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Meng LH, Awakawa T, Li XM, Quan Z, Yang SQ, Wang BG, Abe I. Discovery of (±)-Penindolenes Reveals an Unusual Indole Ring Cleavage Pathway Catalyzed by P450 Monooxygenase. Angew Chem Int Ed Engl 2024; 63:e202403963. [PMID: 38635317 DOI: 10.1002/anie.202403963] [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: 02/27/2024] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 04/19/2024]
Abstract
(±)-Penindolenes A-D (1-4), the first representatives of indole terpenoids featuring a γ-lactam skeleton, were isolated from the mangrove-derived endophytic fungus Penicillium brocae MA-231. Our bioactivity tests revealed their potent antimicrobial and acetylcholinesterase inhibitory activities. The biosynthetic reactions by the five enzymes PbaABCDE leading to γ-lactam ring formation were identified with heterologous expression and in vitro enzymatic assays. Remarkably, the cytochrome P450 monooxygenase PbaB and its homolog in Aspergillus oryzae catalyzed the 2,3-cleavage of the indole ring to generate two keto groups in 1. This is the first example of the oxidative cleavage of indole by a P450 monooxygenase. In addition, rare secondary amide bond formation by the glutamine synthetase-like enzyme PbaD was reported. These findings will contribute to the engineered biosynthesis of unnatural, bioactive indole terpenoids.
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Affiliation(s)
- Ling-Hong Meng
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, and Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Nanhai Road 7, Qingdao, 266071, China
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takayoshi Awakawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- RIKEN Center for Sustainable Resource Science 2-1, Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Xiao-Ming Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, and Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Nanhai Road 7, Qingdao, 266071, China
| | - Zhiyang Quan
- RIKEN Center for Sustainable Resource Science 2-1, Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Sui-Qun Yang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, and Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Nanhai Road 7, Qingdao, 266071, China
| | - Bin-Gui Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, and Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Nanhai Road 7, Qingdao, 266071, China
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
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2
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Barras BJ, Ling T, Rivas F. Recent Advances in Chemistry and Antioxidant/Anticancer Biology of Monoterpene and Meroterpenoid Natural Product. Molecules 2024; 29:279. [PMID: 38202861 PMCID: PMC10780832 DOI: 10.3390/molecules29010279] [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: 11/23/2023] [Revised: 12/14/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Monoterpenes and meroterpenes are two large classes of isoprene-based molecules produced by terrestrial plants and unicellular organisms as diverse secondary metabolites. The global rising incidence of cancer has led to a renewed interest in natural products. These monoterpenes and meroterpenes represent a novel source of molecular scaffolds that can serve as medicinal chemistry platforms for the development of potential preclinical leads. Furthermore, some of these natural products are either abundant, or their synthetic strategies are scalable as it will be indicated here, facilitating their derivatization to expand their scope in drug discovery. This review is a collection of representative updates (from 2016-2023) in biologically active monoterpene and meroterpenoid natural products and focuses on the recent findings of the pharmacological potential of these bioactive compounds as well as the newly developed synthetic strategies employed to access them. Particular emphasis will be placed on the anticancer and antioxidant potential of these compounds in order to raise knowledge for further investigations into the development of potential anti-cancer therapeutics. The mounting experimental evidence from various research groups across the globe regarding the use of these natural products at pre-clinical levels, renders them a fast-track research area worth of attention.
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Affiliation(s)
| | - Taotao Ling
- Department of Chemistry, Louisiana State University, 133 Choppin Hall, Baton Rouge, LA 70803, USA;
| | - Fatima Rivas
- Department of Chemistry, Louisiana State University, 133 Choppin Hall, Baton Rouge, LA 70803, USA;
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Song JG, Liu JX, Huang RL, Tang W, Huang XJ, Wang Y, Ye WC. Tautomeric cinnamoylphloroglucinol-monoterpene adducts from Cleistocalyx operculatus and their antiviral activities. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024; 26:38-51. [PMID: 38190257 DOI: 10.1080/10286020.2023.2288290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 11/22/2023] [Indexed: 01/10/2024]
Abstract
Guided by 1H NMR spectroscopic experiments using the characteristic enol proton signals as probes, three pairs of new tautomeric cinnamoylphloroglucinol-monoterpene adducts (1-3) were isolated from the buds of Cleistocalyx operculatus. Their structures with absolute configurations were established by spectroscopic analysis, modified Mosher's method, and quantum chemical electronic circular dichroism calculation. Compounds 1-3 represent a novel class of cinnamoylphloroglucinol-monoterpene adducts featuring an unusual C-4-C-1' linkage between 2,2,4-trimethyl-cinnamyl-β-triketone and modified linear monoterpenoid motifs. Notably, compounds 1-3 exhibited significant in vitro antiviral activity against respiratory syncytial virus (RSV).
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Affiliation(s)
- Jian-Guo Song
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jia-Xin Liu
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Rui-Li Huang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wei Tang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Xiao-Jun Huang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Ying Wang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wen-Cai Ye
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
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4
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Luo EE, Liu SN, Wang ZJ, Chen LY, Liang CQ, Yu MY, Qin XJ. Oligomeric phloroglucinols with hAChE inhibitory and antibacterial activities from tropic Rhodomyrtus tomentosa. Bioorg Chem 2023; 141:106836. [PMID: 37774436 DOI: 10.1016/j.bioorg.2023.106836] [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: 06/30/2023] [Revised: 08/19/2023] [Accepted: 09/03/2023] [Indexed: 10/01/2023]
Abstract
Alzheimer's diseases (AD) and other infectious diseases caused by drug-resistance bacteria have posed a serious threat to human lives and global health. With the aim to search for human acetylcholinesterase (hAChE) inhibitors and antibacterial agents from medicinal plants, 16 phloroglucinol oligomers, including two new phloroglucinol monomers (1a and 1b), four new phloroglucinol dimers (3a, 3b, 4b, and 5a), six new phloroglucinol trimers (6a, 6b, 7a, 7b, 8a, and 8b), and two naturally occurring phloroglucinol monomers (2a and 2b), along with two known congeners (4a and 5b), were purified from the leaves of tropic Rhodomyrtus tomentosa. The structures and absolute configurations of these new isolates were unequivocally established by comprehensive analyses of their spectroscopic data (NMR and HRESIMS), ECD calculation, and single crystal X-ray diffraction. Structurally, 3a/3b shared a rare C-5' formyl group, whereas 6a/6b possessed a unique C-7' aromatic ring. In addition, 7a/7b and 8a/8b were rare phloroglucinol trimers with a bis-furan and a C-6' hemiketal group. Pharmacologically, the mixture of 3a and 3b showed the most potent human acetylcholinesterase (hAChE) inhibitory activity with an IC50 value of 1.21 ± 0.16 μM. The molecular docking studies of 3a and 3b in the hAChE binding sites were performed, displaying good agreement with the in vitro inhibitory effects. In addition, the mixture of 3a and 3b displayed the most significant anti-MRSA (methicillin-resistant Staphylococcus aureus) with MIC and MBC values of both 0.50 μg/mL, and scanning electron microscope (SEM) studies revealed that they could destroy the biofilm structures of MRSA. The findings provide potential candidates for the further development of anti-AD and anti-bacterial agents.
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Affiliation(s)
- E-E Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Si-Na Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhao-Jie Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan Characteristic Plant Extraction Laboratory, School of Chemical Science and Technology, Yunnan University, Kunming 650500, People's Republic of China
| | - Ling-Yun Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; College of Pharmacy, Guilin Medical University, Guilin 541199, People's Republic of China
| | - Cheng-Qin Liang
- College of Pharmacy, Guilin Medical University, Guilin 541199, People's Republic of China
| | - Mu-Yuan Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China.
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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5
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Gu JH, Liu JS, Lin JH, Liu F, Wu ZL, Zheng YR, Ye WC, Wang L. Five New Phenylpropanoyl Phloroglucinol Derivatives from Leptospermum scoparium. Chem Biodivers 2023; 20:e202201111. [PMID: 36546830 DOI: 10.1002/cbdv.202201111] [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: 11/22/2022] [Revised: 12/19/2022] [Accepted: 12/22/2022] [Indexed: 12/24/2022]
Abstract
Leptosperols C-G (1-5), five new phenylpropanoyl phloroglucinol derivatives were isolated from the leaves of Leptospermum scoparium. Compounds 1-3 are phenylpropanoyl phloroglucinol-sesquiterpene adducts with new carbon skeletons. Their structures with absolute configurations were elucidated by detailed spectroscopic analyses, single-crystal X-ray diffraction, and electronic circular dichroism (ECD) calculation. Compounds 2 and 3 exhibited moderate anti-inflammatory activity in zebrafish acute inflammatory models.
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Affiliation(s)
- Ji-Hong Gu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, P. R. China
| | - Jun-Shan Liu
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, P. R. China
| | - Jia-Hui Lin
- Center for Bioactive Natural Molecules and Innovative Drugs Research, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China
| | - Fen Liu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China
| | - Zhen-Long Wu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China
| | - Yuan-Ru Zheng
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, P. R. China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China
| | - Lei Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China
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6
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Roy P, Krishna AV, Ramachary DB. Direct Organocatalytic Reductive Alkylation of Syncarpic Acid: Scope and Applications. J Org Chem 2022; 87:16026-16038. [PMID: 36367306 DOI: 10.1021/acs.joc.2c02164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Biologically important 4-alkylsyncarpic acids, which resemble the core structure of many natural products, were synthesized in one-pot through the organocatalytic three-component reductive alkylation with excellent yields and C-selectivity. Synthetic applications of 4-alkylsyncarpic acids were demonstrated by converting into the functionally rich molecules through different reactions like Michael, retro-Michael, reduction, and oxidation reactions. In a continuation, formal total synthesis of (±)-triumphalone, (±)-isotriumphalone, and monomeric phloroglucinol derivatives was reported in a few steps starting from 4-alkylsyncarpic acids in overall very good yields. Further showcasing the importance of C-alkylated products, 4-benzylsyncarpic acid and its Michael adduct with methyl vinyl ketone were synthesized in a gram scale without compromising rate/yields.
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Affiliation(s)
- Pritam Roy
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Anugam V Krishna
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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7
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Yu MY, Liu SN, Luo EE, Jin Q, Liu H, Liu HY, Luo XD, Qin XJ. Phloroglucinols with hAChE and α-glucosidase inhibitory activities from the leaves of tropic Rhodomyrtus tomentosa. PHYTOCHEMISTRY 2022; 203:113394. [PMID: 36007662 DOI: 10.1016/j.phytochem.2022.113394] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Four undescribed phloroglucinol meroterpenoids, rhodotomentodiones A-D, and one undescribed phloroglucinol dimer, rhodotomentodimer A, were obtained and structurally established from tropic Rhodomyrtus tomentosa leaves. Their structures were unambiguously elucidated based on the comprehensive analyses of the NMR and MS spectroscopic data, electronic circular dichroism (ECD) calculation, and single-crystal X-ray diffraction. In particular, rhodotomentodiones A and B represent the first examples of phloroglucinol meroterpenoids featuring a unique γ-pyranoid moiety. More importantly, rhodotomentodimer A exhibited the most potential human acetylcholinesterase (hAChE) and α-glucosidase inhibitory effects with IC50 values of 7.5 μM and 5.6 μM, respectively. The possible interaction sites of the above potential hAChE and α-glucosidase inhibitor were achieved by molecular docking studies. These findings greatly enrich the diversity of natural products from Myrtaceae species, and provide potential candidates for the further development of anti-Alzheimer and antidiabetic diseases.
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Affiliation(s)
- Mu-Yuan Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Si-Na Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - E-E Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Qing Jin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
| | - Xiao-Dong Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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8
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Fuloria NK, Raheja RK, Shah KH, Oza MJ, Kulkarni YA, Subramaniyan V, Sekar M, Fuloria S. Biological activities of meroterpenoids isolated from different sources. Front Pharmacol 2022; 13:830103. [PMID: 36199687 PMCID: PMC9527340 DOI: 10.3389/fphar.2022.830103] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
Meroterpenoids are natural products synthesized by unicellular organisms such as bacteria and multicellular organisms such as fungi, plants, and animals, including those of marine origin. Structurally, these compounds exhibit a wide diversity depending upon the origin and the biosynthetic pathway they emerge from. This diversity in structural features imparts a wide spectrum of biological activity to meroterpenoids. Based on the biosynthetic pathway of origin, these compounds are either polyketide-terpenoids or non-polyketide terpenoids. The recent surge of interest in meroterpenoids has led to a systematic screening of these compounds for many biological actions. Different meroterpenoids have been recorded for a broad range of operations, such as anti-cholinesterase, COX-2 inhibitory, anti-leishmanial, anti-diabetic, anti-oxidative, anti-inflammatory, anti-neoplastic, anti-bacterial, antimalarial, anti-viral, anti-obesity, and insecticidal activity. Meroterpenoids also possess inhibitory activity against the expression of nitric oxide, TNF- α, and other inflammatory mediators. These compounds also show renal protective, cardioprotective, and neuroprotective activities. The present review includes literature from 1999 to date and discusses 590 biologically active meroterpenoids, of which 231 are from fungal sources, 212 are from various species of plants, and 147 are from marine sources such as algae and sponges.
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Affiliation(s)
| | | | - Kaushal H. Shah
- SVKM’s Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Manisha J. Oza
- SVKM’s Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Yogesh A. Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, Mumbai, India
| | | | - Mahendran Sekar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Royal College of Medicine Perak, Universiti Kuala Lumpur, Ipoh, Malaysia
| | - Shivkanya Fuloria
- Faculty of Pharmacy, AIMST University, Bedong, Malaysia
- *Correspondence: Shivkanya Fuloria,
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Phang YL, Liu S, Zheng C, Xu H. Recent advances in the synthesis of natural products containing the phloroglucinol motif. Nat Prod Rep 2022; 39:1766-1802. [PMID: 35762867 DOI: 10.1039/d1np00077b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Covering: June 2009 to 2021Natural products containing a phloroglucinol motif include simple and oligomeric phloroglucinols, polycyclic polyprenylated acylphloroglucinols, phloroglucinol-terpenes, xanthones, flavonoids, and coumarins. These compounds represent a major class of secondary metabolites which exhibit a wide range of biological activities such as antimicrobial, anti-inflammatory, antioxidant and hypoglycaemic properties. A number of these compounds have been authorized for therapeutic use or are currently being studied in clinical trials. Their structural diversity and utility in both traditional and conventional medicine have made them popular synthetic targets over the years. In this review, we compile and summarise the recent synthetic approaches to the natural products bearing a phloroglucinol motif. Focus has been given on ingenious strategies to functionalize the phloroglucinol moiety at multiple positions. The isolation and bioactivities of the compounds are also provided.
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Affiliation(s)
- Yee Lin Phang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Song Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongxi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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Hua M, Song J, Huang X, Fan H, Wu T, Meng Q, Zhang Z, Han B. Highly efficient C(CO)-C(alkyl) bond cleavage in ketones to access esters over ultrathin N-doped carbon nanosheets. Chem Sci 2022; 13:5196-5204. [PMID: 35655547 PMCID: PMC9093174 DOI: 10.1039/d2sc00579d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 04/11/2022] [Indexed: 12/26/2022] Open
Abstract
Selective oxidative cleavage of the C(CO)–C bond in ketones to access esters is a highly attractive strategy for upgrading ketones. However, it remains a great challenge to realize this important transformation over heterogeneous metal-free catalysts. Herein, we designed a series of porous and ultrathin N-doped carbon nanosheets (denoted as CN-X, where X represents the pyrolysis temperature) as heterogeneous metal-free catalysts. It was observed that the fabricated CN-800 could efficiently catalyze the oxidative cleavage of the C(CO)–C bond in various ketones to generate the corresponding methyl esters at 130 °C without using any additional base. Detailed investigations revealed that the higher content and electron density of the graphitic-N species contributed to the excellent performance of CN-800. Besides, the high surface area, affording active sites that are more easily accessed, could also enhance the catalytic activity. Notably, the catalysts have great potential for practical applications because of some obvious advantages, such as low cost, neutral reaction conditions, heterogeneous nature, high efficiency, and broad ketone scope. To the best of our knowledge, this is the first work on efficient synthesis of methyl esters via oxidative esterification of ketones over heterogeneous metal-free catalysts. Ultrathin and metal-free N-doped carbon nanosheets showed high activity and selectivity for oxidative esterification of ketones via C(CO)–C bond cleavage to access methyl esters.![]()
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Affiliation(s)
- Manli Hua
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,School of Chemistry Engineering, University of Chinese Academy of Sciences Beijing 100049 China
| | - Jinliang Song
- School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
| | - Xin Huang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,School of Chemistry Engineering, University of Chinese Academy of Sciences Beijing 100049 China
| | - Honglei Fan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Tianbin Wu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Qinglei Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Zhanrong Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,School of Chemistry Engineering, University of Chinese Academy of Sciences Beijing 100049 China
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11
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Deng LM, Tang W, Wang SQ, Song JG, Huang XJ, Zhu HY, Li YL, Ye WC, Hu LJ, Wang Y. Discovery and Biomimetic Synthesis of a Polycyclic Polymethylated Phloroglucinol Collection from Rhodomyrtus tomentosa. J Org Chem 2022; 87:4788-4800. [PMID: 35319897 DOI: 10.1021/acs.joc.2c00071] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Inspired by a previously reported biomimetic synthesis study, four new naturally occurring phloroglucinol trimers 1-4 with unusual 6/5/5/6/6/6-fused hexacyclic ring systems, along with two known analogues (5 and 6) and two known biogenetically related dimers (10 and 11), were isolated from Rhodomyrtus tomentosa. Their structures and absolute configurations were unambiguously elucidated by spectroscopic analysis, X-ray diffraction, and electronic circular dichroism calculation. By mimicking two potentially alternative biosynthetic pathways, the first asymmetric syntheses of 1-4 and the racemic syntheses of 5 and 6 were achieved in only five to six steps without the need for protecting groups. Furthermore, phloroglucinol dimers 10 and 11 exhibited significant in vitro antiviral activity against the respiratory syncytial virus.
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Affiliation(s)
- Lu-Ming Deng
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei Tang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Shu-Qin Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jian-Guo Song
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Hao-Yue Zhu
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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12
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Stakanovs G, Belyakov S, Jirgensons A, Rasina D. Convergent biomimetic semisynthesis of disesquiterpenoid rumphellolide J. Org Biomol Chem 2022; 20:2455-2461. [PMID: 35254363 DOI: 10.1039/d2ob00238h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The convergent biomimetic gram-scale synthesis of disesquiterpenoid ester rumphellolide J is described. 4β,8β-Epoxycaryophyllan-5-ol was prepared in 67% yield (1.4 g) from naturally ambudant (-)-β-caryophyllene. (+)-Rumphellaoic acid A was obtained in 46% yield (2.2 g) from (-)-caryophyllene oxide. The synthesised (+)-rumphellaoic acid had an opposite specific rotation compared to that of (-)-rumphellaoic acid A isolated from nature, indicating possible occurrence of (+)-β-caryophyllene in Rumphella antipathies and Psidium guajava. Esterification of (+)-rumphellaoic acid A via acyl fluoride and alkoxide of 4β,8β-epoxycaryophyllan-5-ol gave rumphellolide J in 70% yield (1.65 g). The same structure for the synthesized product and natural isolate was proven despite the opposite specific rotation value of the intermediate acid. The short access to the terpenoids provides a material for further investigations of biological activities and valuable reference standards for the analysis of the chemical composition of various natural sources.
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Affiliation(s)
- Georgijs Stakanovs
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, LV-1006, Riga, Latvia.
| | - Sergey Belyakov
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, LV-1006, Riga, Latvia.
| | - Aigars Jirgensons
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, LV-1006, Riga, Latvia.
| | - Dace Rasina
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, LV-1006, Riga, Latvia.
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13
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Zhou T, Zheng A, Huo L, Li C, Tan H, Wang S, Chen H. Total syntheses of ericifolione and its analogues via a biomimetic inverse-electron-demand Diels-Alder reaction. Chem Commun (Camb) 2021; 58:270-273. [PMID: 34878459 DOI: 10.1039/d1cc06361h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Driven by bioinspiration and appreciation of the structure of ericifolione, a biomimetic tautomerization/intermolecular inverse-electron-demand hetero Diels-Alder reaction cascade sequence promoted by sodium acetate to rapidly construct sterically hindered dihydropyran scaffolds was established, which allowed the first straightforward biomimetic total syntheses of ericifolione and its analogues with high simplicity. Moreover, this methodology set the stage for the preparation of relevant natural products or derivatives.
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Affiliation(s)
- Tingting Zhou
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China. .,Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Anquan Zheng
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China. .,Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Luqiong Huo
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Changgeng Li
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China.
| | - Haibo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Sasa Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China. .,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Centre for Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning 530006, People's Republic of China
| | - Huiyu Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China. .,School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, People's Republic of China
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14
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Yu MY, Liu SN, Liu H, Meng QH, Qin XJ, Liu HY. Acylphloroglucinol trimers from Callistemon salignus seeds: Isolation, configurational assignment, hAChE inhibitory effects, and molecular docking studies. Bioorg Chem 2021; 117:105404. [PMID: 34749116 DOI: 10.1016/j.bioorg.2021.105404] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/28/2021] [Accepted: 10/02/2021] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease (AD) diagnoses are greatly increasing in frequency as the global population ages, highlighting an urgent need for new anti-AD strategies. With the aim to search for human acetylcholinesterase (hAChE) inhibitors from the species of Myrtaceae family, ten acylphloroglucinol trimers (APTs), including eight new APTs, callistemontrimers A-H (1a, 1b, 2a, 2b, 3a, 3b, 4b, and 5b), and two naturally occurring ones (4a and 5a), along with one reported triketone-acylphloroglucinol-monoterpene adduct (6), were obtained and structurally characterized from the hAChE inhibitory acetone extract of Callistemon salignus seeds. The structures and their absolute configurations for new APTs were unequivocally established via the detailed interpretation of extensive spectroscopic data (HRESIMS and NMR), ECD calculations, and single crystal X-ray diffraction, whereas the absolute configurations of known APTs were determined by further chiral separation, and calculated ECD calculations. The results of hAChE inhibitory assay revealed that an enantiomeric mixture of 2a/2b, 2a, and 2b are good hAChE inhibitors with IC50 values of 1.22 ± 0.23, 2.28 ± 0.19, and 4.96 ± 0.39 μM, respectively. Molecular docking was used to uncover the modes of interactions for bioactive compounds with the active site of hAChE. In addition, 2 and 6 displayed moderate neurite outgrowth-promoting effects with differentiation rates of 6.16% and 6.19% at a concentration of 1.0 μM, respectively.
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Affiliation(s)
- Mu-Yuan Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Si-Na Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Qing-Hong Meng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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15
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Mo QH, Yan MQ, Zhou XL, Luo Q, Huang XS, Liang CQ. Phloroglucinol derivatives rhotomensones A-G from Rhodomyrtus tomentosa. PHYTOCHEMISTRY 2021; 190:112890. [PMID: 34388480 DOI: 10.1016/j.phytochem.2021.112890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/18/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Undescribed phloroglucinol derivatives, rhotomensones A-G, and a known derivative rhodomyrtosone B, were isolated from the leaves of Rhodomyrtus tomentosa. Rhotomensones A-D and G have unreported structural characteristics, in which rhotomensone A substitutes a benzene ring, rhotomensones B-D are bonded with a 2-methylbutanoyl group, and rhotomensone G has two fewer carbons. The structures of these compounds were determined by NMR spectroscopy, circular dichroism (CD) spectroscopy and X-ray crystallography. The inhibitory activities against α-glucosidase of rhotomensones E and F were evaluated in vitro, with IC50 values of 0.50 ± 0.14 mg/mL and 0.07 ± 0.02 mg/mL. Moreover, rhodomyrtosone B showed significant antibacterial activity against some bacteria, with MIC values ranging from 0.50 to 16.00 μg/mL.
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Affiliation(s)
- Qing-Hu Mo
- College of Pharmacy, Guilin Medical University, Guilin, 541199, PR China
| | - Meng-Qi Yan
- College of Pharmacy, Guilin Medical University, Guilin, 541199, PR China
| | - Xian-Li Zhou
- College of Biotechnology, Guilin Medical University, Guilin, 541199, PR China.
| | - Qin Luo
- Science Experiment Center, Guilin Medical University, Guilin, 541199, PR China
| | - Xi-Shan Huang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin, 541004, PR China.
| | - Cheng-Qin Liang
- College of Pharmacy, Guilin Medical University, Guilin, 541199, PR China.
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16
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Jiang M, Wu Z, Liu L, Chen S. The chemistry and biology of fungal meroterpenoids (2009-2019). Org Biomol Chem 2021; 19:1644-1704. [PMID: 33320161 DOI: 10.1039/d0ob02162h] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Fungal meroterpenoids are secondary metabolites from mixed terpene-biosynthetic origins. Their intriguing chemical structural diversification and complexity, potential bioactivities, and pharmacological significance make them attractive targets in natural product chemistry, organic synthesis, and biosynthesis. This review provides a systematic overview of the isolation, chemical structural features, biological activities, and fungal biodiversity of 1585 novel meroterpenoids from 79 genera terrestrial and marine-derived fungi including macrofungi, Basidiomycetes, in 441 research papers in 2009-2019. Based on the nonterpenoid starting moiety in their biosynthesis pathway, meroterpenoids were classified into four categories (polyketide-terpenoid, indole-, shikimate-, and miscellaneous-) with polyketide-terpenoids (mainly tetraketide-) and shikimate-terpenoids as the primary source. Basidiomycota produced 37.5% of meroterpenoids, mostly shikimate-terpenoids. The genera of Ganoderma, Penicillium, Aspergillus, and Stachybotrys are the four dominant producers. Moreover, about 56% of meroterpenoids display various pronounced bioactivities, including cytotoxicity, enzyme inhibition, antibacterial, anti-inflammatory, antiviral, antifungal activities. It's exciting that several meroterpenoids including antroquinonol and 4-acetyl antroquinonol B were developed into phase II clinically used drugs. We assume that the chemical diversity and therapeutic potential of these fungal meroterpenoids will provide biologists and medicinal chemists with a large promising sustainable treasure-trove for drug discovery.
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Affiliation(s)
- Minghua Jiang
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China. and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510006, China
| | - Zhenger Wu
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Lan Liu
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China. and Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510006, China
| | - Senhua Chen
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China. and Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China and South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510006, China
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17
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A New Isoflavonoid from Roots of Alangium chinense. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03440-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Zhang G, Alshreimi AS, Alonso L, Antar A, Yu H, Islam SM, Anderson LL. Nitrone and Alkyne Cascade Reactions for Regio‐ and Diastereoselective 1‐Pyrroline Synthesis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Laura Alonso
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Alan Antar
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Hsien‐Cheng Yu
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
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19
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Zhang G, Alshreimi AS, Alonso L, Antar A, Yu HC, Islam SM, Anderson LL. Nitrone and Alkyne Cascade Reactions for Regio- and Diastereoselective 1-Pyrroline Synthesis. Angew Chem Int Ed Engl 2021; 60:13089-13097. [PMID: 33763941 DOI: 10.1002/anie.202101511] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/06/2021] [Indexed: 12/22/2022]
Abstract
The synthesis of 1-pyrrolines from N-alkenylnitrones and alkynes has been explored as a retrosynthetic alternative to traditional approaches. These cascade reactions are formal [4+1] cycloadditions that proceed through a proposed dipolar cycloaddition and N-alkenylisoxazoline [3,3']-sigmatropic rearrangement. A variety of cyclic alkynes and terminal alkynes have been shown to undergo the transformation with N-alkenylnitrones under mild conditions to provide the corresponding spirocyclic and densely substituted 1-pyrrolines with high regio- and diastereoselectivity. Mechanistic studies provide insight into the balance of steric and electronic effects that promote the cascade process and control the diastereo- and regioisomeric preferences of the 1-pyrroline products. Diastereoselective derivatization of the 1-pyrrolines prepared by the cascade reaction demonstrate the divergent synthetic utility of the new method.
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Affiliation(s)
- Guanqun Zhang
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Abdullah S Alshreimi
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Laura Alonso
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Alan Antar
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Hsien-Cheng Yu
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Shahidul M Islam
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Laura L Anderson
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
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20
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Deng LM, Hu LJ, Bai YTZ, Wang J, Qin GQ, Song QY, Su JC, Huang XJ, Jiang RW, Tang W, Li YL, Li CC, Ye WC, Wang Y. Rhodomentosones A and B: Two Pairs of Enantiomeric Phloroglucinol Trimers from Rhodomyrtus tomentosa and Their Asymmetric Biomimetic Synthesis. Org Lett 2021; 23:4499-4504. [PMID: 34032453 DOI: 10.1021/acs.orglett.1c01616] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Rhodomentosones A and B (1 and 2), two pairs of novel enantiomeric phloroglucinol trimers featuring a unique 6/5/5/6/5/5/6-fused ring system were isolated from Rhodomyrtus tomentosa. Their structures with absolute configurations were elucidated by NMR spectroscopy, X-ray crystallography, and ECD calculation. The bioinspired syntheses of 1 and 2 were achieved in six steps featuring an organocatalytic asymmetric dehydroxylation/Michael addition/Kornblum-DeLaMare rearrangement/ketalization cascade reaction. Compounds 1 and 2 exhibited promising antiviral activities against respiratory syncytial virus (RSV).
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Affiliation(s)
- Lu-Ming Deng
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yang-Ting-Zhi Bai
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jie Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Guan-Qiu Qin
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Qiao-Yun Song
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jun-Cheng Su
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ren-Wang Jiang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei Tang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Chuang-Chuang Li
- Department of Chemistry, Southern University of Science & Technology, Shenzhen 518055, People's Republic of China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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21
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Arya A, Chahal R, Rao R, Rahman MH, Kaushik D, Akhtar MF, Saleem A, Khalifa SMA, El-Seedi HR, Kamel M, Albadrani GM, Abdel-Daim MM, Mittal V. Acetylcholinesterase Inhibitory Potential of Various Sesquiterpene Analogues for Alzheimer's Disease Therapy. Biomolecules 2021; 11:350. [PMID: 33669097 PMCID: PMC7996600 DOI: 10.3390/biom11030350] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 01/08/2023] Open
Abstract
Alzheimer's disease (AD) is a gradually growing irreversible illness of the brain that almost affects every fifth person (aged > 80 years) in the world. World Health Organization (WHO) also revealed that the prevalence of this disease will enhance (upto double) significantly upto 2030. The poor cholinergic transmission at the synapse is considered to be one of the main reasons behind the progression and occurrence of this disorder. Natural inhibitors of acetylcholine (ACh) such as galanthamine and rivastigmine are used commercially in the treatmentof AD. The biomolecules such assesquiterpenes, possess a great structural diversity and are responsible for a plethora of pharmacological properties. The potential of various sesquiterpenes as anticholinesterase has been reviewed in this article. For this purpose, the various databases, mainly PubMed, Scopus, and Web of Science were investigatedwith different keywords such as "sesquiterpenes+acetylcholinesterase" and "sesquiterpenes+cholinesterase+inhibitors" in the surveyed time frame (2010-2020). A vast literature was evident in the last decade, which affirms the potential of various sesquiterpenes in the improvement of cholinergic transmission by inhibiting the AChE. After data analysis, it was found that 12 compounds out of a total of 58 sesquiterpenes were reported to possess IC50 < 9μM and can be considered as potential candidates for the improvement of learning and memory. Sesquiterpene is an important category of terpenoids, found to possess a large spectrum of biological activities. The outcome of the review clearly states that sesquiterpenes (such as amberboin, lipidiol,etc) from herbs could offer fresh, functional compounds for possible prevention and treatment of AD.
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Affiliation(s)
- Ashwani Arya
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana-124001, India
| | - Rubal Chahal
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana-124001, India
| | - Rekha Rao
- Department of Pharmaceutical Sciences, Guru Jambeshwar University of Science & Technology, Hisar, Haryana-125001, India
| | - Md Habibur Rahman
- Department of Pharmacy, Southeast University, Banani, Dhaka-1213, Bangladesh
- Department of Global Medical Science, Wonju College of Medicine, Yonsei University, Wonju 26384, Korea
| | - Deepak Kaushik
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana-124001, India
| | - Muhammad Furqan Akhtar
- Riphah Institute of Pharmaceutical Sciences, Lahore Campus, Riphah International University, Lahore 54000, Pakistan
| | - Ammara Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Shaden M A Khalifa
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, S-106 91 Stockholm, Sweden
| | - Hesham R El-Seedi
- Pharmacognosy Group, Department of Medicinal Chemistry, Uppsala University, Biomedical Centre, Box 574, 751 23 Uppsala, Sweden
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China
- Department of Chemistry, Faculty of Science, Menoufia University, Shebin El-Kom 32512, Egypt
| | - Mohamed Kamel
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
| | - Ghadeer M Albadrani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11474, Saudi Arabia
| | - Mohamed M Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Vineet Mittal
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana-124001, India
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22
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Peng X, Su H, Wang H, Hu G, Hu K, Zhou L, Qiu M. Applanmerotic acids A and B, two meroterpenoid dimers with an unprecedented polycyclic skeleton from Ganoderma applanatum that inhibit formyl peptide receptor 2. Org Chem Front 2021. [DOI: 10.1039/d1qo00294e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Applanmerotic acids A and B (1 and 2) with a polycyclic skeleton isolated from Ganoderma applantum showed anti-inflammatory activity via inhibiting the activation of FPR2.
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Affiliation(s)
- Xingrong Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
| | - Haiguo Su
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
| | - Huirong Wang
- Department of Biology
- Southern University of Science and Technology
- Shenzhen
- China
| | - Guilin Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
| | - Kun Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
| | - Lin Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
| | - Minghua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Science
- Kunming 650201
- People's Republic of China
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23
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Deng LM, Hu LJ, Tang W, Liu JX, Huang XJ, Li YY, Li YL, Ye WC, Wang Y. A biomimetic synthesis-enabled stereochemical assignment of rhodotomentones A and B, two unusual caryophyllene-derived meroterpenoids from Rhodomyrtus tomentosa. Org Chem Front 2021. [DOI: 10.1039/d1qo00989c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Rhodotomentones A and B (1 and 2), two unusual caryophyllene-derived meroterpenoids (CDMTs) featuring a rare 6/6/9/4/6/6 hexacyclic ring system, along with their biogenetically-related CDMTs 7 and 12–15, were isolated from Rhodomyrtus tomentosa.
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Affiliation(s)
- Lu-Ming Deng
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei Tang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jia-Xin Liu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yue-Yue Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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24
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Polymethylated acylphloroglucinols from Rhodomyrtus tomentosa exert acetylcholinesterase inhibitory effects. Bioorg Chem 2020; 107:104519. [PMID: 33293058 DOI: 10.1016/j.bioorg.2020.104519] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 11/22/2022]
Abstract
Chemical investigation of the twigs and leaves of Rhodomyrtus tomentosa led to the isolation and structural identification of a novel polymethylated phloroglucinol meroterpenoid (PPM) featuring a 6/6/6/6 tetracyclic system, rhotomentodione F (1), five new polymethylated polycyclic phloroglucinols (PPPs) with a rare bis-furan framework, rhotomentosones A-E (2-6), and one new adduct composed of an acylphloroglucinol and two β-triketone units, rhotomentosone F (7), as well as five known analogues (8-12). Their structures and absolute configurations were unambiguously determined by comprehensive spectroscopic data and electronic circular dichroism (ECD) calculations. All isolates were evaluated for their anti-inflammatory and acetylcholinesterase (AChE) inhibitory activities. Compound 6 displayed significant AChE inhibitory effect with an IC50 value of 8.68 μM. Further molecular docking studies of 6 revealed that the interactions with AChE residues Ser125, Glu202, and Tyr133 are crucial for AChE inhibitory activity. The current study not only enriches the chemical diversity of phloroglucinols in Myrtaceae species, but also provides potential lead compounds for the further design and development of new AChE inhibitors to treat Alzheimer's disease.
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25
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Xu WJ, Xie X, Wu L, Tian XM, Wang CC, Kong LY, Luo J. Cajuputones A-C, β-Triketone Flavanone Hybrids from the Branches and Leaves of Melaleuca cajuputi. Chem Biodivers 2020; 17:e2000706. [PMID: 33026163 DOI: 10.1002/cbdv.202000706] [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: 08/25/2020] [Accepted: 10/01/2020] [Indexed: 01/21/2023]
Abstract
Three new β-triketone flavanone hybrids, cajuputones A-C were obtained from Melaleuca cajuputi (the Australian 'tea tree'). The structures of cajuputones A-C were elucidated by 1D/2D NMR spectroscopy and HR-ESI-MS analyses; and their absolute configurations were established by electric circular dichroism (ECD) calculations using TDDFT method. Structurally, cajuputones A-C feature a rare 6/6/6/6 oxatetracyclic ring system fused between an acylphloroglucinol-derived β-triketone and a pinocembrin or strobopinin moiety via an angle-type pyran-like motif. DFT-based conformational optimization in chloroform explained the similarity of the 1D NMR data of cajuputones B and C (C-2 epimers).
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Affiliation(s)
- Wen-Jun Xu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Xin Xie
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Lin Wu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Xiao-Meng Tian
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Cheng-Cheng Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Jun Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
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26
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Vieira de Castro T, Yahiaoui O, Peralta RA, Fallon T, Lee V, George JH. Biomimetic Synthesis Enables the Structure Revision of Littordials E and F and Drychampone B. Org Lett 2020; 22:8161-8166. [DOI: 10.1021/acs.orglett.0c03156] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Oussama Yahiaoui
- Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia
| | - Ricardo A. Peralta
- Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia
| | - Thomas Fallon
- Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia
| | - Victor Lee
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Jonathan H. George
- Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia
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27
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Zhang X, Dong C, Wu G, Huo L, Yuan Y, Hu Y, Liu H, Tan H. The Biomimetic Total Syntheses of the Antiplasmodial Tomentosones A and B. Org Lett 2020; 22:8007-8011. [PMID: 33017154 DOI: 10.1021/acs.orglett.0c02943] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The first biomimetic total syntheses of natural phloroglucinols tomentosones A and B and their analogues have been accomplished. The synthetic strategy primarily referred to the potential biosynthetic precursors and their possible sequence of segments assembly by chemological evolution of the structural entities and enabled rapid access of the titled compounds in a practical fashion.
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Affiliation(s)
- Xiao Zhang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Institute of Tropical Medicine, Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, People's Republic of China
| | - Chunmao Dong
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, People's Republic of China
| | - Guiyun Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Institute of Tropical Medicine, Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, People's Republic of China
| | - Luqiong Huo
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Yunfei Yuan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Yingjie Hu
- Institute of Tropical Medicine, Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, People's Republic of China
| | - Hongxin Liu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Haibo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.,Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, People's Republic of China
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28
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Zhan R, Li D, Liu YL, Xie XY, Chen L, Shao LD, Wang WJ, Chen YG. Structural elucidation, bio-inspired synthesis, and biological activities of cyclic diarylpropanes from Horsfieldia kingii. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131494] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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29
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Liu H, Li P, Bi L, Wu W, Yan H, He L, Qin X, Liu H. Polymethylated Phloroglucinol Meroterpenoids from
Rhodomyrtus tomentosa
and Their Antibacterial and Acetylcholinesterase Inhibitory Effects. Chem Biodivers 2020; 17:e2000489. [PMID: 32761773 DOI: 10.1002/cbdv.202000489] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/03/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Ping Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
- School of Chemical Science and Technology Yunnan University Kunming 650224 P. R. China
| | - Li‐Sha Bi
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Wen‐Juan Wu
- Department of Dermatology The First Affiliated Hospital of Kunming Medical University Kunming 650032 P. R. China
| | - Huan Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - Li He
- Department of Dermatology The First Affiliated Hospital of Kunming Medical University Kunming 650032 P. R. China
| | - Xu‐Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - Hai‐Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
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30
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Liu H, He XZ, Feng MY, Yuan-Zeng, Rauwolf TJ, Shao LD, Ni W, Yan H, Porco JA, Hao XJ, Qin XJ, Liu HY. Acylphloroglucinols with acetylcholinesterase inhibitory effects from the fruits of Eucalyptus robusta. Bioorg Chem 2020; 103:104127. [PMID: 32745755 PMCID: PMC7596769 DOI: 10.1016/j.bioorg.2020.104127] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/18/2020] [Accepted: 07/19/2020] [Indexed: 12/14/2022]
Abstract
Eleven new acylphloroglucinols, including six new formylated phloroglucinol-monoterpene meroterpenoids, eucalyprobusals A-F (1-6), one monomeric acylphloroglucinol, eucalyprobusone B (7), and four dimeric acylphloroglucinols, eucalyprobusones C-F (8-11) were purified from the fruits of Eucalyptus robusta. The establishment of the structures of 1-11 was achieved by a combination of NMR and HRESIMS data analyses, electron circular dichroism (ECD), and single-crystal X-ray diffraction. Compounds 6, 8, and an inseparable mixture of 10 and 11 were found to be potent AChE inhibitors with IC50 values of 3.22 ± 0.36, 3.82 ± 0.22, and 2.55 ± 0.28 μΜ, respectively. Possible interaction sites of 6, 8, 10, and 11 with AChE were investigated by means of molecular docking studies, and the results revealed that AChE residues Asn87, Ser125, Thr83, Tyr133, Tyr124, Tyr337, and Tyr341 played crucial roles in the observed activity of the aforementioned compounds.
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Affiliation(s)
- Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xiao-Zhi He
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Mi-Yan Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Yuan-Zeng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Tyler J Rauwolf
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States
| | - Li-Dong Shao
- Department of Traditional Chinese Medicine, Yunnan University of Chinese Medicine, Kunming 650500, People's Republic of China
| | - Wei Ni
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Hui Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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31
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Yuan HL, Zhao YL, Ding CF, Zhu PF, Jin Q, Liu YP, Ding ZT, Luo XD. Anti-inflammatory and antinociceptive effects of Curcuma kwangsiensis and its bioactive terpenoids in vivo and in vitro. JOURNAL OF ETHNOPHARMACOLOGY 2020; 259:112935. [PMID: 32387235 DOI: 10.1016/j.jep.2020.112935] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE "Curcumae Radix", the dried rhizomes of Curcuma kwangsiensis documented in Chinese pharmacopoeia, has been traditionally used for the treatment of inflammatory and pain diseases, such as jaundice and red urine, cleaning the heart-fire and depression, arthralgia, and dysmenorrhea. However, according to literature surveys, anti-inflammatory and antinociceptive studies of C. kwangsiensis have been seldom reported so far. AIM OF THE STUDY The current study focuses on the anti-inflammatory and antinociceptive effects of C. kwangsiensis and discovering the bioactive compounds for its traditional usages both in vivo and in vitro, which could provide scientific justification about its traditional use. MATERIAL AND METHODS The anti-inflammatory and antinociceptive assays of various layers (ME, EA, AQS) from C. kwangsiensis were achieved by carrageenan-induced paw edema and acetic acid-induced writhing animal models, respectively. The most bioactive part, EA layer was further phytochemically investigated by multiple step chromatography techniques. The structures of these isolates were unambiguously elucidated by means of extensive spectroscopic and chemical methods, and comparison with corresponding data of the reported literature. Four major sesquiterpenoids (4, 6, 14, and 15) were achieved for their anti-inflammatory and antinociceptive assays by the two aforementioned animal models in vivo. All the isolated compounds were evaluated for their anti-inflammatory effects via detecting inflammatory mediator releases (COX-2, IL-1β, and TNF-α) in RAW 264.7 macrophage cells induced by LPS. RESULTS The ME and EA layers significantly alleviated the paw edema caused by carrageenan and decreased the number of writhes induced by acetic acid at the dose of 200 and/or 100 mg/kg in comparison to the control group (p < 0.01/0.05), and the EA layer exhibited better activity than that of ME layer. Subsequent phytochemical investigation on EA layer of C. kwangsiensis exhibited that three new terpenoid compounds (1-3), identified as (12Z,14R)-7β-hydroxylabda-8(17),12-diene-14,15,16-triol (1), (12Z,14S)- 7β-hydroxlabda-8(17),12-diene-14,15,16-triol (2), and (4S)-hydroxy-(8)-methoxy-(5S)-(H)-guaia1(10),7(11)-dien-12,8-olide (3), together with twenty-two known analogs were isolated. Furthermore, four major sesquiterpenoids (4, 6, 14, and 15) significantly relieved the paw edema and number of writhes at 100 and/or 50 mg/kg (p < 0.05/0.01). Likewise, the majority of sesqui- and diterpenoids isolated could remarkably inhibited the secretion of inflammatory mediators (COX-2, IL-1β, and TNF-α) in LPS-stimulated RAW 264.7 macrophages cells at the concentration of 20 μg/mL, comparable to DXM used as the positive control. All the results suggested that EA layer from C. kwangsiensis possessed the anti-inflammatory and antinociceptive activities, and these sesqui- and diterpenoids could be the effective constituents responsible for relieving inflammation. CONCLUSION The present studies undoubtedly determined the anti-inflammatory and antinociceptive material basis of C. kwangsiensis, including the EA layer and its precise components, which presented equivalent or better anti-inflammatory effects than that of positive control (ASP/DXM) in vivo and in vitro. These results not only would account for scientific knowledge for traditional use of C. kwangsiensis, but also provide credible theoretical foundation for the further development of anti-inflammatory and antinociceptive agents.
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Affiliation(s)
- Hai-Lian Yuan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China; State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Yun-Li Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China; State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Cai-Feng Ding
- State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Pei-Feng Zhu
- State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Qiong Jin
- State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Ya-Ping Liu
- State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China.
| | - Zhong-Tao Ding
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China.
| | - Xiao-Dong Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China; State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China.
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32
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Luo SL, Hu LJ, Huang XJ, Su JC, Shao XH, Wang L, Xu HH, Li CC, Wang Y, Ye WC. Discovery and Biomimetic Synthesis of a Phloroglucinol-Terpene Adduct Collection from Baeckea frutescens and Its Biogenetic Origin Insight. Chemistry 2020; 26:11104-11108. [PMID: 32315480 DOI: 10.1002/chem.202001111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Indexed: 01/20/2023]
Abstract
A phloroglucinol-terpene adduct (PTA) collection consisting of twenty-four molecules featuring three skeletons was discovered from Baeckea frutescens. Inspired by its biosynthetic hypothesis, we synthesized this PTA collection by reductive activation of stable phloroglucinol precursors into highly reactive ortho-quinone methide (o-QM) intermediates and subsequently Diels-Alder cycloaddition. We also demonstrated, for the first time, the generation process of the active o-QM by performing dynamic NMR and HPLC-MS monitoring experiments. Moreover, the PTA collection showed significant antifeedant effect toward the Plutella xylostella larvae.
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Affiliation(s)
- Shi-Lin Luo
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Jun-Cheng Su
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Xue-Hua Shao
- Institute of Fruit Tree Research, Guangdong Academy of, Agricultural Sciences, Guangzhou, 510640, P. R. China
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Han-Hong Xu
- State Key Laboratory for Conservation and Utilization of, Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Chuang-Chuang Li
- Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, P. R. China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
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33
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Stakanovs G, Mishnev A, Rasina D, Jirgensons A. A Concise Bioinspired Semisynthesis of Rumphellaones A-C and Their C-8 Epimers from β-Caryophyllene. JOURNAL OF NATURAL PRODUCTS 2020; 83:2004-2009. [PMID: 32538090 DOI: 10.1021/acs.jnatprod.0c00403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The first semisynthetic route toward rumphellaones B (2) and C (3) and their C-8 epimers as well as the shortest synthesis of rumphellaone A (1) and its C-8 epimer from the most accessible sesquiterpene, β-caryophyllene (4), is presented. Synthetic routes involved caryophyllonic acid as a key intermediate, which was converted to rumphellaone A (and epimer) via acid-catalyzed lactonization and rumphellaone C (and epimer) using one-pot epoxidation-lactonization. Rumphellaone B (2) and its epimer were obtained from rumphellaone A (1) and its epimer, respectively, using Saegusa-Ito oxidation. The absolute configuration at C-8 was confirmed by single-crystal X-ray analysis of rumphellaone B (2) and an acylated derivative of rumphellaone C.
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Affiliation(s)
- Georgijs Stakanovs
- Latvian Institute of Organic Synthesis, Aizkraukles Street 21, LV-1006, Riga, Latvia
| | - Anatoly Mishnev
- Latvian Institute of Organic Synthesis, Aizkraukles Street 21, LV-1006, Riga, Latvia
| | - Dace Rasina
- Latvian Institute of Organic Synthesis, Aizkraukles Street 21, LV-1006, Riga, Latvia
| | - Aigars Jirgensons
- Latvian Institute of Organic Synthesis, Aizkraukles Street 21, LV-1006, Riga, Latvia
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34
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Artemilavanolides A and B, two sesquiterpenoids with a 6-oxabicyclo[3.2.1]octane scaffold from Artemisia lavandulaefolia. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151872] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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Deng X, Wang XR, Wu L. Triketone-terpene meroterpenoids from the leaves of Rhodomyrtus tomentosa. Fitoterapia 2020; 143:104585. [PMID: 32247054 DOI: 10.1016/j.fitote.2020.104585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 11/16/2022]
Abstract
Eight new meroterpenoids (1-8) featuring β-triketone-conjugated terpenoids, rtomentones A-H, were isolated from the leaves of Rhodomyrtus tomentosa. Structures of the isolates were unambiguously established by a combination of NMR and ECD spectroscopy and X-ray diffraction analysis. Rtomentone C (3) was the first example of aromadendrane-based meroterpenoid containing an oxa-spiro[5.6] ring. Rtomentone D (4) was obtained as a racemic mixture confirmed by chiral HPLC analysis. The cytotoxicity against MDA-MB-231, A549, and DLD-1 cells of all isolates was evaluated.
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Affiliation(s)
- Xin Deng
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Xiu-Rong Wang
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Lin Wu
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China.
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36
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Lu SY, Shi QQ, Peng XR, Zhou L, Li XN, Qiu MH. Isolation of benzolactones, Ganodumones A-F from Ganoderma lucidum and their antibacterial activities. Bioorg Chem 2020; 98:103723. [PMID: 32171984 DOI: 10.1016/j.bioorg.2020.103723] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/01/2020] [Accepted: 03/02/2020] [Indexed: 01/19/2023]
Abstract
Six previously undescribed benzolactone constituents, ganodumones A-F (1-6), a new type of Ganoderma meroterpenoids (GMs) fused with 1,2,3,4,5-pentasubstituted phenyl and 1',2'-dioxy-3'-methyl-pentyl chain were isolated from the fruiting bodies of Ganoderma lucidum. Their structures were determined by spectroscopic analysis, X-ray crystal diffraction, and ECD computational methods. Meanwhile, bioactive evaluation showed that compounds 3 and 5 have antibacterial activities against Microsporum gypseum with MIC90 56.86 ± 3.98 and 18.48 ± 0.47 μg/mL, respectively.
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Affiliation(s)
- Shuang-Yang Lu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Qiang-Qiang Shi
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Xing-Rong Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Lin Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Ming-Hua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry Chinese Academy of Sciences, Kunming 650201, People's Republic of China.
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37
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Rhodomyrtus tomentosa (Aiton.): A review of phytochemistry, pharmacology and industrial applications research progress. Food Chem 2020; 309:125715. [DOI: 10.1016/j.foodchem.2019.125715] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/05/2019] [Accepted: 10/14/2019] [Indexed: 12/16/2022]
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38
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Gu JH, Wang WJ, Chen JZ, Liu JS, Li NP, Cheng MJ, Hu LJ, Li CC, Ye WC, Wang L. Leptosperols A and B, Two Cinnamoylphloroglucinol-Sesquiterpenoid Hybrids from Leptospermum scoparium: Structural Elucidation and Biomimetic Synthesis. Org Lett 2020; 22:1796-1800. [PMID: 32091219 DOI: 10.1021/acs.orglett.0c00109] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Leptosperols A and B (1 and 2), two cinnamoylphloroglucinol-sesquiterpenoid hybrids featuring unprecedented 1-benzyl-2-(2-phenylethyl) cyclodecane and 2-benzyl-3-phenylethyl decahydronaphthalene backbones, along with their biosynthetic precursor (3), were isolated from Leptospermum scoparium. Compounds 1 and 2 represent the first example of phloroglucinol derivatives biogenetically constructed by a De Mayo reaction. The biomimetic synthesis of leptosperol B (2) was achieved using the proposed biosynthetic pathway. In addition, compounds 1 and 2 showed significant anti-inflammatory effects in zebrafish acute inflammatory models.
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Affiliation(s)
- Ji-Hong Gu
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Wen-Jing Wang
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Jun-Zi Chen
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Jun-Shan Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Ni-Ping Li
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Min-Jing Cheng
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China.,Department of Chemistry, Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Chuang-Chuang Li
- Department of Chemistry, Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
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39
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Wei X, Yang J, Dai Z, Yu HF, Ding CF, Khan A, Zhao YL, Liu YP, Luo XD. Antitumor pyridine alkaloids hybrid with diverse units from Alangium chinense. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151502] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Chen S, Liu Z, Tan H, Chen Y, Li S, Li H, Zhu S, Liu H, Zhang W. Phomeroids A and B: two novel cytotoxic meroterpenoids from the deep-sea-derived fungus Phomopsis tersa FS441. Org Chem Front 2020. [DOI: 10.1039/c9qo01365b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phomeroids A (1) and B (2), two novel meroterpenoids representing two types of skeletons, together with one known homologous analogue (3) were isolated from the deep-sea-derived fungus Phomopsis tersa FS441.
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Affiliation(s)
- Shanchong Chen
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Zhaoming Liu
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Haibo Tan
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- Guangdong Provincial Key Laboratory of Applied Botany
- South China Botanical Garden
- Chinese Academy of Sciences
| | - Yuchan Chen
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Saini Li
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Haohua Li
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Shuang Zhu
- School of Biosciences and Biopharmaceutics
- Guangdong Pharmaceutical University
- Guangzhou 510006
- China
| | - Hongxin Liu
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
| | - Weimin Zhang
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangdong Academy of Sciences
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41
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Song JG, Su JC, Song QY, Huang RL, Tang W, Hu LJ, Huang XJ, Jiang RW, Li YL, Ye WC, Wang Y. Cleistocaltones A and B, Antiviral Phloroglucinol-Terpenoid Adducts from Cleistocalyx operculatus. Org Lett 2019; 21:9579-9583. [PMID: 31755722 DOI: 10.1021/acs.orglett.9b03743] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two novel phloroglucinol-terpenoid adducts (1 and 2), featuring a rare 2,2,4-trimethyl-cinnamyl-β-triketone unit, were isolated from the buds of Cleistocalyx operculatus. Their structures with absolute configurations were established by spectroscopic analyses, single-crystal X-ray diffraction, and quantum chemical calculations. Structurally, compound 1 represents a new carbon skeleton possessing a densely functionalized tricyclo[11.3.1.03;8]heptadecane bridged ring system with an unusual bridgehead enol. Compounds 1 and 2 exhibited significant in vitro antiviral activities against respiratory syncytial virus (RSV).
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Affiliation(s)
- Jian-Guo Song
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Jun-Cheng Su
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Qiao-Yun Song
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Rui-Li Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wei Tang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ren-Wang Jiang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
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42
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Abstract
The first enantioselective total syntheses of highly complex hexacyclic meroterpenoids STR-2 and -9 (strongylophorine (STR)) are reported. Key elements of the synthetic route include the use of Robinson-type annulation reaction to construct the tricyclic terpenoid building block and a highly efficient PIDA-mediated 1,3-diaxial sp3 C-H activation to incorporate the requisite δ-lactone moiety. This route also enables the determination of absolute configuration of the synthesized natural products.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry , Indian Institute of Technology , Kanpur , Uttar Pradesh 208016 , India
| | - Susanta Kumar Sau
- Department of Chemistry , Indian Institute of Technology , Kanpur , Uttar Pradesh 208016 , India
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