1
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Wen J, Ding Z, Li P. Broad-Scope (3 + 2) Cycloaddition of Cyclopropanes and Alkynes Enabled by Boronyl Radical Catalysis. Org Lett 2024; 26:7021-7025. [PMID: 39141499 DOI: 10.1021/acs.orglett.4c02565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
Cyclopentene skeletons are ubiquitous in natural products and small molecule drugs. The (3 + 2) cycloaddition of cyclopropanes and alkynes represents an efficient and atom-economic strategy for synthesizing these structures. However, the types of substituents on cyclopropane and alkyne used in previous works show evident limitations, restricting the application of this type of reaction to some extent. Herein, we report a broad-scope (3 + 2) cycloaddition of cyclopropanes and alkynes catalyzed by boronyl radicals. In this method, various substrates, such as mono-, di-, tri-, and tetrasubstituted cyclopropanes, as well as mono- and disubstituted alkynes, were compatible with up to 98% isolated yield.
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Affiliation(s)
- Jingru Wen
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zhengwei Ding
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
- School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, China
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2
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Ye X, Wang L, Yang X, Yang J, Zhou J, Lan C, Kantawong F, Kumsaiyai W, Wu J, Zeng J. Integrated Chemical Characterization, Network Pharmacology and Transcriptomics to Explore the Mechanism of Sesquiterpenoids Isolated from Gynura divaricata (L.) DC. against Chronic Myelogenous Leukemia. Pharmaceuticals (Basel) 2022; 15:1435. [PMID: 36422564 PMCID: PMC9693606 DOI: 10.3390/ph15111435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/28/2022] [Accepted: 11/14/2022] [Indexed: 08/30/2023] Open
Abstract
Chronic myelogenous leukemia (CML) is a serious threat to human health, while drugs for CML are limited. Herbal medicines with structural diversity, low toxicity and low drug resistance are always the most important source for drug discoveries. Gynura divaricata (L.) DC. is a well-known herbal medicine whose non-alkaline ingredients (GD-NAIs) were isolated. The GD-NAIs demonstrated potential anti-CML activity in our preliminary screening tests. However, the chemical components and underlying mechanism are still unknown. In this study, GD-NAIs were tentatively characterized using UHPLC-HRMS combined with molecular networking, which were composed of 75 sesquiterpenoids. Then, the anti-CML activities of GD-NAIs were evaluated and demonstrated significant suppression of proliferation and promotion of apoptosis in K562 cells. Furthermore, the mechanism of GD-NAIs against CML were elucidated using network pharmacology combined with RNA sequencing. Four sesquiterpenoids would be the main active ingredients of GD-NAIs against CML, which could regulate PD-L1 expression and the PD-1 checkpoint pathway in cancer, PI3K/AKT, JAK/STAT, TGF-β, estrogen, Notch and Wnt signaling pathways. In conclusion, our study reveals the composition of GD-NAIs, confirms its anti-CML activity and elucidates their underlying mechanism, which is a potential countermeasure for the treatment of CML.
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Affiliation(s)
- Xinyuan Ye
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Long Wang
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Xin Yang
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Jie Yang
- School of Basic Medical Science, Southwest Medical University, Luzhou 646000, China
- Faculty Associated Medical Sciences, Department of Medical Technology, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jie Zhou
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Cai Lan
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Fahsai Kantawong
- Faculty Associated Medical Sciences, Department of Medical Technology, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Warunee Kumsaiyai
- Faculty Associated Medical Sciences, Department of Medical Technology, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jianming Wu
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
- School of Basic Medical Science, Southwest Medical University, Luzhou 646000, China
- Education Ministry Key Laboratory of Medical Electrophysiology, Southwest Medical University, Luzhou 646000, China
- Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Southwest Medical University, Luzhou 646000, China
- Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Southwest Medical University, Luzhou 646000, China
| | - Jing Zeng
- School of Pharmacy, Southwest Medical University, Luzhou 646000, China
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3
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Chen Z, Kong X, Niu S, Yang S, Liu J, Chen B, Luo B, Zhou C, Ding C, Fang X. N-Heterocyclic Carbene-Catalyzed Asymmetric Synthesis of Cyclopentenones. Org Lett 2021; 23:3403-3408. [PMID: 33844550 DOI: 10.1021/acs.orglett.1c00870] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-Heterocyclic carbene-catalyzed asymmetric construction of cyclopentenones using enals and α-diketones is achieved, furnishing a series of highly functionalized cyclopentenones in a highly diastereo- and enantioselective manner. The protocol tolerates substrates with both aromatic and aliphatic groups, and further transformations of the products delivered a range of value-added molecules.
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Affiliation(s)
- Zhizhou Chen
- College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Xiangwen Kong
- State Key Laboratory of Structural Chemistry and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shengtong Niu
- State Key Laboratory of Structural Chemistry and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Jinggong Liu
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China
| | - Bolai Chen
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China
| | - Benlong Luo
- Pingxiang University, Pingxiang 337055, China
| | - Changyu Zhou
- College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Chenglin Ding
- College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Xinqiang Fang
- College of Chemistry, Fuzhou University, Fuzhou 350116, China.,State Key Laboratory of Structural Chemistry and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
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4
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Roldão MV, Souza-Filho LG, Almeida WP, Coelho F. A Straightforward Approach to the Synthesis of Disubstituted Cyclopentenones. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mariane V. Roldão
- Institute of Chemistry; University of Campinas; PO Box6154 13093-970 Campinas São Paulo Brazil
| | | | - Wanda P. Almeida
- Institute of Chemistry; University of Campinas; PO Box6154 13093-970 Campinas São Paulo Brazil
- Faculty of Pharmaceutical Sciences; University of Campinas; Rua Cândido Portinari, 200 13093-971 Campinas São Paulo Brazil
| | - Fernando Coelho
- Institute of Chemistry; University of Campinas; PO Box6154 13093-970 Campinas São Paulo Brazil
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5
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Hu X, Musacchio AJ, Shen X, Tao Y, Maimone TJ. Allylative Approaches to the Synthesis of Complex Guaianolide Sesquiterpenes from Apiaceae and Asteraceae. J Am Chem Soc 2019; 141:14904-14915. [PMID: 31448610 DOI: 10.1021/jacs.9b08001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
With hundreds of unique members isolated to date, guaianolide lactones represent a particularly prolific class of terpene natural products. Given their extensive documented therapeutic properties and fascinating chemical structures, these metabolites have captivated the synthetic chemistry community for many decades. As a result of divergent biosynthetic pathways, which produce a wide array of stereochemical and oxidative permutations, a unifying synthetic pathway to this broad family of natural products is challenging. Herein we document the evolution of a chiral-pool-based synthetic program aimed at accessing an assortment of guaianolides, particularly those from the plant family Apiaceae as well as Asteraceae, members of which possess distinct chemical substructures and necessitate deviating synthetic platforms. An initial route employing the linear monoterpene linalool generated a lower oxidation state guaianolide but was not compatible with the majority of family members. A double-allylation disconnection using a carvone-derived fragment was then developed to access first an Asteraceae-type guaianolide and then various Apiaceae congeners. Finally, using these findings in conjunction with a tandem polyoxygenation cascade, we developed a pathway to highly oxygenated nortrilobolide. A variety of interesting observations in metal-mediated aldehyde allylation and alkene polyoxygenation are reported and discussed.
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Affiliation(s)
| | | | | | | | - Thomas J Maimone
- Department of Chemistry , University of California, Berkeley , 826 Latimer Hall , Berkeley , California 94720 , United States
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6
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Han P, Zhou Z, Si CM, Sha XY, Gu ZY, Wei BG, Lin GQ. Asymmetric Synthesis of Rupestonic Acid and Pechueloic Acid. Org Lett 2017; 19:6732-6735. [PMID: 29211481 DOI: 10.1021/acs.orglett.7b03459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this report, the originally proposed rupestonic acid (5) and pechueloic acid (3) were efficiently synthesized. The chiral lactone 13, recycled from the degradation of saponin glycosides, was utilized to prepare the key chiral fragment 11. During the exploration of this convergent assembly strategy, the ring-closing metathesis (RCM), SmI2-prompted intermolecular addition, and [2,3]-Wittig rearrangement proved to be effective transformations for the synthesis of subunits.
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Affiliation(s)
- Pan Han
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
| | - Zhu Zhou
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
| | - Chang-Mei Si
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
| | - Xian-Yi Sha
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
| | - Zheng-Yi Gu
- Xinjiang Institute of Materia Medica , Lane 140, South Xinhua Road, Urumqi, Xinjiang 830004, China
| | - Bang-Guo Wei
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
| | - Guo-Qiang Lin
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University , 220 Handan Road, Shanghai 200433, China
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7
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Structure-activity relationship studies of 1-(1'-hydroxyalkyl)rupestonic acid methyl esters against influenza viruses. Bioorg Med Chem Lett 2017; 27:1484-1487. [PMID: 28196702 DOI: 10.1016/j.bmcl.2016.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 06/02/2016] [Accepted: 06/06/2016] [Indexed: 11/22/2022]
Abstract
A series of 1-(1'-hydroxyalkyl)rupestonic acid methyl esters were synthesized via the condensation of methyl rupestonate with various aldehydes in the presence of LDA. This mixed aldol reaction was highly stereoselective and all the new compounds were elucidated by detailed NMR and MS analyses. The absolute configurations of the newly formed stereocenters were further confirmed by X-ray crystallographic analysis of 3d, the results of which were found to be opposite to the prediction based on Zimmerman-Traxler's and Houk's models. All the compounds synthesized were then evaluated for their in vitro inhibitory activities against influenza A (H1N1 and H3N2) and B viruses. The data showed that 3p displayed the highest activity against influenza A H1N1 (IC50=0.69μg/mL) and H3N2 (IC50=0.69μg/mL) viruses, which were even better than Ribavirin and Oseltmivir. On the other hand, both 3c and 3o were found to show comparable activities with the reference drugs in inhibiting both influenza A and B viruses. Further studies will focus on reducing the cytotoxicity of the hits reported in this work.
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8
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Hu X, Xu S, Maimone TJ. A Double Allylation Strategy for Gram-Scale Guaianolide Production: Total Synthesis of (+)-Mikanokryptin. Angew Chem Int Ed Engl 2017; 56:1624-1628. [PMID: 28052523 DOI: 10.1002/anie.201611078] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Indexed: 12/25/2022]
Abstract
With over 5000 members isolated to date, sesquiterpene lactones represent a prolific source of medicinal agents with several derivatives in human clinical trials. The guaianolides, a major subset of this group, have been intensely investigated from both medicinal and chemical-synthesis perspectives for decades. To date, the myriad stereochemical permutations presented by this enormous family have precluded the synthesis of many unique members. Herein we report the total synthesis of the trans-fused 8,12-guaianolide (+)-mikanokryptin in 10 steps from (+)-carvone. Notably, this synthesis is the first gram-scale total synthesis of a guaianolide natural product.
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Affiliation(s)
- Xirui Hu
- Department of Chemistry, University of California, Berkeley, 826 Latimer Hall, Berkeley, CA, 94720, USA
| | - Silong Xu
- Department of Chemistry, University of California, Berkeley, 826 Latimer Hall, Berkeley, CA, 94720, USA.,Current address: Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Thomas J Maimone
- Department of Chemistry, University of California, Berkeley, 826 Latimer Hall, Berkeley, CA, 94720, USA
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9
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Hu X, Xu S, Maimone TJ. A Double Allylation Strategy for Gram-Scale Guaianolide Production: Total Synthesis of (+)-Mikanokryptin. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xirui Hu
- Department of Chemistry; University of California, Berkeley; 826 Latimer Hall Berkeley CA 94720 USA
| | - Silong Xu
- Department of Chemistry; University of California, Berkeley; 826 Latimer Hall Berkeley CA 94720 USA
- Current address: Department of Chemistry, School of Science; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Thomas J. Maimone
- Department of Chemistry; University of California, Berkeley; 826 Latimer Hall Berkeley CA 94720 USA
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10
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Simeonov SP, Nunes JPM, Guerra K, Kurteva VB, Afonso CAM. Synthesis of Chiral Cyclopentenones. Chem Rev 2016; 116:5744-893. [DOI: 10.1021/cr500504w] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Svilen P. Simeonov
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - João P. M. Nunes
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Krassimira Guerra
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Vanya B. Kurteva
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - Carlos A. M. Afonso
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
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11
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Deprés JP, Delair P, Poisson JF, Kanazawa A, Greene AE. Diverse Natural Products from Dichlorocyclobutanones: An Evolutionary Tale. Acc Chem Res 2016; 49:252-61. [PMID: 26807483 DOI: 10.1021/acs.accounts.5b00493] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
11-Nor PGE2 was prepared in our laboratory several years ago and used to obtain the corresponding ring-expanded γ-butyrolactam, γ-butyrolactone, and cyclopentanone derivatives. The conversion of a cyclobutanone into a cyclopentanone had relatively little precedent and merited further study. It was soon found that the presence of a single chlorine adjacent to the carbonyl not only greatly accelerated the reaction with ethereal diazomethane, but also substantially enhanced its regioselectivity; not surprisingly, a second chlorine further increased both. The confluence of this finding and the discovery by Krepski and Hassner that the presence of phosphorus oxychloride significantly improved the Zn-mediated dehalogenation procedure for the preparation of α,α-dichlorocyclobutanones from olefins provided the starting point for decades' worth of exciting adventures in natural product synthesis. A wide variety of naturally occurring 5-membered carbocycles (e.g., hirsutanes, cuparenones, bakkanes, guaianolides, azulenes) could thus be prepared by using dichloroketene-olefin cycloaddition, followed by regioselective one-carbon ring expansion with diazomethane. Importantly, it was also found that natural γ-butyrolactones (e.g., β-oxygenated γ-butyrolactones, lactone fatty acids) could be secured through regioselective Baeyer-Villiger oxidation of cycloadducts with m-CPBA and that naturally occurring γ-butyrolactam derivatives (e.g., amino acids, pyrrolidines, pyrrolizidines, indolizidines) could be efficiently obtained by regioselective Beckmann ring expansion of the adducts with O-(mesitylenesulfonyl)hydroxylamine (Tamura's reagent). These 5-membered carbocycles, γ-butyrolactones, and γ-butyrolactam derivatives were generally secured in enantiopure form through the use of either intrinsically chiral olefins or olefins bearing Stericol, a highly effective chiral auxiliary developed specifically for this "three-atom olefin annelation" approach. In addition, considerable useful chemistry has been developed in the context of this synthesis program. This includes new methods for olefin vicinal dicarboxylation, β-methylene-γ-butyrolactonization, γ-butyrolactone and δ-valerolactone α-methylenations, transesterification, angelic ester synthesis, chiral enol and ynol ether preparations, dichloroacetylene synthesis, and trans, trans hydroxy triad introduction. This versatile dichlorocyclobutanone-centered approach to natural product synthesis, together with the attendant new methods that have been developed, forms the basis of this Account, which is presented as an evolutionary tale. It is hoped that the Account will stimulate other research groups to seek to exploit the rich chemistry of dichlorocyclobutanones for possible solutions to problems in organic synthesis.
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Affiliation(s)
- Jean-Pierre Deprés
- SERCO, Département
de Chimie Moléculaire,
Univ. Grenoble Alpes, ICMG FR-2607, UMR-5250, 38041 Cedex 9 Grenoble, France
| | - Philippe Delair
- SERCO, Département
de Chimie Moléculaire,
Univ. Grenoble Alpes, ICMG FR-2607, UMR-5250, 38041 Cedex 9 Grenoble, France
| | - Jean-François Poisson
- SERCO, Département
de Chimie Moléculaire,
Univ. Grenoble Alpes, ICMG FR-2607, UMR-5250, 38041 Cedex 9 Grenoble, France
| | - Alice Kanazawa
- SERCO, Département
de Chimie Moléculaire,
Univ. Grenoble Alpes, ICMG FR-2607, UMR-5250, 38041 Cedex 9 Grenoble, France
| | - Andrew E. Greene
- SERCO, Département
de Chimie Moléculaire,
Univ. Grenoble Alpes, ICMG FR-2607, UMR-5250, 38041 Cedex 9 Grenoble, France
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12
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Zhang C, Wang S, Zeng KW, Li J, Ferreira D, Zjawiony JK, Liu BY, Guo XY, Jin HW, Jiang Y, Tu PF. Nitric Oxide Inhibitory Dimeric Sesquiterpenoids from Artemisia rupestris. JOURNAL OF NATURAL PRODUCTS 2016; 79:213-223. [PMID: 26696523 DOI: 10.1021/acs.jnatprod.5b00894] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Twelve new dimeric sesquiterpenoids (1-12) were isolated from the dried whole plants of Artemisia rupestris. Their structures were determined using MS and NMR data, and the absolute configurations were elucidated on the basis of experimental and calculated ECD spectra. Compounds 1-9 are presumably formed via biocatalyzed [2+2] or [4+2] cycloaddition reactions. Stereoselectivity of the [4+2] Diels-Alder reaction dictated the formation of endo-products. The dimeric sesquiterpenoids exhibited moderate inhibition on NO production stimulated by lipopolysaccharide in BV-2 microglial cells, with IC50 values in the range 17.0-71.8 μM.
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Affiliation(s)
- Chen Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Shu Wang
- Department of Medicinal Chemistry and Pharmaceutical Analysis, Logistics College of Chinese People's Armed Police Forces , Tianjin 300162, People's Republic of China
| | - Ke-Wu Zeng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Jun Li
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi , University, Mississippi 38677-1848, United States
| | - Jordan K Zjawiony
- Department of BioMolecular Sciences, Division of Pharmacognosy, and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi , University, Mississippi 38677-1848, United States
| | - Bing-Yu Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Xiao-Yu Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Hong-Wei Jin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Yong Jiang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
| | - Peng-Fei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191, People's Republic of China
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13
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Rupestonic acids B–G, NO inhibitory sesquiterpenoids from Artemisia rupestris. Bioorg Med Chem Lett 2014; 24:4318-22. [DOI: 10.1016/j.bmcl.2014.07.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/01/2014] [Accepted: 07/02/2014] [Indexed: 10/25/2022]
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14
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Raji Reddy C, Kumaraswamy P, Singarapu KK. Sequential Allylic Substitution/Pauson–Khand Reaction: A Strategy to Bicyclic Fused Cyclopentenones from MBH-Acetates of Acetylenic Aldehydes. J Org Chem 2014; 79:7880-8. [PMID: 25105763 DOI: 10.1021/jo500962d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Chada Raji Reddy
- Division of Natural Products Chemistry, ‡Centre for NMR & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Paridala Kumaraswamy
- Division of Natural Products Chemistry, ‡Centre for NMR & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Kiran K. Singarapu
- Division of Natural Products Chemistry, ‡Centre for NMR & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
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15
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