51
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Qin DP, Pan DB, Xiao W, Li HB, Yang B, Yao XJ, Dai Y, Yu Y, Yao XS. Dimeric Cadinane Sesquiterpenoid Derivatives from Artemisia annua. Org Lett 2018; 20:453-456. [PMID: 29300490 DOI: 10.1021/acs.orglett.7b03796] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Arteannoide A (1), an unusual cadinane dimer featuring a rare fused 6,8-dioxabicyclo[3.2.l]octan-7-one ring system, arteannoides B and C (2 and 3), two novel heterodimers incorporating a rearranged cadinene sesquiterpenoid and a phenylpropanoid, together with two new rearranged cadinene sesquiterpenoids 4 and 5, were isolated from Artemisia annua L. Their structures were determined by a combination of NMR spectroscopy, electronic circular dichroism calculations, and X-ray diffraction analyses. Compounds 2 and 3 showed inhibition of nitric oxide production in lipopolysaccharide-induced RAW 264.7 mouse macrophage cell lines with IC50 values of 4.5 and 2.9 μM, respectively.
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Affiliation(s)
| | | | - Wei Xiao
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang 222001, People's Republic of China
| | - Hai-Bo Li
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang 222001, People's Republic of China
| | - Biao Yang
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang 222001, People's Republic of China
| | - Xiao-Jun Yao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology , AvenidaWailong, Taipa, Macau
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Abstract
Hyperjapones F–I are tetracyclic meroterpenoids recently isolated from Hypericum japonicum. All four of these natural products have been synthesised using oxidative, intermolecular hetero-Diels–Alder reactions to couple their common biosynthetic precursor, norflavesone, to the appropriate monoterpene building blocks: sabinene, β-pinene, and α-pinene. The synthesis of enantiomerically pure hyperjapones H and I and comparison of their optical rotations to those of the natural samples indicated that these meroterpenoids are probably biosynthesised as either racemic or scalemic mixtures.
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53
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Guo Y, Zhang N, Sun W, Duan X, Zhang Q, Zhou Q, Chen C, Zhu H, Luo Z, Liu J, Li XN, Xue Y, Zhang Y. Bioactive polycyclic polyprenylated acylphloroglucinols from Hypericum perforatum. Org Biomol Chem 2018; 16:8130-8143. [DOI: 10.1039/c8ob02067a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Fifteen new polycyclic polyprenylated acylphloroglucinols with dual-targeted inhibitory activities for Alzheimer's disease, were isolated from Hypericum perforatum.
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54
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Hu L, Liu Y, Wang Y, Wang Z, Huang J, Xue Y, Liu J, Liu Z, Chen Y, Zhang Y. Discovery of acylphloroglucinol-based meroterpenoid enantiomers as KSHV inhibitors from Hypericum japonicum. RSC Adv 2018; 8:24101-24109. [PMID: 35539193 PMCID: PMC9081833 DOI: 10.1039/c8ra04073g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 06/26/2018] [Indexed: 11/28/2022] Open
Abstract
Kaposi's sarcoma associated herpesvirus (KSHV) has gained considerable attention as a type of carcinogenic pathogen. Recent research suggests that KSHV has participated in the pathogenesis of Kaposi's sarcoma-related malignant neoplastic diseases. Viral lytic infection might be pivotal for the etiopathogenesis of KSHV-induced diseases; however, most clinical KSHV lytic replication inhibitors like ganciclovir, nelfinavir, or cidofovir do not restrain virus replication effectively enough to achieve clinical efficacy. In our continued pharmaceutical studies on Chinese herbal medicines, new acylphloroglucinol-based meroterpenoid enantiomers have been discovered from Hypericum japonicum. Most of these metabolites have potential inhibitory activities that target KSHV lytic replication. Amongst these analogues, compounds 1a and 1b possess an unreported ring system cyclopenta[b]chromene. Compounds 1a with 4a exhibit stronger inhibitory activities towards the lytic replication of KSHV in Vero cells. In addition, 1a and 4a have IC50 values of 8.30 and 4.90 μM and selectivity indexes of 23.49 and 25.70, respectively. Qualitative and quantitative SAR and molecular docking studies for acylphloroglucinol-based meroterpenoids with regard to anti-KSHV activity were conducted. An explanation for the variation in the activity and selectivity indexes was proposed in accordance with the predicted binding pose found with molecular docking to a putative target, thymidylate synthase (kTS). Compounds 1a and 4a have potential for further development and optimization of their anti-KSHV activities which could lead to new candidate drugs. New enantiomers (1a/1b–4a/4b) were discovered from Hypericum japonicum. 1a/1b possessed a novel ring system cyclopenta[b]chromene. 1a and 4a exhibited promising anti-KSHV activities. QSAR studies for enantiomers on anti-KSHV activity were conducted.![]()
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Cao X, Yang X, Wang P, Liang Y, Liu F, Tuerhong M, Jin DQ, Xu J, Lee D, Ohizumi Y, Guo Y. Polycyclic phloroglucinols as PTP1B inhibitors from Hypericum longistylum : Structures, PTP1B inhibitory activities, and interactions with PTP1B. Bioorg Chem 2017; 75:139-148. [DOI: 10.1016/j.bioorg.2017.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/23/2017] [Accepted: 09/05/2017] [Indexed: 11/28/2022]
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Liu YF, Yu SS. Survey of natural products reported by Asian research groups in 2016. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2017; 19:1047-1072. [PMID: 29078723 DOI: 10.1080/10286020.2017.1391229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
The new natural products reported in peer-reviewed articles in 2016 in journals with good reputations were reviewed and analyzed. The advances that Asian research groups made in the field of natural products chemistry in 2016 were summarized. Compounds with unique structural features and/or promising bioactivities originating from Asian natural sources were discussed based on structural classification.
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Affiliation(s)
- Yan-Fei Liu
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Shi-Shan Yu
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
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57
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Hu J, Gao W, Xu F, Wei C, Shi M, Sun H, Zhen B, Wang J, Ji T, Jiang J. Polycyclic polyprenylated acylphloroglucinol derivatives from Hypericum scabrum. Bioorg Med Chem Lett 2017; 27:4932-4936. [DOI: 10.1016/j.bmcl.2017.09.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/27/2017] [Accepted: 09/01/2017] [Indexed: 11/25/2022]
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58
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Liu H, Huo L, Yang B, Yuan Y, Zhang W, Xu Z, Qiu S, Tan H. Biomimetic-Inspired Syntheses of Myrtucommuacetalone and Myrtucommulone J. Org Lett 2017; 19:4786-4789. [DOI: 10.1021/acs.orglett.7b02159] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- 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, Guangzhou 510070, P.R. 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, P.R. 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, P.R. China
| | - Bao Yang
- 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, P.R. 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, P.R. China
| | - 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, Guangzhou 510070, P.R. China
| | - Zhifang Xu
- 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, P.R. China
| | - Shengxiang Qiu
- 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, P.R. 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, P.R. China
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Psiguajadials A-K: Unusual Psidium Meroterpenoids as Phosphodiesterase-4 Inhibitors from the Leaves of Psidium guajava. Sci Rep 2017; 7:1047. [PMID: 28432317 PMCID: PMC5430738 DOI: 10.1038/s41598-017-01028-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/23/2017] [Indexed: 01/02/2023] Open
Abstract
Bioassay-guided fractionation of the ethanolic extract of the leaves of Psidium guajava led to the isolation of 11 new Psidium meroterpenoids, psiguajadials A–K (1–11), along with 17 known ones (12–28). Their structures and absolute configurations were elucidated by spectroscopic methods and comparison of experimental and calculated ECD. Compounds 1 and 2 represent two unprecedented skeletons of 3,5-diformyl-benzyl phloroglucinol-coupled sesquiterpenoid, while 3 is the first example of Psidium meroterpenoids coupling via an oxepane ring. Putative biosynthetic pathways towards 1 and 2 are proposed. Compounds 1–13 and 16–26 exhibited moderate inhibitory activities against phosphodiesterase-4 (PDE4), a drug target for asthma and chronic obstructive pulmonary disease, with IC50 values in the range of 1.34–7.26 μM.
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61
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Xu WJ, Luo J, Li RJ, Yang MH, Kong LY. Furanmonogones A and B: two rearranged acylphloroglucinols with a 4,5-seco-3(2H)-furanone core from the flowers of Hypericum monogynum. Org Chem Front 2017. [DOI: 10.1039/c6qo00620e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Rearranged acylphloroglucinols with an unprecedented 4,5-seco-3(2H)-furanone skeleton, furanmonogones A (1) and B (2), were isolated from the flowers of Hypericum monogynum.
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Affiliation(s)
- Wen-Jun Xu
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Jun Luo
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Rui-Jun Li
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
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62
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Lam HC, Spence JTJ, George JH. Biomimetic Total Synthesis of Hyperjapones A–E and Hyperjaponols A and C. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiu C. Lam
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
| | | | - Jonathan H. George
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
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63
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Lam HC, Spence JTJ, George JH. Biomimetic Total Synthesis of Hyperjapones A-E and Hyperjaponols A and C. Angew Chem Int Ed Engl 2016; 55:10368-71. [PMID: 27461748 DOI: 10.1002/anie.201606091] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Indexed: 11/08/2022]
Abstract
Hyperjapones A-E and hyperjaponols A-C are complex natural products of mixed aromatic polyketide and terpene biosynthetic origin that have recently been isolated from Hypericum japonicum. We have synthesized hyperjapones A-E using a biomimetic, oxidative hetero-Diels-Alder reaction to couple together dearomatized acylphloroglucinol and cyclic terpene natural products. Hyperjapone A is proposed to be the biosynthetic precursor of hyperjaponol C through a sequence of: 1) epoxidation; 2) acid-catalyzed epoxide ring-opening; and 3) a concerted, asynchronous alkene cyclization and 1,2-alkyl shift of a tertiary carbocation. Chemical mimicry of this proposed biosynthetic sequence allowed a concise total synthesis of hyperjaponol C to be completed in which six carbon-carbon bonds, six stereocenters, and three rings were constructed in just four steps.
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Affiliation(s)
- Hiu C Lam
- Department of Chemistry, University of Adelaide, Adelaide, SA, 5005, Australia
| | - Justin T J Spence
- Department of Chemistry, University of Adelaide, Adelaide, SA, 5005, Australia
| | - Jonathan H George
- Department of Chemistry, University of Adelaide, Adelaide, SA, 5005, Australia.
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Zhu H, Chen C, Tan D, Li D, Guo Y, Wei G, Zhang J, Wang J, Luo Z, Xue Y, Zhang Y. Sampbenzophenones A–G, prenylated benzoylphloroglucinol derivatives from Hypericum sampsonii. RSC Adv 2016. [DOI: 10.1039/c6ra17885e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Seven prenylated benzoylphloroglucinol derivatives, named sampbenzophenones A–G (1–7), together with two known analogues (8 and 9), were isolated from the aerial parts of Hypericum sampsonii.
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