycles for chemoresistant glioblastoma cells. Invest New Drugs 2019; 38:1257-1271. [PMID: 31838735 DOI: 10.1007/s10637-019-00877-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
Abstract
Twelve multi-functional pyrrolizidinones, indolizidinones and pyrroliazepinones were prepared from formal aza-[3 + 2] and aza-[3 + 3] cycloadditions of five- to seven-membered heterocyclic enaminones as diverse ambident electrophiles. The antitumor activity of these alkaloid-like compounds was investigated through an initial screening performed on human glioblastoma multiform (GBM) cell lines (GL-15, U251), on murine glioma cells line (C6) and on normal glial cells. Of the compounds tested, the new pyrrolo[1,2a]azepinone, [ethyl (3-oxo-1,2-diphenyl-6,7,8,9-tetrahydro-3H-pyrrolo[1,2a]azepin-9a(5H)-yl)acetate] or (Compound-13) exhibited selective cytotoxic effects on GBM-temozolomide resistant cells. Compound-13 exerted dose-dependent cytotoxic activity by promoting arrest of cells in the G0/G1 phase of the cell cycle in the first 24 h. The apoptotic effect observed was in a time-dependent manner. Anti-migratory effect promoted by the treatment with compound-13 was also observed. Moreover, healthy mixed glial cell cultures from rat brain exhibited no cytotoxicity effect upon exposure to compound-13. Thus, the present study paves the way for the use of compound-13 as novel antitumor scaffold candidate for glioma cell therapy.
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Jovanovic M, Petkovic M, Jovanovic P, Simic M, Tasic G, Eric S, Savic V. Proline Derived Bicyclic Derivatives through Metal Catalysed Cyclisations of Allenes: Synthesis of Longamide B, Stylisine D and their Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Milos Jovanovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Milos Petkovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Predrag Jovanovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Milena Simic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Gordana Tasic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Slavica Eric
- Faculty of Pharmacy; Department of Pharmaceutical Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Vladimir Savic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
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Hashemi SA, Mohammadizadeh MR. Catalyst‐Free Efficient Synthesis of Alkyl Acetates Bearing Arylsulfide and Quinoxaline Moieties and Stereoselective Synthesis of Dialkyl 2‐Amino‐3‐thiomalates at Room Temperature. ChemistrySelect 2019. [DOI: 10.1002/slct.201901287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | - Mohammad Reza Mohammadizadeh
- Department of ChemistryFaculty of SciencesPersian Gulf University Bushehr 75169 Iran
- Oil and Gas Research CenterPersian Gulf University Bushehr 75169 Iran
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Mao ZY, Liu YW, Ma RJ, Ye JL, Si CM, Wei BG, Lin GQ. Divergent synthesis of N-heterocyclic 1,6-enynes through a zinc-catalyzed decarboxylative A 3 reaction. Chem Commun (Camb) 2019; 55:14170-14173. [PMID: 31701971 DOI: 10.1039/c9cc06985b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A zinc-catalyzed decarboxylative A3 reaction of cyclic amino acids, α,β-unsaturated aldehydes and terminal alkynes has been developed. A series of functionalized N-heterocyclic 1,6-enynes have been successfully obtained with excellent regioselectivities through this novel approach. In addition, the utility of this straightforward process is demonstrated by the preparation of a polycyclic nitrogen-containing heterocyclic compound.
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Affiliation(s)
- Zhuo-Ya Mao
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, 201203, China.
| | - Yi-Wen Liu
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, 201203, China.
| | - Rui-Jun Ma
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, 201203, China.
| | - Jian-Liang Ye
- College of Chemistry and Chemical Engineering and the Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, 201203, China.
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, 201203, China.
| | - Guo-Qiang Lin
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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Shan Y, Li J, Zhao Y, Chen D, Li Q, You J. A Copper‐Catalyzed Three‐Component Reaction for the Preparation of Polysubstituted Pyrroles from Alkynyl Ketones, Amines and Isocyanoacetates. ChemistrySelect 2019. [DOI: 10.1002/slct.201902968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yingying Shan
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
| | - Jianming Li
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
| | - Yutong Zhao
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
| | - Dianpeng Chen
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
| | - Qinyu Li
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
| | - Jinmao You
- Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong China
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Synthesis of Novel 2-(Het)arylpyrrolidine Derivatives and Evaluation of Their Anticancer and Anti-Biofilm Activity. Molecules 2019; 24:molecules24173086. [PMID: 31450696 PMCID: PMC6749236 DOI: 10.3390/molecules24173086] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/16/2019] [Accepted: 08/22/2019] [Indexed: 12/26/2022] Open
Abstract
A library of novel 2-(het)arylpyrrolidine-1-carboxamides were obtained via a modular approach based on the intramolecular cyclization/Mannich-type reaction of N-(4,4-diethoxybutyl)ureas. Their anti-cancer activities both in vitro and in vivo were tested. The in vitro activity of some compounds towards M-Hela tumor cell lines was twice that of the reference drug tamoxifen, whereas cytotoxicity towards normal Chang liver cell did not exceed the tamoxifen toxicity. In vivo studies showed that the number of surviving animals on day 60 of observation was up to 83% and increased life span (ILS) was up to 447%. Additionally, some pyrrolidine-1-carboxamides possessing a benzofuroxan moiety obtained were found to effectively suppress bacterial biofilm growth. Thus, these compounds are promising candidates for further development both as anti-cancer and anti-bacterial agents.
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Smolobochkin AV, Rizbayeva TS, Gazizov AS, Voronina JK, Dobrynin AB, Gildebrant AV, Strelnik AG, Sazykin IS, Burilov AR, Pudovik MA, Sazykina MA. Acid-Catalyzed Intramolecular Imination / Nucleophilic Trapping of 4-Aminobutanal Derivatives: One-Pot Access to 2-(Pyrazolyl)pyrrolidines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900868] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Andrey V. Smolobochkin
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Tanzilya S. Rizbayeva
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Almir S. Gazizov
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Julia K. Voronina
- FRC Kazan Scientific Center; N. S. Kurnakov Institute of General and Inorganic Chemistry, RAS; 31 Leninsky Av. 119991 Moscow Russian Federation
| | - Alexey B. Dobrynin
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
- FRC Kazan Scientific Center; Kazan National Research Technical University; 10 Karl Marx Str. 420111 Kazan Russian Federation
| | - Anastasiya V. Gildebrant
- FRC Kazan Scientific Center; Southern Federal University; 194/2, Stachki Avenue 344090 Rostov-on-Don Russian Federation
| | - Anna G. Strelnik
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Ivan S. Sazykin
- FRC Kazan Scientific Center; Southern Federal University; 194/2, Stachki Avenue 344090 Rostov-on-Don Russian Federation
| | - Alexander R. Burilov
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Michail A. Pudovik
- Arbuzov Institute of Organic and Physical Chemistry; FRC Kazan Scientific Center; Russian Academy of Sciences; Arbuzova str., 8 420088 Kazan Russian Federation
| | - Marina A. Sazykina
- FRC Kazan Scientific Center; Southern Federal University; 194/2, Stachki Avenue 344090 Rostov-on-Don Russian Federation
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48
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Filatov AS, Wang S, Khoroshilova OV, Lozovskiy SV, Larina AG, Boitsov VM, Stepakov AV. Stereo- and Regioselective 1,3-Dipolar Cycloaddition of the Stable Ninhydrin-Derived Azomethine Ylide to Cyclopropenes: Trapping of Unstable Cyclopropene Dipolarophiles. J Org Chem 2019; 84:7017-7036. [PMID: 31066276 DOI: 10.1021/acs.joc.9b00753] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereo- and regioselective 1,3-dipolar cycloaddition of the stable ninhydrin-derived azomethine ylide [2-(3,4-dihydro-2 H-pyrrolium-1-yl)-1-oxo-1 H-inden-3-olate, DHPO] to differently substituted cyclopropenes has been established. As a result, an efficient synthetic protocol was developed for the preparation of biologically relevant spiro[cyclopropa[ a]pyrrolizine-2,2'-indene] derivatives. DHPO has proved to be an effective trap for such highly reactive and unstable substrates as parent cyclopropene, 1-methylcyclopropene, 1-phenylcyclopropene, and 1-halo-2-phenylcyclopropenes. It has also been found that 3-nitro-1,2-diphenylcyclopropene undergoes a nucleophilic substitution reaction in alcohols and thiols to afford 3-alkoxy- and 3-arylthio-substituted 1,2-diphenylcyclopropenes, which can be captured as corresponding 1,3-dipolar cycloadducts in the presence of DHPO. These new approaches provide a straightforward strategy for the synthesis of functionally substituted cyclopropa[ a]pyrrolizine derivatives. The factors governing regio- and stereoselectivity have been revealed by means of quantum mechanical calculations (M11 density functional theory), including previously unreported Nylide- Hcyclopropene second-orbital interactions. The outcome of this work contributes to the study of 1,3-dipolar cycloaddition, as well as enriches chemistry of cyclopropenes and methods for the construction of polycyclic compounds with cyclopropane fragments.
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Affiliation(s)
- Alexander S Filatov
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Siqi Wang
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Olesya V Khoroshilova
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Stanislav V Lozovskiy
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Anna G Larina
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Vitali M Boitsov
- Saint Petersburg Academic University , ul. Khlopina 8/3 , 194021 St. Petersburg , Russian Federation.,Pavlov First Saint Petersburg State Medical University , ul. L'va Tolstogo 6/8 , 197022 St. Petersburg , Russian Federation
| | - Alexander V Stepakov
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation.,Saint Petersburg State Institute of Technology , Moskovskii pr. 26 , 190013 St. Petersburg , Russian Federation
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49
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Zhao K, Yamashita K, Carpenter JE, Sherwood TC, Ewing WR, Cheng PTW, Knowles RR. Catalytic Ring Expansions of Cyclic Alcohols Enabled by Proton-Coupled Electron Transfer. J Am Chem Soc 2019; 141:8752-8757. [PMID: 31117664 DOI: 10.1021/jacs.9b03973] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here a catalytic method for the modular ring expansion of cyclic aliphatic alcohols. In this work, proton-coupled electron transfer activation of an allylic alcohol substrate affords an alkoxy radical intermediate that undergoes subsequent C-C bond cleavage to furnish an enone and a tethered alkyl radical. Recombination of this alkyl radical with the revealed olefin acceptor in turn produces a ring-expanded ketone product. The regioselectivity of this C-C bond-forming event can be reliably controlled via substituents on the olefin substrate, providing a means to convert a simple N-membered ring substrate to either n+1 or n+2 ring adducts in a selective fashion.
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Affiliation(s)
- Kuo Zhao
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Kenji Yamashita
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Joseph E Carpenter
- Discovery Chemistry , Bristol-Myers Squibb Co. , Princeton , New Jersey 08543 , United States
| | - Trevor C Sherwood
- Discovery Chemistry , Bristol-Myers Squibb Co. , Princeton , New Jersey 08543 , United States
| | - William R Ewing
- Discovery Chemistry , Bristol-Myers Squibb Co. , Princeton , New Jersey 08543 , United States
| | - Peter T W Cheng
- Discovery Chemistry , Bristol-Myers Squibb Co. , Princeton , New Jersey 08543 , United States
| | - Robert R Knowles
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
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50
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Shibuya M, Kawano S, Fujita S, Yamamoto Y. Boron‐Catalyzed Hydroamination/Hydroallylation and Hydroamination/Hydrocyanation of Unactivated Alkynes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900165] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Masatoshi Shibuya
- Department of Basic Medicinal SciencesGraduate School of Pharmaceutical SciencesNagoya University Furo-cho, Chikusa Nagoya 464-8601 Japan
| | - Shohei Kawano
- Department of Basic Medicinal SciencesGraduate School of Pharmaceutical SciencesNagoya University Furo-cho, Chikusa Nagoya 464-8601 Japan
| | - Shoji Fujita
- Department of Basic Medicinal SciencesGraduate School of Pharmaceutical SciencesNagoya University Furo-cho, Chikusa Nagoya 464-8601 Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal SciencesGraduate School of Pharmaceutical SciencesNagoya University Furo-cho, Chikusa Nagoya 464-8601 Japan
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