1
|
Chen CH, Yang Y, Ke JP, Yang Z, Li JY, Zhang YX, Liu G, Liu Z, Yao G, Bao GH. Novel Flavonol Alkaloids in Green Tea: Synthesis, Detection, and Anti-Alzheimer's Disease Effect in a Transgenic Caenorhabditis elegans CL4176 Model. J Agric Food Chem 2024; 72:3695-3706. [PMID: 38324412 DOI: 10.1021/acs.jafc.3c06608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Novel N-ethy-2-pyrrolidinone-substituted flavonols, myricetin alkaloids A-C (1-3), quercetin alkaloids A-C (4a, 4b, and 5), and kaempferol alkaloids A and B (6 and 7), were prepared from thermal reaction products of myricetin, quercetin, kaempferol─l-theanine, respectively. We used HPLC-ESI-HRMS/MS to detect 1-7 in 14 cultivars of green tea and found that they were all present in "Shuchazao," "Longjing 43", "Fudingdabai", and "Zhongcha 108" green teas. The structures of 1-4 and 6 were determined by extensive 1D and 2D NMR spectroscopies. These flavonol alkaloids along with their skeletal flavonols were assessed for anti-Alzheimer's disease effect based on molecular docking, acetylcholinesterase inhibition, and the transgenic Caenorhabditis elegans CL4176 model. Compound 7 strongly binds to the protein amyloid β (Aβ1-42) through hydrogen bonds (BE: -9.5 kcal/mol, Ki: 114.3 nM). Compound 3 (100 μM) is the strongest one in significantly extending the mean lifespan (13.4 ± 0.5 d, 43.0% promotion), delaying the Aβ1-42-induced paralysis (PT50: 40.7 ± 1.9 h, 17.1% promotion), enhancing the locomotion (140.0% promotion at 48 h), and alleviating glutamic acid (Glu)-induced neurotoxicity (153.5% promotion at 48 h) of CL4176 worms (p < 0.0001).
Collapse
Affiliation(s)
- Chen-Hui Chen
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Yi Yang
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Jia-Ping Ke
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Zi Yang
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Jia-Yi Li
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Yu-Xing Zhang
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Guangjin Liu
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| | - Zhijun Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Guangmin Yao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Guan-Hu Bao
- Natural Products Laboratory, International Joint Laboratory of Tea Chemistry and Healthy Effects, State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, Anhui, China
| |
Collapse
|
2
|
Ntalouka F, Tsirivakou A. Luteolin: A promising natural agent in management of pain in chronic conditions. Front Pain Res (Lausanne) 2023; 4:1114428. [PMID: 36937566 PMCID: PMC10016360 DOI: 10.3389/fpain.2023.1114428] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/13/2023] [Indexed: 03/04/2023] Open
Abstract
Pain due to chronic conditions is a frequent and insufficiently addressed problem. Current drug options for pain management (either in cases of chronic inflammatory conditions or neuropathy) do not adequately treat pain. Moreover, they are associated with important adverse events in long term use. Luteolin is a flavonoid widely present in the plant kingdom and its sources have been assembled in a comprehensive list of this paper. Luteolin has shown in several research studies a range of pharmacological properties; anti-inflammatory, antioxidant, neuroprotective, and analgesic. In this article, we summarize the effects and potential benefits from introducing luteolin as an adjuvant agent in established protocols for pain management. We review the most indicative in vivo and in vitro evidence of how luteolin can target the molecular pathways involved in pathogenesis of chronic inflammatory and neuropathic pain. The data reviewed strongly support luteolin's promising benefits in pain management and raise the need for further clinical trials that can establish its role in clinical practice.
Collapse
|
3
|
Siow A, Tasma Z, Walker CS, Brimble MA, Harris PWR. Synthesis and development of seven-membered constrained cyclic urea based PSMA inhibitors via RCM. NEW J CHEM 2022. [DOI: 10.1039/d2nj01016j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Intramolecular ring-closing metathesis on an N,N-diallyl Glu-urea-Gly substrate affords 7-membered cyclic ureas as inhibitors of prostrate specific membrane antigen (PMSA).
Collapse
Affiliation(s)
- Andrew Siow
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Zoe Tasma
- School of Biological Sciences, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
| | - Christopher S. Walker
- School of Biological Sciences, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
- School of Biological Sciences, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
| | - Paul. W. R. Harris
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
- School of Biological Sciences, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3A Symonds Street, Auckland 1010, New Zealand
| |
Collapse
|
4
|
Yu XC, Zhang CC, Wang LT, Li JZ, Li T, Wei WT. The synthesis of seven- and eight-membered rings by radical strategies. Org Chem Front 2022. [DOI: 10.1039/d2qo00774f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical strategies for preparation of seven- or eight-membered rings.
Collapse
Affiliation(s)
- Xuan-Chi Yu
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Can-Can Zhang
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Ling-Tao Wang
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Jiao-Zhe Li
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan, 473061, China
| | - Wen-Ting Wei
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| |
Collapse
|
5
|
Kawazoe R, Matsuo Y, Saito Y, Tanaka T. Computationally Assisted Structural Revision of Flavoalkaloids with a Seven-Membered Ring: Aquiledine, Isoaquiledine, and Cheliensisine. J Nat Prod 2020; 83:3347-3353. [PMID: 33081470 DOI: 10.1021/acs.jnatprod.0c00691] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aquiledine and cheliensisine are flavoalkaloids isolated from Aquilegia ecalcarata and Goniothalamus cheliensis, respectively. Different structures have been proposed for these flavoalkaloids; however, their 1H and 13C NMR spectroscopic data were virtually identical. In this study, the structures of aquiledine and cheliensisine were revised on the basis of the DFT calculation of NMR data including DP4+ and J-DP4 analysis, as well as specific rotations. Similarly, the structure of isoaquiledine, a regioisomer of aquiledine, was also revised. A biosynthetic pathway of these flavoalkaloids is proposed.
Collapse
Affiliation(s)
- Rina Kawazoe
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Yosuke Matsuo
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Yoshinori Saito
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Takashi Tanaka
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| |
Collapse
|
6
|
Nagai T, Mimata N, Terada Y, Sebe C, Shigehisa H. Catalytic Dealkylative Synthesis of Cyclic Carbamates and Ureas via Hydrogen Atom Transfer and Radical-Polar Crossover. Org Lett 2020; 22:5522-5527. [PMID: 32633527 DOI: 10.1021/acs.orglett.0c01872] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Guided by the transition-metal hydrogen atom transfer and radical-polar crossover concepts, we developed a functional-group-tolerant and scalable method for the synthesis of cyclic carbamates and ureas, which are found in the structures of bioactive compounds. This method provides not only a common five-membered ring but also six-to-eight-membered ring products. The reaction proceeds through the intramolecular displacement of an alkylcobalt(IV) intermediate and dealkylation by 2,4,6-collidine; the activation energies of these steps were calculated by DFT.
Collapse
Affiliation(s)
- Takuya Nagai
- Faculty of Pharmacy, Musashino University 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Nao Mimata
- Faculty of Pharmacy, Musashino University 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Yoshihiro Terada
- Faculty of Pharmacy, Musashino University 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Chikayoshi Sebe
- Faculty of Pharmacy, Musashino University 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hiroki Shigehisa
- Faculty of Pharmacy, Musashino University 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| |
Collapse
|
7
|
Bakthadoss M, Agarwal V, Tadiparthi TR, Mohammad M. Domino ring opening and selective O/S-alkylation of cyclic ethers and thioethers. Mol Divers 2020; 25:2467-2478. [PMID: 32462464 DOI: 10.1007/s11030-020-10105-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
Abstract
Chemoselective domino ring opening and selective O/S-alkylation of ethers/thioethers over enol C/O alkylation has been observed. Various 2-aryl chromanones/thiochromanones with alkyl/allyl bromides were smoothly converted into the corresponding highly functionalized ethers and thioethers in excellent yields with high selectivity. An unusual, chemoselective domino ring opening and selective ether/thioether O/S-alkylation over. An unusual, chemoselective domino ring opening and selective ether/thioether O/S alkylation over enol C/O alkylation has been observed.
Collapse
Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India.
| | - Vishal Agarwal
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
| | | | - Mushaf Mohammad
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
| |
Collapse
|
8
|
Zhang H, Tian P, Ma L, Zhou Y, Jiang C, Lin X, Xiao X. Remote Directed Isocyanation of Unactivated C(sp3)–H Bonds: Forging Seven-Membered Cyclic Ureas Enabled by Copper Catalysis. Org Lett 2020; 22:997-1002. [DOI: 10.1021/acs.orglett.9b04542] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hongwei Zhang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Peiyuan Tian
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Lishuang Ma
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Yulu Zhou
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Cuiyu Jiang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Xufeng Lin
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Xiao Xiao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, People’s Republic of China
| |
Collapse
|
9
|
|
10
|
|
11
|
Bakthadoss M, Kumar PV, Reddy TS. Ruthenium-Catalyzed, Keto-Directed, Site-Selective C-H Activation of Diverse Chromanones with Alkenes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700513] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Polu Vijay Kumar
- Department of Chemistry; Pondicherry University; 605014 Puducherry India
| | | |
Collapse
|
12
|
Abstract
The flavoalkaloids possess unique molecular frameworks that contain both a flavonoid and alkaloid component. Flavoalkaloids result from the convergence of distinct biosynthetic pathways, affording natural products that display a wide range of interesting biological activities that would not be expected for flavonoids or alkaloids alone. This chapter collates all the known flavoalkaloids up until early 2016, detailing their isolation, bioactivity, and successful total syntheses.
Collapse
|
13
|
Kumari P, Jakhar A, Khan NUH, Tak R, Kureshy RI, Abdi SH, Bajaj HC. Recyclable chiral dinuclear copper(II) complexes catalyzed asymmetric Friedel–Crafts alkylation of 1-naphthol using N-tosyl aldimine. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2015.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
14
|
Takizawa S, Hirata S, Murai K, Fujioka H, Sasai H. C3-Symmetric chiral trisimidazoline-catalyzed Friedel–Crafts (FC)-type reaction. Org Biomol Chem 2014; 12:5827-30. [DOI: 10.1039/c4ob00925h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The first imidazoline-catalyzed enantioselective Friedel–Crafts (FC)-type reaction was established using C3-symmetric chiral trisimidazolines.
Collapse
Affiliation(s)
- Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR)
- Osaka University
- Ibaraki-shi, Japan
| | - Shuichi Hirata
- The Institute of Scientific and Industrial Research (ISIR)
- Osaka University
- Ibaraki-shi, Japan
| | - Kenichi Murai
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita-shi, Japan
| | - Hiromichi Fujioka
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita-shi, Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR)
- Osaka University
- Ibaraki-shi, Japan
| |
Collapse
|
15
|
Arama DP, Lisowski V, Scarlata E, Fulcrand P, Maillard LT, Martinez J, Masurier N. An efficient synthesis of pyrido-imidazodiazepinediones. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Takizawa S, Arteaga FA, Yoshida Y, Kodera J, Nagata Y, Sasai H. Vanadium-catalyzed enantioselective Friedel–Crafts-type reactions. Dalton Trans 2013; 42:11787-90. [DOI: 10.1039/c2dt32202a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Li GX, Qu J. Enantioselective Friedel–Crafts reactions between phenols and N-tosylaldimines catalyzed by a leucine-derived bifunctional catalyst. Chem Commun (Camb) 2012; 48:5518-20. [DOI: 10.1039/c2cc31735d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Abstract
The chromone and flavonoid alkaloids represent an unusual group of structurally diverse secondary metabolites, derived from the convergence of multiple biosynthetic pathways that are widely distributed through the plant and animal kingdoms. Many of them have been discovered through bioassay-guided chemical investigations of traditional medicines, suggesting potential therapeutic significance. Their unique structures and varied pharmacological activities may provide important new leads for the discovery of drugs with novel mechanisms of action. Potential therapeutic indications are as diverse as cancer and viral infections, inflammation and immunomodulation, neurological and psychiatric conditions, and diabetes.
Collapse
Affiliation(s)
- Shahriar Khadem
- Natural Health Products Directorate, Health Products and Food Branch, Health Canada, 2936 Baseline Road, Ottawa, Ontario, K1A 0K9, Canada.
| | | |
Collapse
|
19
|
Affiliation(s)
- Nigel C Veitch
- Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW93AB, UK.
| | | |
Collapse
|
20
|
Jang DS, Lee GY, Lee YM, Kim YS, Sun H, Kim DH, Kim JS. Flavan-3-ols Having a .GAMMA.-Lactam from the Roots of Actinidia arguta Inhibit the Formation of Advanced Glycation End Products in Vitro. Chem Pharm Bull (Tokyo) 2009; 57:397-400. [DOI: 10.1248/cpb.57.397] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Dae Sik Jang
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine
| | - Ga Young Lee
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine
| | - Yun Mi Lee
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine
| | - Young Sook Kim
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine
| | - Hang Sun
- Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences
| | - Dong-Hee Kim
- College of Oriental Medicine, Daejeon University
| | - Jin Sook Kim
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine
| |
Collapse
|
21
|
Cao S, Norris A, Miller JS, Ratovoson F, Birkinshaw C, Andriantsiferana R, Rasamison VE, Rakotonandrasana S, Kingston DGI. Cytotoxic compounds of Physena madagascariensis from the Madagascar rain forest paragraph sign. Nat Prod Res 2007; 20:1157-63. [PMID: 17127502 DOI: 10.1080/14786410600885596] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Two new flavanones, remangiflavanones D and E (1 and 2), were isolated from an extract of the twigs, leaves, and flowers of Physena madagascariensis together with three known flavanones, remangiflavanones A-C (3-5), and (E)-N-feruloyltyramine (6). The structures of the new compounds 1 and 2 were established on the basis of one-dimensional and two-dimensional NMR spectroscopic data interpretation. All compounds were evaluated for their cytotoxicity in the A2780 human ovarian cancer cell line. Compound 5 was the most active with an IC50 value of 2.5 microg mL-1.
Collapse
Affiliation(s)
- Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Radulović N, Dekić M, Zlatković B, Dekić S, Dekić V, Palić R. A detailed analysis of volatile constituents of Aquilegia pancicii Degen, a Serbian steno-endemic species. Chemical Papers 2007; 61. [DOI: 10.2478/s11696-007-0055-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AbstractChemical composition of the essential oil of Aquilegia pancicii Degen endemic to Serbia is reported. Essential oil obtained by hydrodistillation from the aerial parts was analyzed by GC and GC/MS. The major constituents were hexadecanoic acid (24.3 %) and hexahydrofarnesyl acetone (14.1 %), among 130 identified compounds, representing 90.3 % of the total essential oil. The oil was marked by the presence of 69 fatty acid derivatives and low content of terpenoids representing 60.4 % and 7.8 % of the oil, respectively.
Collapse
|
23
|
Hirayama C, Ono H, Tamura Y, Nakamura M. C-prolinylquercetins from the yellow cocoon shell of the silkworm, Bombyx mori. Phytochemistry 2006; 67:579-83. [PMID: 16430932 DOI: 10.1016/j.phytochem.2005.11.030] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Accepted: 11/26/2005] [Indexed: 05/06/2023]
Abstract
Two flavonoids containing the l-proline moiety, 6-C-[(2S,5S)-prolin-5-yl] quercetin (prolinalin A) and 6-C-[(2S,5R)-prolin-5-yl] quercetin (prolinalin B), were isolated from the cocoon shell of the silkworm, Bombyx mori. Their structural elucidation was achieved by application of acid hydrolysis and spectroscopic methods. These compounds were not found in the leaves of mulberry (Morus alba L.), the host plant of the silkworm, suggesting that the flavonoids are metabolites of the insect. This is the first time that flavonoids with an amino acid moiety have been found as naturally occurring compounds.
Collapse
Affiliation(s)
- Chikara Hirayama
- National Institute of Agrobiological Sciences, 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan.
| | | | | | | |
Collapse
|
24
|
Bremner JB. Chapter 7 Seven-membered rings. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0959-6380(03)80019-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
25
|
Kanchanapoom T, Kasai R, Chumsri P, Kraisintu K, Yamasaki K. Lotthanongine, an unprecedented flavonoidal indole alkaloid from the roots of Thai medicinal plant, Trigonostemon reidioides. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00445-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|