1
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DiLiberti SL, Eastwood MS, Otte SC, Douglas CJ. Total Synthesis of (+)-Eburnamonine Using Asymmetric Alkene Cyanoamidation through C-CN Bond Activation. Org Lett 2024; 26:5630-5634. [PMID: 38950329 DOI: 10.1021/acs.orglett.4c01480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
We report the total synthesis of (+)-eburnamonine using enantioselective alkene cyanoamidation to form the all-carbon quaternary stereocenter. Palladium, phosphoramidite ligand, and a Lewis acid combine to form a co-catalyst that promotes C-CN activation of a cyanoformamide, followed by intramolecular alkene cyanoamidation. Overall, the synthesis of (+)-eburnamonine is accomplished in 8 steps from 4-methylene hexanoic acid and tryptamine, providing an example of asymmetric aliphatic-tethered alkene cyanoamidation and its use in total synthesis.
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Affiliation(s)
- Serena L DiLiberti
- Department of Chemistry, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Matthew S Eastwood
- Department of Chemistry, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Sadie C Otte
- Department of Chemistry, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Christopher J Douglas
- Department of Chemistry, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
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2
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Tan YS, Ng MP, Tan CH, Tang WK, Sim KS, Yong KT, Krishnan P, Lim KH, Lim SH, Low YY. Quinoline, Indole, and Isogranatanine Alkaloids from Malayan Leuconotis eugeniifolia. JOURNAL OF NATURAL PRODUCTS 2024; 87:286-296. [PMID: 38284153 DOI: 10.1021/acs.jnatprod.3c00960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Nine new alkaloids, eugeniinalines A-H (1-8) and (+)-eburnamenine N-oxide (9), comprising one quinoline, six indole, and two isogranatanine alkaloids, were isolated from the stem-bark extract of the Malayan Leuconotis eugeniifolia. The structures and absolute configurations of these alkaloids were established based on the analysis of the spectroscopic data, GIAO NMR calculations, DP4+ probability analysis, TDDFT-ECD method, and X-ray diffraction analysis. Eugeniinaline A (1) represents a new pentacyclic quinoline alkaloid with a 6/6/5/6/7 ring system. Eugeniinaline G (7) and its seco-derivative, eugeniinaline H (8), were the first isogranatanine alkaloids isolated as natural products. The known alkaloids leucolusine (10) and melokhanine A (11) were found to be the same compound, based on comparison of the spectroscopic data of both compounds, with the absolute configuration of (7R, 20R, 21S). Eugeniinalines A and G (1 and 7) showed cytotoxic activity against the HT-29 cancer cell line with IC50 values of 7.1 and 7.2 μM, respectively.
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Affiliation(s)
- Yi-Sheng Tan
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Min-Phin Ng
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Chun-Hoe Tan
- Department of Biotechnology, Faculty of Applied Science, Lincoln University College, 47301 Petaling Jaya, Selangor, Malaysia
| | - Wai-Kit Tang
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kae-Shin Sim
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kien-Thai Yong
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Premanand Krishnan
- Foundation in Science, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Siew-Huah Lim
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
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3
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Luo W, Zheng X, Zhang F, Luo Q, Deng WT, Long L, Yu D, Wang ZX, Chen Z. Synthesis of functionalized tetrahydrodibenzo[ b, g][1,8]naphthyridin-1(2 H)-ones through base-promoted annulation of quinoline-derived dipolarophiles and cyclic enaminones. Org Biomol Chem 2023. [PMID: 37997680 DOI: 10.1039/d3ob01547e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
An eco-friendly and metal-free method for the synthesis of tetrahydrodibenzo[b,g][1,8]naphthyridin-1(2H)-ones was established. Quinoline-derived dipolarophiles and cyclic enaminones as starting materials undergo a 1,4-Michael addition/SNAr tandem annulation reaction affording the target products. This approach features transition metal-free conditions, good functional group tolerance and operational simplicity.
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Affiliation(s)
- Wenjun Luo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Xinghua Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Fanglian Zhang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Qiuya Luo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Wen-Ting Deng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Lipeng Long
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Daohong Yu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Zhong-Xia Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
| | - Zhengwang Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P.R. China.
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4
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Cruz-Aguilar DA, Hernández-Rodríguez M. Stereoselective synthesis of highly substituted 1-isomorphans (1-azabicyclo[3.3.1]nonanes). Chem Commun (Camb) 2023. [PMID: 37379083 DOI: 10.1039/d3cc00621b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
We describe the first enantioselective synthesis of highly functionalized 1-azabicyclo[3.3.1]nonanes (1-IM). The 1-IM scaffold is present in natural products and drugs and is an isomer of the morphan moiety. The proposed methodology is based on an organocatalytic Michael addition of N-protected piperidine ketoesters to nitroalkenes and an intramolecular nitro-Mannich reaction as key transformations. The 1-IMs feature 6 contiguous stereocenters, substituents at positions 2 and 4, and nitro, ester, and hydroxyl functional groups at positions 3, 5, and 6 respectively. The synthesis is straightforward, highly stereoselective (up to 98% ee, >99 : 1 d.r.), with overall yields of up to 83% and requires only two purification steps.
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Affiliation(s)
- Diego A Cruz-Aguilar
- Instituto de Química, Universidad Nacional Autónoma de Mexico, Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, Cd. Mx. 04510, Mexico.
| | - Marcos Hernández-Rodríguez
- Instituto de Química, Universidad Nacional Autónoma de Mexico, Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, Cd. Mx. 04510, Mexico.
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5
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Ma C, Sun Y, Yang J, Guo H, Zhang J. Catalytic Asymmetric Synthesis of Tröger's Base Analogues with Nitrogen Stereocenter. ACS CENTRAL SCIENCE 2023; 9:64-71. [PMID: 36712492 PMCID: PMC9881208 DOI: 10.1021/acscentsci.2c01121] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Indexed: 06/18/2023]
Abstract
Nitrogen stereocenters are common chiral units in natural products, pharmaceuticals, and chiral catalysts. However, their research has lagged largely behind, compared with carbon stereocenters and other heteroatom stereocenters. Herein, we report an efficient method for the catalytic asymmetric synthesis of Tröger's base analogues with nitrogen stereocenters via palladium catalysis and home-developed GF-Phos. It allows rapid construction of a new rigid cleft-like structure with both a C- and a N-stereogenic center in high efficiency and selectivity. A variety of applications as a chiral organocatalyst and metallic catalyst precursors were demonstrated. Furthermore, DFT calculations suggest that the NH···O hydrogen bonding and weak interaction between the substrate and ligand are crucial for the excellent enantioselectivity control.
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Affiliation(s)
- Chun Ma
- Department
of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R. China
| | - Yue Sun
- Department
of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R. China
| | - Junfeng Yang
- Department
of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R. China
- Fudan
Zhangjiang Institute, Shanghai 201203, P. R. China
| | - Hao Guo
- Department
of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R. China
- Zhuhai
Fudan Innovation Institute, Zhuhai, 519000, P. R. China
| | - Junliang Zhang
- Department
of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R. China
- School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
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6
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Dolna M, Nowacki M, Danylyuk O, Brotons-Rufes A, Poater A, Michalak M. NHC-BIAN-Cu(I)-Catalyzed Friedländer-Type Annulation of 2-Amino-3-(per)fluoroacetylpyridines with Alkynes on Water. J Org Chem 2022; 87:6115-6136. [PMID: 35394784 PMCID: PMC9087358 DOI: 10.1021/acs.joc.2c00380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
![]()
The direct catalytic
alkynylation/dehydrative cyclization of 2-amino-3-trifluoroacetyl-pyridines
on water was developed for the efficient synthesis of a broad range
of fluorinated 1,8-naphthyridines from terminal alkynes. A novel N-heterocyclic
carbene (NHC) ligand system that combines a π-extended acenaphthylene
backbone with sterically bulky pentiptycene pendant groups was successfully
utilized in a copper- or silver-mediated cyclization. Computational
analysis of the reaction pathway supports our explanation of the different
experimental conversions and yields for the set of copper and silver
catalysts. The impact of steric hindrance at the metal center and
the flexibility of substituents on the imidazole ring of the NHC on
catalytic performance are also discussed.
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Affiliation(s)
- Magdalena Dolna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Michał Nowacki
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Oksana Danylyuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Artur Brotons-Rufes
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/ M. Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/ M. Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Michał Michalak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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7
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Traboulsi I, Dange NS, Pirenne V, Robert F, Landais Y. Enantioselective Total Synthesis of (+)‐Eucophylline. Chemistry 2022; 28:e202200088. [DOI: 10.1002/chem.202200088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Iman Traboulsi
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Nitin S. Dange
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Vincent Pirenne
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Frédéric Robert
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Yannick Landais
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
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8
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Shang XF, Morris-Natschke SL, Liu YQ, Li XH, Zhang JY, Lee KH. Biology of quinoline and quinazoline alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2022; 88:1-47. [PMID: 35305754 DOI: 10.1016/bs.alkal.2021.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Quinoline and quinazoline alkaloids, two important classes of N-based heterocyclic compounds, have attracted scientific and popular interest worldwide since the 19th century. More than 600 compounds have been isolated from nature to date. To build on our two prior reviews, we reexamined the promising molecules described in previous reports and provided updated literature on novel quinoline and quinazoline alkaloids isolated over the past 5 years. This chapter reviews and discusses 205 molecules with a broad range of bioactivities, including antiparasitic and insecticidal, antibacterial and antifungal, cardioprotective, antiviral, anti-inflammatory, and other effects. This survey should provide new clues or possibilities for the discovery of new and better drugs from the original naturally occurring quinoline and quinazoline alkaloids.
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Affiliation(s)
- Xiao-Fei Shang
- Beijing You'an Hospital, Capital Medical University, Beijing, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, PR China; School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, United States; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan.
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, PR China.
| | - Xiu-Hui Li
- Beijing You'an Hospital, Capital Medical University, Beijing, PR China.
| | - Ji-Yu Zhang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, United States; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan
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9
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Reimann CE, Ngamnithiporn A, Hayashida K, Saito D, Korch KM, Stoltz BM. The Enantioselective Synthesis of Eburnamonine, Eucophylline, and 16′‐
epi
‐Leucophyllidine. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christopher E. Reimann
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
| | - Aurapat Ngamnithiporn
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
- Laboratory of Medicinal Chemistry Chulabhorn Research Institute 54 Kamphaeng Phet 6 Road Bangkok 10210 Thailand
| | - Kohei Hayashida
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
- Discovery Research Laboratories Nippon Chemiphar Co., Ltd. 1–22 Hikokawado Misato Saitama 341-005 Japan
| | - Daisuke Saito
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
- Discovery Research Laboratories Nippon Chemiphar Co., Ltd. 1–22 Hikokawado Misato Saitama 341-005 Japan
| | - Katerina M. Korch
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
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10
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Reimann CE, Ngamnithiporn A, Hayashida K, Saito D, Korch KM, Stoltz BM. The Enantioselective Synthesis of Eburnamonine, Eucophylline, and 16'-epi-Leucophyllidine. Angew Chem Int Ed Engl 2021; 60:17957-17962. [PMID: 34036708 PMCID: PMC8338904 DOI: 10.1002/anie.202106184] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Indexed: 11/08/2022]
Abstract
A synthetic approach to the heterodimeric bisindole alkaloid leucophyllidine is disclosed herein. An enantioenriched lactam building block, synthesized through palladium-catalyzed asymmetric allylic alkylation, served as the precursor to both hemispheres. The eburnamonine-derived fragment was synthesized through a Bischler-Napieralski/hydrogenation approach, while the eucophylline-derived fragment was synthesized by Friedländer quinoline synthesis and two sequential C-H functionalization steps. A convergent Stille coupling and phenol-directed hydrogenation united the two monomeric fragments to afford 16'-epi-leucophyllidine in 21 steps from commercial material.
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Affiliation(s)
- Christopher E. Reimann
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
| | - Aurapat Ngamnithiporn
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Bangkok, 10210, Thailand
| | - Kohei Hayashida
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
- Discovery Research Laboratories, Nippon Chemiphar Co., Ltd. 1-22 Hikokawado, Misato, Saitama 341-005, Japan
| | - Daisuke Saito
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
- Discovery Research Laboratories, Nippon Chemiphar Co., Ltd. 1-22 Hikokawado, Misato, Saitama 341-005, Japan
| | - Katerina M. Korch
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, 1200 E. California Blvd. MC 101-20, Pasadena, CA 91125 (USA)
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11
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Discovery of natural anti-inflammatory alkaloids: Potential leads for the drug discovery for the treatment of inflammation. Eur J Med Chem 2021; 213:113165. [PMID: 33454546 DOI: 10.1016/j.ejmech.2021.113165] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 02/07/2023]
Abstract
Inflammation is an adaptive response of the immune system to tissue malfunction or homeostatic imbalance. Corticosteroids and non-steroidal anti-inflammatory drugs (NSAIDs) are frequently applied to treat varieties of inflammatory diseases but are associated with gastrointestinal, cardiovascular, and kidney side effects. Developing more effective and less toxic agents remain a challenge for pharmaceutical chemist due to the complexity of the different inflammatory processes. Alkaloids are widely distributed in plants with diverse anti-inflammatory activities, providing various potential lead compounds or candidates for the design and discovery of new anti-inflammatory drug candidates. Therefore, re-examining the anti-inflammatory alkaloid natural products is advisable, bringing more opportunities. In this review, we summarized and described the recent advances of natural alkaloids with anti-inflammatory activities and possible mechanisms in the period from 2009 to 2020. It is hoped that this review of anti-inflammatory alkaloids can provide new ideas for researchers engaged in the related fields and potential lead compounds for the discovery of anti-inflammatory drugs.
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12
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Song L, Van der Eycken EV. Transition Metal-Catalyzed Intermolecular Cascade C-H Activation/Annulation Processes for the Synthesis of Polycycles. Chemistry 2020; 27:121-144. [PMID: 32530508 DOI: 10.1002/chem.202002110] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 12/16/2022]
Abstract
Polycycles are abundantly present in numerous advanced chemicals, functional materials, bioactive molecules and natural products. However, the strategies for the synthesis of polycycles are limited to classical reactions and transition metal-catalyzed cross-coupling reactions, requiring pre-functionalized starting materials and lengthy synthetic operations. The emergence of novel approaches shows great promise for the fields of organic/medicinal/materials chemistry. Among them, transition metal-catalyzed C-H activation followed by intermolecular annulation reactions prevail, due to their straightforward manner with high atom- and step-economy, providing rapid, concise and efficient methods for the construction of diverse polycycles. Several strategies have been developed for the synthesis of polycycles, relying on sequential multiple C-H activation/annulation, or combination of C-H activation/annulation and further interaction with a proximal group, or merger of C-H activation with a cycloaddition reaction, or in situ formation of the directing group. These are attractive, efficient, step- and atom-economic methods starting from commercially available materials. This Minireview will provide an introduction to transition metal-catalyzed C-H activation for the synthesis of polycycles, helping researchers to discover indirect connections and reveal hidden opportunities. It will also promote the discovery of novel synthetic strategies relying on C-H activation.
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya street, Moscow, 117198, Russia
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13
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Chaudhari C, Sato K, Ogura Y, Miayahara S, Nagaoka K. Pr
2
O
3
Supported Nano‐layered Ruthenium Catalyzed Acceptorless Dehydrogenative Synthesis of 2‐Substituted Quinolines and 1,8‐Naphthyridines from 2‐Aminoaryl Alcohols and Ketones. ChemCatChem 2020. [DOI: 10.1002/cctc.201902311] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chandan Chaudhari
- Department of Chemical Systems Engineering Graduate school of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Katsutoshi Sato
- Department of Chemical Systems Engineering Graduate school of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University 1-30 Goryo-Ohara Nishikyo-ku Kyoto 615-8245 Japan
| | - Yuta Ogura
- Department of Chemical Systems Engineering Graduate school of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Shin‐Ichiro Miayahara
- Department of Chemical Systems Engineering Graduate school of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Katsutoshi Nagaoka
- Department of Chemical Systems Engineering Graduate school of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
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14
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Ghobadi N, Nazari N, Gholamzadeh P. The Friedländer reaction: A powerful strategy for the synthesis of heterocycles. ADVANCES IN HETEROCYCLIC CHEMISTRY 2020. [DOI: 10.1016/bs.aihch.2020.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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15
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Nugroho AE, Morita H. Computationally-assisted discovery and structure elucidation of natural products. J Nat Med 2019; 73:687-695. [PMID: 31093833 PMCID: PMC6713678 DOI: 10.1007/s11418-019-01321-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/07/2019] [Indexed: 12/30/2022]
Abstract
Computer hardware development coupled with the development of quantum chemistry, new computational models and algorithms, and user-friendly interfaces have lowered the barriers to the use of computation in the discovery and structure elucidation of natural products. Consequently, the use of computational chemistry software as a tool to discover and determine the structure of natural products has become more common in recent years. In this review, we provide several examples of recent studies that used computer technology to facilitate the discovery and structure determination of various natural products.
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Affiliation(s)
- Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Hiroshi Morita
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan.
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16
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Tang Y, Nugroho AE, Hirasawa Y, Tougan T, Horii T, Hadi AHA, Morita H. Leucophyllinines A and B, bisindole alkaloids from Leuconotis eugeniifolia. J Nat Med 2019; 73:533-540. [PMID: 30911994 DOI: 10.1007/s11418-019-01297-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 03/07/2019] [Indexed: 02/06/2023]
Abstract
Two new bisindole alkaloids, leucophyllinines A (1) and B (2) consisting of eburnane and quebrachamine-type skeletons were isolated from the bark of Leuconotis eugeniifolia, and their structures were elucidated on the basis of spectroscopic data. Leucophyllinines A and B showed antiplasmodial activities against Plasmodium falciparum 3D7.
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Affiliation(s)
- Yiming Tang
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Yusuke Hirasawa
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Takahiro Tougan
- Department of Molecular Protozoology, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Toshihiro Horii
- Department of Molecular Protozoology, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - A Hamid A Hadi
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hiroshi Morita
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan.
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17
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Nugroho AE, Zhang W, Hirasawa Y, Tang Y, Wong CP, Kaneda T, Hadi AHA, Morita H. Bisleuconothines B-D, Modified Eburnane-Aspidosperma Bisindole Alkaloids from Leuconotis griffithii. JOURNAL OF NATURAL PRODUCTS 2018; 81:2600-2604. [PMID: 30362746 DOI: 10.1021/acs.jnatprod.8b00749] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Three new bisindole alkaloids, bisleuconothines B-D (1-3), were isolated from the bark of Leuconotis griffithii. Their structures were elucidated by 1D and 2D NMR spectroscopy and DFT calculations. Bisleuconothine B (1) is the first monoterpene indole alkaloid dimer featuring bridges between both C-16-C-10' and C-2-O-C-9'. All compounds were deemed noncytotoxic (IC50 > 10 μM) when tested against A549 human lung adenocarcinoma cells.
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Affiliation(s)
- Alfarius Eko Nugroho
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - Wenjia Zhang
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - Yusuke Hirasawa
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - Yiming Tang
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - Chin Piow Wong
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - Toshio Kaneda
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
| | - A Hamid A Hadi
- Department of Chemistry, Faculty of Science , University Malaya , 50603 Kuala Lumpur , Malaysia
| | - Hiroshi Morita
- Hoshi University Faculty of Pharmaceutical Sciences , Hoshi University , Shinagawa, Tokyo 142-8501 , Japan
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18
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Hsueh NC, Lai KS, Chang MY. Stereocontrolled Construction of 1-Vinylindanes via Intramolecular Cyclization of o-Cinnamyl Chalcones. J Org Chem 2018; 83:11415-11424. [PMID: 30122047 DOI: 10.1021/acs.joc.8b01729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In this paper, a concise route for the synthesis of 1-vinylindanes is described, including (i) NaBH4-mediated reduction of o-cinnamyl chalcones and (ii) sequential BF3·OEt2-mediated intramolecular annulation of the resulting alkenols. The plausible mechanism is proposed and discussed herein. This protocol provides highly effective stereocontrolled cinnamyl-enone cross-coupling to construct three contiguous trans- trans stereocenters and one ( E)-configured alkenyl or styryl group.
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Affiliation(s)
- Nein-Chen Hsueh
- Department of Medicinal and Applied Chemistry , Kaohsiung Medical University , Kaohsiung 807 , Taiwan
| | - Kai-Shang Lai
- Department of Medicinal and Applied Chemistry , Kaohsiung Medical University , Kaohsiung 807 , Taiwan
| | - Meng-Yang Chang
- Department of Medicinal and Applied Chemistry , Kaohsiung Medical University , Kaohsiung 807 , Taiwan.,Department of Medical Research , Kaohsiung Medical University Hospital , Kaohsiung 807 , Taiwan
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19
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Hassan H, Marsden SP, Nelson A. Design and synthesis of a fragment set based on twisted bicyclic lactams. Bioorg Med Chem 2018; 26:3030-3033. [DOI: 10.1016/j.bmc.2018.02.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/15/2018] [Accepted: 02/16/2018] [Indexed: 01/25/2023]
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20
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Shang XF, Morris-Natschke SL, Yang GZ, Liu YQ, Guo X, Xu XS, Goto M, Li JC, Zhang JY, Lee KH. Biologically active quinoline and quinazoline alkaloids part II. Med Res Rev 2018; 38:1614-1660. [PMID: 29485730 DOI: 10.1002/med.21492] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 01/16/2018] [Accepted: 01/31/2018] [Indexed: 02/06/2023]
Abstract
To follow-up on our prior Part I review, this Part II review summarizes and provides updated literature on novel quinoline and quinazoline alkaloids isolated during the period of 2009-2016, together with the biological activity and the mechanisms of action of these classes of natural products. Over 200 molecules with a broad range of biological activities, including antitumor, antiparasitic and insecticidal, antibacterial and antifungal, cardioprotective, antiviral, anti-inflammatory, hepatoprotective, antioxidant, anti-asthma, antitussive, and other activities, are discussed. This survey should provide new clues or possibilities for the discovery of new and better drugs from the original naturally occurring quinoline and quinazoline alkaloids.
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Affiliation(s)
- Xiao-Fei Shang
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture, Key Laboratory of New Animal Drug Project, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, P.R. China.,School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina
| | - Guan-Zhou Yang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Xiao Guo
- Tibetan Medicine Research Center of Qinghai University, Qinghai University Tibetan Medical College, Qinghai University, Xining, P.R. China
| | - Xiao-Shan Xu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina
| | - Jun-Cai Li
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ji-Yu Zhang
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture, Key Laboratory of New Animal Drug Project, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, P.R. China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina.,Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan
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21
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Liu L, Bao L, Wang L, Ma K, Han J, Yang Y, Liu R, Ren J, Yin W, Wang W, Liu H. Asperorydines A–M: Prenylated Tryptophan-Derived Alkaloids with Neurotrophic Effects from Aspergillus oryzae. J Org Chem 2018; 83:812-822. [DOI: 10.1021/acs.joc.7b02802] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li Liu
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Li Bao
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Long Wang
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
| | - Ke Ma
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Junjie Han
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Yanlong Yang
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
| | - Ruixing Liu
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Jinwei Ren
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
| | - Wenbing Yin
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Wenzhao Wang
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
| | - Hongwei Liu
- State
Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
- Savaid
Medical School, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
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22
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Yi R, Li X, Wan B. Merging Gold Catalysis and Brønsted Acid Catalysis for the Synthesis of Tetrahydrobenzo[b][1,8]naphthyridines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ruxia Yi
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023, People's Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Xincheng Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023, People's Republic of China
| | - Boshun Wan
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023, People's Republic of China
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23
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Pandey G, Mishra A, Khamrai J. Asymmetric Total Synthesis of Eburnamine and Eucophylline: A Biomimetic Attempt for the Total Synthesis of Leucophyllidine. Org Lett 2017; 19:3267-3270. [DOI: 10.1021/acs.orglett.7b01410] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
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24
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Dey A, Mukherjee A, Chaudhury M. Alkaloids From Apocynaceae. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63931-8.00010-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Hassan H, Mohammed S, Robert F, Landais Y. Total Synthesis of (±)-Eucophylline. A Free-Radical Approach to the Synthesis of the Azabicyclo[3.3.1]nonane Skeleton. Org Lett 2015; 17:4518-21. [PMID: 26348122 DOI: 10.1021/acs.orglett.5b02218] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first total synthesis of eucophylline was reported in 10 steps and 10% overall yield. The naphthyridine core of eucophylline was prepared through the coupling between a strained azabicyclo[3.3.1]nonan-2-one and a trisubstituted benzonitrile, followed by a cyclization of the corresponding amidine. This coupling reaction was shown to proceed through a stable bicyclic chloroenamine intermediate. The azabicyclo[3.3.1]nonan-2-one skeleton was in turn accessible through a straightforward sequence including a free-radical three-component olefin carbo-oximation as a key step.
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Affiliation(s)
- Haitham Hassan
- University of Bordeaux , Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
| | - Shireen Mohammed
- University of Bordeaux , Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
| | - Frédéric Robert
- University of Bordeaux , Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
| | - Yannick Landais
- University of Bordeaux , Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
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26
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Jayakumar J, Parthasarathy K, Chen YH, Lee TH, Chuang SC, Cheng CH. One-Pot Synthesis of Highly Substituted Polyheteroaromatic Compounds by Rhodium(III)-Catalyzed Multiple CH Activation and Annulation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405183] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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27
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Jayakumar J, Parthasarathy K, Chen YH, Lee TH, Chuang SC, Cheng CH. One-Pot Synthesis of Highly Substituted Polyheteroaromatic Compounds by Rhodium(III)-Catalyzed Multiple CH Activation and Annulation. Angew Chem Int Ed Engl 2014; 53:9889-92. [DOI: 10.1002/anie.201405183] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 06/12/2014] [Indexed: 11/09/2022]
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28
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Nugroho AE, Morita H. Circular dichroism calculation for natural products. J Nat Med 2013; 68:1-10. [PMID: 23564068 PMCID: PMC3853375 DOI: 10.1007/s11418-013-0768-x] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 03/21/2013] [Indexed: 11/03/2022]
Abstract
Determination of the absolute configuration (AC) is often a challenging aspect in the structure elucidation of natural products. When chiral compounds possess appropriate chromophore(s), electronic circular dichroism (ECD) may provide a powerful approach to the determination of their absolute configuration. Recently, ECD calculations by time-dependent density functional theory (TDDFT) have come to be used more commonly. In the present review, we give several examples of recent studies using TDDFT-calculated ECD spectra for the AC determination of natural products.
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Affiliation(s)
- Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
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29
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Liu L, Cao JX, Yao YC, Xu SP. Progress of pharmacological studies on alkaloids from Apocynaceae. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2012; 15:166-184. [PMID: 23249181 DOI: 10.1080/10286020.2012.747521] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Alkaloid was a kind of biological active ingredient. There were various types of alkaloids in Apocynaceae. This paper reviewed the progress on alkaloids from Apocynaceae, which contained origin, structure, and pharmacological activity.
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Affiliation(s)
- Lu Liu
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650504, China
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30
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Morita H, Eko Nugroho A. Absolute Configurational Elucidation of Monoterpene Indole Alkaloids by Circular Dichroism. HETEROCYCLES 2012. [DOI: 10.3987/rev-11-sr(p)2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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