1
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Zhang Q, Lei XQ, Wei FT, Ren JQ, Shi JG, Guo QL. Minor alkaloids from an aqueous extract of the hook-bearing stem of Uncaria rhynchophylla. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024; 26:4-17. [PMID: 37888783 DOI: 10.1080/10286020.2023.2273807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 10/18/2023] [Indexed: 10/28/2023]
Abstract
Seven new monoterpene alkaloids (1 - 7), along with 16 known analogues, were isolated from an aqueous decoction of the hook-bearing stems of Uncaria rhynchophylla (Gou-teng). Their structures were determined by spectroscopic data analysis, single crystal X-ray diffraction, and electronic circular dichroism (ECD) calculations. Compounds 1 and 2 are stereoisomers belonging to a novel type of pseudoindoxyl monoterpene alkaloids, 3 is the first monoterpene furoindole alkaloid from nature, and 4 - 7 are derivatives of the known monoterpene alkaloids featuring different structures.
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Affiliation(s)
- Qing Zhang
- 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
| | - Xiao-Qiang Lei
- 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
| | - Fang-Ting Wei
- 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
| | - Jin-Qiu Ren
- 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
| | - Jian-Gong Shi
- 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
| | - Qing-Lan Guo
- 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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2
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Qu H, Chen Y, Ceng X, Tang P, Wang H, Chen F. Enantioselective Synthesis of Chiral 3‐Alkynyl‐3‐hydroxyindolin‐2‐ones by Zn/bis(sulfonamide)–diamine Catalyzed Asymmetric Addition of Alkynes to Isatins. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hongmin Qu
- Sichuan University West China School of Pharmacy CHINA
| | - Yu Chen
- Sichuan University West China School of Pharmacy CHINA
| | | | - Pei Tang
- Sichuan University West China School of Pharmacy CHINA
| | - Huijing Wang
- Sichuan University West China School of Pharmacy CHINA
| | - Fener Chen
- Fudan University Department of Chemistry Handan Road 220 200433 Shanghai CHINA
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3
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Salim F, Yunus YM, Anouar EH, Awang K, Langat M, Cordell GA, Ahmad R. Absolute Configuration of Alkaloids from Uncaria longiflora through Experimental and Computational Approaches. JOURNAL OF NATURAL PRODUCTS 2019; 82:2933-2940. [PMID: 31686505 DOI: 10.1021/acs.jnatprod.8b00380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The structure elucidation of three new alkaloids named isoformosaninol (1), formosaninol (2), and longiflorine (3), isolated from the leaves of Uncaria longiflora var. pteropoda (Miq.) Ridsdale, along with their biosynthetic pathways are discussed. Their absolute structures were determined through a combination of physical data interpretation and quantum chemical calculations using the time-dependent density functional theory (TDDFT) method.
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Affiliation(s)
- Fatimah Salim
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns) , Universiti Teknologi MARA Selangor Branch , Puncak Alam Campus , 42300 Bandar Puncak Alam , Selangor , Malaysia
| | - Yusri Mohd Yunus
- Faculty of Applied Sciences , Universiti Teknologi MARA , 40450 Shah Alam , Selangor , Malaysia
| | - El Hassane Anouar
- Department of Chemistry, College of Sciences and Humanites , Prince Sattam bin Abdulaziz University , P.O. Box 83, 11942 , Al Kharj , Saudi Arabia
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science , University Malaya , 50603 Kuala Lumpur , Malaysia
| | - Moses Langat
- Natural Product Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences , University of Surrey , Guildford GU2 7XH , United Kingdom
- Jodrell Laboratory, Natural Capital and Plant Health Department, Royal Botanic Gardens , Kew, Richmond, Surrey TW9 3DS , United Kingdom
| | - Geoffrey A Cordell
- Natural Products Inc. , Evanston , Illinois 60203 , United States
- College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Rohaya Ahmad
- Faculty of Applied Sciences , Universiti Teknologi MARA , 40450 Shah Alam , Selangor , Malaysia
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4
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Li H, Sun W, Deng M, Zhou Q, Wang J, Liu J, Chen C, Qi C, Luo Z, Xue Y, Zhu H, Zhang Y. Asperversiamides, Linearly Fused Prenylated Indole Alkaloids from the Marine-Derived Fungus Aspergillus versicolor. J Org Chem 2018; 83:8483-8492. [PMID: 30016097 DOI: 10.1021/acs.joc.8b01087] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Asperversiamides A-H (1-8), eight linearly fused prenylated indole alkaloids featuring an unusual pyrano[3,2- f]indole unit, were isolated from the marine-derived fungus Aspergillus versicolor. The structures and absolute configurations of these compounds were elucidated by extensive spectroscopic analyses, single-crystal X-ray diffraction, electronic circular dichroism (ECD) calculations, and optical rotation (OR) calculations. The relative configuration of C-21 of iso-notoamide B was herein revised, and a new methodology for preliminarily determining if the relative configuration of the bicyclo[2.2.2]diazaoctane moiety of a spiro-bicyclo[2.2.2]diazaoctane-type indole alkaloid is syn or anti was developed. The anti-inflammatory activities of the isolated compounds were all tested, and of these compounds, 7 exhibited a potent inhibitory effect against iNOS with an IC50 value of 5.39 μM.
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Affiliation(s)
- Huaqiang Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Weiguang Sun
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Mengyi Deng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Qun Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Jianping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Junjun Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Chunmei Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Changxing Qi
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Zengwei Luo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Yongbo Xue
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College , Huazhong University of Science and Technology Wuhan 430030 , China
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5
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Nugroho AE, Moue M, Sasaki T, Shirota O, Hadi AHA, Morita H. Yohimbine-related Alkaloids from Tabernaemontana corymbosa. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Five new yohimbine-type indole alkaloids were isolated from the leaves of Tabernaemontana corymbosa. Their structures were determined on the basis of the NMR and Circular Dichroism (CD) spectroscopy.
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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
| | - Miho Moue
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
| | - Tadahiro Sasaki
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
| | - Osamu Shirota
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314–1 Shido, Sanuki City, Kagawa 769–2193, Japan
| | - A. Hamid. A. Hadi
- Department of Chemistry, Faculty of Science, University 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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6
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Montesinos-Magraner M, Vila C, Blay G, Fernández I, Muñoz MC, Pedro JR. Hydroxy-Directed Enantioselective Hydroxyalkylation in the Carbocyclic Ring of Indoles. Org Lett 2017; 19:1546-1549. [DOI: 10.1021/acs.orglett.7b00354] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Marc Montesinos-Magraner
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Carlos Vila
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Gonzalo Blay
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Isabel Fernández
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - M. Carmen Muñoz
- Departament
de Física Aplicada, Universitat Politècnica de València, València 46022, Spain
| | - José R. Pedro
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
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7
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Pan HQ, Yang WZ, Zhao D, Luo C, Yao CL, Shi XJ, Zhang YB, Li SY, Bi Y, Wang Z, Yao S, Wu WY, Guo DA. New monoterpenoid oxindole alkaloid derivatives from the stems of Uncaria hirsuta Havil. and their cytotoxicity and tandem mass spectrometric fragmentation. Fitoterapia 2017; 116:85-92. [DOI: 10.1016/j.fitote.2016.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/11/2016] [Accepted: 11/19/2016] [Indexed: 01/19/2023]
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8
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Hahn D, Kim H, Yang I, Chin J, Hwang H, Won DH, Lee B, Nam SJ, Ekins M, Choi H, Kang H. The Halicylindramides, Farnesoid X Receptor Antagonizing Depsipeptides from a Petrosia sp. Marine Sponge Collected in Korea. JOURNAL OF NATURAL PRODUCTS 2016; 79:499-506. [PMID: 26821210 DOI: 10.1021/acs.jnatprod.5b00871] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three new structurally related depsipeptides, halicylindramides F-H (1-3), and two known halicylindramides were isolated from a Petrosia sp. marine sponge collected off the shore of Youngdeok-Gun, East Sea, Republic of Korea. Their planar structures were elucidated by extensive spectroscopic data analyses including 1D and 2D NMR data as well as MS data. The absolute configurations of halicylindramides F-H (1-3) were determined by Marfey's method in combination with Edman degradation. The absolute configurations at C-4 of the dioxyindolyl alanine (Dioia) residues of halicylindramides G (2) and H (3) were determined as 4S and 4R, respectively, based on ECD spectroscopy. The C-2 configurations of Dioia in 2 and 3 were speculated to both be 2R based on the shared biogenesis of the halicylindramides. Halicylindramides F (1), A (4), and C (5) showed human farnesoid X receptor (hFXR) antagonistic activities, but did not bind directly to hFXR.
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Affiliation(s)
- Dongyup Hahn
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation , Daegu, 41061, Republic of Korea
| | - Hiyoung Kim
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
| | - Inho Yang
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
| | - Jungwook Chin
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation , Daegu, 41061, Republic of Korea
| | - Hoosang Hwang
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
| | - Dong Hwan Won
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
| | - Byoungchan Lee
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
| | - Sang-Jip Nam
- Department of Chemistry and Nano Science, Global Top 5 Program, Ewha Womans University , Seoul, 03760, Republic of Korea
| | - Merrick Ekins
- Queensland Museum , P.O. Box 3300, South Brisbane, Queensland 4101, Australia
| | - Hyukjae Choi
- College of Pharmacy, Yeungnam University , Gyeongsan, 38541, Republic of Korea
| | - Heonjoong Kang
- School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 08826, Republic of Korea
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9
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Miao CB, Zeng YM, Shi T, Liu R, Wei PF, Sun XQ, Yang HT. 2-Oxindole Acts as a Synthon of 2-Aminobenzoyl Anion in the K2CO3-Catalyzed Reaction with Enones: Preparation of 1,4-Diketones Bearing an Amino Group and Their Further Transformations. J Org Chem 2015; 81:43-50. [DOI: 10.1021/acs.joc.5b02054] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Chun-Bao Miao
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Yu-Mei Zeng
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Tong Shi
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Rui Liu
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Peng-Fei Wei
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Xiao-Qiang Sun
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Hai-Tao Yang
- Jiangsu
Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
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10
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Kwon J, Seo YH, Lee JE, Seo EK, Li S, Guo Y, Hong SB, Park SY, Lee D. Spiroindole Alkaloids and Spiroditerpenoids from Aspergillus duricaulis and Their Potential Neuroprotective Effects. JOURNAL OF NATURAL PRODUCTS 2015; 78:2572-2579. [PMID: 26517152 DOI: 10.1021/acs.jnatprod.5b00508] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Six new spiroindole alkaloids (1-6) and two new spiroditerpenoids (7 and 8) were isolated from an EtOAc extract of Aspergillus duricaulis culture media together with five known compounds. The structures of the isolated compounds were elucidated by analysis of NMR and MS data, and the absolute configurations of compounds 1-8 were confirmed by CD spectroscopic methods. All isolated compounds were evaluated for their inhibition of beta-amyloid (Aβ) aggregate-induced toxicity in PC12 cells and Aβ aggregation. Compounds 8-11 efficiently protected PC12 cells against Aβ aggregate-induced toxicity, but only compound 9 inhibited Aβ aggregation. On the other hand, compounds 4 and 5 exhibited moderate inhibitory effects on Aβ aggregation, but did not protect the cells from Aβ aggregate-induced toxicity. Preincubating Aβ monomers with compounds 4 and 5 rescued PC12 cells against Aβ aggregate-induced toxicity by reducing neurotoxic Aβ aggregates. Compound 9 inhibited both Aβ aggregate-induced toxicity and Aβ aggregation.
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Affiliation(s)
- Jaeyoung Kwon
- Department of Biosystems and Biotechnology, College of Life Sciences and Biotechnology, Korea University , Seoul 02841, Republic of Korea
| | - Young Hye Seo
- Department of Biosystems and Biotechnology, College of Life Sciences and Biotechnology, Korea University , Seoul 02841, Republic of Korea
| | - Jae-Eun Lee
- Laboratory of Pharmacognosy, College of Pharmacy, Dankook University , Cheonan 31116, Republic of Korea
| | - Eun-Kyoung Seo
- College of Pharmacy, Ewha Womans University , Seoul 03760, Republic of Korea
| | - Shen Li
- Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University , Tianjin 300071, People's Republic of China
| | - Yuanqiang Guo
- Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University , Tianjin 300071, People's Republic of China
| | - Seung-Beom Hong
- Korean Agricultural Culture Collection, National Academy of Agricultural Science , Wanju 55365, Republic of Korea
| | - So-Young Park
- Laboratory of Pharmacognosy, College of Pharmacy, Dankook University , Cheonan 31116, Republic of Korea
| | - Dongho Lee
- Department of Biosystems and Biotechnology, College of Life Sciences and Biotechnology, Korea University , Seoul 02841, Republic of Korea
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11
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Kabeshov MA, Kysilka O, Rulíšek L, Suleimanov YV, Bella M, Malkov AV, Kočovský P. Cross-Aldol Reaction of Isatin with Acetone Catalyzed by Leucinol: A Mechanistic Investigation. Chemistry 2015; 21:12026-33. [PMID: 26147182 DOI: 10.1002/chem.201500536] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Indexed: 11/09/2022]
Abstract
Comprehensive mechanistic studies on the enantioselective aldol reaction between isatin (1 a) and acetone, catalyzed by L-leucinol (3 a), unraveled that isatin, apart from being a substrate, also plays an active catalytic role. Conversion of the intermediate oxazolidine 4 into the reactive syn-enamine 6, catalyzed by isatin, was identified as the rate-determining step by both the calculations (ΔG(≠) =26.1 kcal mol(-1) for the analogous L-alaninol, 3 b) and the kinetic isotope effect (kH /kD =2.7 observed for the reaction using [D6 ]acetone). The subsequent reaction of the syn-enamine 6 with isatin produces (S)-2 a (calculated ΔG(≠) =11.6 kcal mol(-1) ). The calculations suggest that the overall stereochemistry is controlled by two key events: 1) the isatin-catalyzed formation of the syn-enamine 6, which is thermodynamically favored over its anti-rotamer 7 by 2.3 kcal mol(-1) ; and 2) the high preference of the syn-enamine 6 to produce (S)-2 a on reaction with isatin (1 a) rather than its enantiomer (ΔΔG(≠) =2.6 kcal mol(-1) ).
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Affiliation(s)
- Mikhail A Kabeshov
- Department of Chemistry, Loughborough University, Loughborough, Leics LE11 3TU (UK). .,Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (UK).
| | - Ondřej Kysilka
- FARMAK, Klášterní Hradisko, 77900 Olomouc (Czech Republic)
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6 (Czech Republic)
| | - Yury V Suleimanov
- Computation-based Science and Technology Research Center, Cyprus Institute, 20 Kavafi Str., Nicosia 2121 (Cyprus) & Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (USA)
| | - Marco Bella
- Department of Chemistry, "Sapienza" University of Rome, Piazzale Aldo Moro 5, 00185 Rome (Italy)
| | - Andrei V Malkov
- Department of Chemistry, Loughborough University, Loughborough, Leics LE11 3TU (UK).
| | - Pavel Kočovský
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6 (Czech Republic). .,Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE 10691 Stockholm (Sweden) & Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague 2 (Czech Republic).
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12
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Lee C, Sohn JH, Jang JH, Ahn JS, Oh H, Baltrusaitis J, Hwang IH, Gloer JB. Cycloexpansamines A and B: spiroindolinone alkaloids from a marine isolate of Penicillium sp. (SF-5292). J Antibiot (Tokyo) 2015; 68:715-8. [DOI: 10.1038/ja.2015.56] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/03/2015] [Accepted: 04/13/2015] [Indexed: 01/11/2023]
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13
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Ahmad R, Salim F. Oxindole Alkaloids of Uncaria (Rubiaceae, Subfamily Cinchonoideae). STUDIES IN NATURAL PRODUCTS CHEMISTRY 2015. [DOI: 10.1016/b978-0-444-63473-3.00012-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Li M, Wang Y, Tsoi B, Jin XJ, He RR, Yao XJ, Dai Y, Kurihara H, Yao XS. Indoleacetic acid derivatives from the seeds of Ziziphus jujuba var. spinosa. Fitoterapia 2014; 99:48-55. [DOI: 10.1016/j.fitote.2014.09.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 08/25/2014] [Accepted: 09/01/2014] [Indexed: 11/30/2022]
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15
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Hu XL, Bian XQ, Wu X, Li JY, Hua HM, Pei YH, Han AH, Bai J. Penioxalamine A, a novel prenylated spiro-oxindole alkaloid from Penicillium oxalicum TW01-1. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Niwa T, Ishii S, Hiramatsu A, Osawa T. Oxidative Reaction of Oxindole-3-acetic Acids. Biosci Biotechnol Biochem 2014; 67:1870-4. [PMID: 14519969 DOI: 10.1271/bbb.67.1870] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The oxindole-3-acetic acids, oxidative metabolites of indole-3-acetic acid, were isolated from a byproduct of a corn starch manufacturing plant, and were further converted to the 3-hydroxyl derivatives in the presence of metal ion. The mechanical study was followed by a chemical analysis including other byproducts, and suggested the presence of an intermediate that had a radical at the C-3 position of oxindole-3-acetic acids.
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Affiliation(s)
- Toshio Niwa
- Department of Merchandise Development, San-ei Sucrochemical Co., Ltd., Chita, Japan.
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17
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Pearson AJ, Panda S, Bunge SD. Synthesis of a Potential Intermediate for TMC-95A via an Organocatalyzed Aldol Reaction. J Org Chem 2013; 78:9921-8. [DOI: 10.1021/jo4017315] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anthony J. Pearson
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Santanu Panda
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Scott D. Bunge
- Department
of Chemistry, Kent State University, Kent, Ohio 44242, United States
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18
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Reyes-Rangel G, Bandala Y, García-Flores F, Juaristi E. Asymmetric Allylation of α-Ketoester-Derived N
-Benzoylhydrazones Promoted by Chiral Sulfoxides/N
-Oxides Lewis Bases: Highly Enantioselective Synthesis of Quaternary α-Substituted α-Allyl-α-Amino Acids. Chirality 2013; 25:529-40. [DOI: 10.1002/chir.22159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 12/28/2012] [Accepted: 01/04/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Gloria Reyes-Rangel
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México; D.F. México
| | - Yamir Bandala
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México; D.F. México
- Instituto de Biotecnología; Universidad Nacional Autónoma de México; Cuernavaca Morelos México
| | - Fred García-Flores
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México; D.F. México
| | - Eusebio Juaristi
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México; D.F. México
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19
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Chen M, Gan L, Lin S, Wang X, Li L, Li Y, Zhu C, Wang Y, Jiang B, Jiang J, Yang Y, Shi J. Alkaloids from the root of Isatis indigotica. JOURNAL OF NATURAL PRODUCTS 2012; 75:1167-76. [PMID: 22694318 DOI: 10.1021/np3002833] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Seventeen new alkaloids (1-17) and 14 known analogues have been isolated from an aqueous extract of the root of Isatis indigotica. The structures and absolute configurations of these compounds were determined by extensive spectroscopic data analysis, including 2D NMR, single-crystal X-ray crystallography using anomalous scattering of Cu Kα radiation, and electronic circular dichroism spectra calculations based on the quantum-mechanical time-dependent density functional theory. Compounds 1, 2, and 3 are the first examples of natural products with unique linkages between a molecule of 2-(4-methoxy-1H-indol-3-yl)acetonitrile and 2-(1H-indol-3-yl)acetonitrile, 2-(4-methoxy-1H-indol-3-yl)acetonitrile, and 4-hydroxyphenylethane, respectively. Compounds (-)-4 and (+)-4 represent the first natural products with the pyrrolo[2,3-b]indolo[5,5a,6-b,a]quinazoline skeleton. Some structural assignments for the new alkaloids suggest that the assignments made for certain previously reported alkaloids require revision. Compounds 1-3 and arvelexin (18) show antiviral activity against the influenza virus A/Hanfang/359/95 (H3N2), with IC(50) values of 3.70-12.35 μM, and 17 inhibits Coxsackie virus B3 replication with an IC(50) of 6.87 μM.
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Affiliation(s)
- Minghua Chen
- 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, People's Republic of China
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20
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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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21
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Chen H, Bai J, Fang ZF, Yu SS, Ma SG, Xu S, Li Y, Qu J, Ren JH, Li L, Si YK, Chen XG. Indole alkaloids and quassinoids from the stems of Brucea mollis. JOURNAL OF NATURAL PRODUCTS 2011; 74:2438-2445. [PMID: 22070654 DOI: 10.1021/np200712y] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Seven new indole alkaloids, bruceollines H-N (1-7), three new quassinoids, yadanziolides T-V (10-12), and four known analogues, bruceolline E (8), bruceolline F (9), bruceine D (13), and yadanziolide B (14), were isolated from an ethanol extract of the stems of Brucea mollis. The absolute configurations of compounds 2 and 5 were determined by comparison of their experimental and calculated ECD spectra. The absolute configuration of the known compound 9 was determined by using Mo2(OAc)4-induced CD analysis for the first time. Compounds 10, 13, and 14 exhibited cytotoxic activities with IC50 values of 3.00-5.81 μM.
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Affiliation(s)
- Hui Chen
- 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, People's Republic of China
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22
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New vasorelaxant indole alkaloids, villocarines A–D from Uncaria villosa. Bioorg Med Chem 2011; 19:4075-9. [DOI: 10.1016/j.bmc.2011.05.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Accepted: 05/09/2011] [Indexed: 11/20/2022]
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23
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Asymmetric total syntheses of (+)- and (-)-versicolamide B and biosynthetic implications. Nat Chem 2011; 1:63-8. [PMID: 20300443 DOI: 10.1038/nchem.110] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Diels-Alder reaction is one of the most well-studied, synthetically useful organic transformations. While a significant number of naturally occurring substances are postulated to arise by biosynthetic Diels-Alder reactions, rigorous confirmation of a mechanistically distinct natural Diels-Alderase enzyme remains elusive. Within this context, several related fungi within the Aspergillus genus produce a number of metabolites of opposite absolute configuration including (+)- or (-)-versicolamide B. These alkaloids are hypothesized to arise via biosynthetic Diels-Alder reactions implying that each Aspergillus species possesses enantiomerically distinct Diels-Alderases. Herein, experimental validation of these biosynthetic proposals via deployment of the IMDA reaction as a key step in the asymmetric total syntheses of (+)- and (-)-versicolamide B is described. Laboratory validation of the proposed biosynthetic Diels-Alder construction, coupled with the secondary metabolite profile of the producing fungi, reveals that each Aspergillus species has evolved enantiomerically distinct indole oxidases, as well as enantiomerically distinct Diels-Alderases.
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24
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Aikawa K, Mimura S, Numata Y, Mikami K. Palladium-Catalyzed Enantioselective Ene and Aldol Reactions with Isatins, Keto Esters, and Diketones: Reliable Approach to Chiral Tertiary Alcohols. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001356] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Robinson SJ, Morinaka BI, Amagata T, Tenney K, Bray WM, Gassner NC, Lokey RS, Crews P. New structures and bioactivity properties of jasplakinolide (jaspamide) analogues from marine sponges. J Med Chem 2010; 53:1651-61. [PMID: 20121114 DOI: 10.1021/jm9013554] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The goal of this study was to isolate and study additional jasplakinolide analogues from two taxonomically distinct marine sponges including two Auletta spp. and one Jaspis splendens. This led to the isolation of jasplakinolide (1) and eleven jasplakinolide analogues (3-13) including seven new analogues (6-10, 12, and 13). Structure elucidation of the new compounds was based on a combination of 1D and 2D NMR analysis, optical rotation, circular dichroism, and preparation of Mosher's esters. Five of the new compounds are oxidized tryptophan derivatives of 1, including a unique quinazoline derivative (9). Compounds 1, 3, 5-8, and 11 were evaluated in the NCI 60 cell line screen, and all compounds were tested in a microfilament disruption assay. Jasplakinolide B (11) exhibited potent cytotoxicity (GI(50) < 1 nM vs human colorectal adenocarcinoma (HCT-116) cells) but did not exhibit microfilament-disrupting activity at 80 nM.
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Affiliation(s)
- Sarah J Robinson
- Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz,California 95064, USA
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26
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Deng J, Zhang S, Ding P, Jiang H, Wang W, Li J. Facile Creation of 3-Indolyl-3-hydroxy-2-oxindoles by an Organocatalytic Enantioselective Friedel-Crafts Reaction of Indoles with Isatins. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900851] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Ma B, Wu CF, Yang JY, Wang R, Kano Y, Yuan D. Three New Alkaloids from the Leaves ofUncaria rhynchophylla. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200900021] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Lin Z, Zhu T, Fang Y, Gu Q. 1H and 13C NMR assignments of two new indolic enamide diastereomers from a mangrove endophytic fungus Aspergillus sp. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:1212-1216. [PMID: 18846581 DOI: 10.1002/mrc.2341] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Terpeptin A (1) and B (2), two new members of the indolic enamides, along with three known compounds (3-5) were identified from a strain of Aspergillus sp. (w-6), an endophytic fungus associated with Acanthus ilicifolius. The complete (1)H and (13)C NMR assignments for these compounds were carried out using (1)H, (13)C, DEPT, COSY, HMQC, and HMBC NMR experiments. Terpeptin A and B exhibited modest cytotoxicity against A-549 cell line.
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Affiliation(s)
- Zhenjian Lin
- Key laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
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29
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Greshock TJ, Grubbs AW, Jiao P, Wicklow DT, Gloer JB, Williams RM. Isolation, structure elucidation, and biomimetic total synthesis of versicolamide B, and the isolation of antipodal (-)-stephacidin A and (+)-notoamide B from Aspergillus versicolor NRRL 35600. Angew Chem Int Ed Engl 2008; 47:3573-7. [PMID: 18389509 DOI: 10.1002/anie.200800106] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas J Greshock
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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30
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Greshock T, Grubbs A, Jiao P, Wicklow D, Gloer J, Williams R. Isolation, Structure Elucidation, and Biomimetic Total Synthesis of Versicolamide B, and the Isolation of Antipodal (−)-Stephacidin A and (+)-Notoamide B fromAspergillus versicolor NRRL 35600. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200800106] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Jiang MM, Zhang X, Dai Y, Gao H, Liu HW, Wang NL, Ye WC, Yao XS. Alkaloids from the root barks of Goniothalamus cheliensis. CHINESE CHEM LETT 2008. [DOI: 10.1016/j.cclet.2008.01.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Malkov AV, Kabeshov MA, Bella M, Kysilka O, Malyshev DA, Pluháčková K, Kočovský P. Vicinal Amino Alcohols as Organocatalysts in Asymmetric Cross-Aldol Reaction of Ketones: Application in the Synthesis of Convolutamydine A. Org Lett 2007; 9:5473-6. [DOI: 10.1021/ol7023983] [Citation(s) in RCA: 161] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrei V. Malkov
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Mikhail A. Kabeshov
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Marco Bella
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Ondřej Kysilka
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Denis A. Malyshev
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Kristýna Pluháčková
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Pavel Kočovský
- Department of Chemistry, Joseph Black Building, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
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33
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Higuchi K, Kawasaki T. Simple indole alkaloids and those with a nonrearranged monoterpenoid unit. Nat Prod Rep 2007; 24:843-68. [PMID: 17653362 DOI: 10.1039/b516351j] [Citation(s) in RCA: 239] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review covers the literature on simple indole alkaloids and those with a nonrearranged monoterpenoid unit. Newly isolated alkaloids, structure determinations, total syntheses and biological activities are included.
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Affiliation(s)
- Kazuhiro Higuchi
- Meiji Pharmaceutical University, 2-522-1 Kiyose, Tokyo 204-8588, Japan
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34
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35
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Cravotto G, Giovenzana GB, Palmisano G, Penoni A, Pilati T, Sisti M, Stazi F. Convolutamydine A: the first authenticated absolute configuration and enantioselective synthesis. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.11.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Mugishima T, Tsuda M, Kasai Y, Ishiyama H, Fukushi E, Kawabata J, Watanabe M, Akao K, Kobayashi J. Absolute stereochemistry of citrinadins a and B from marine-derived fungus. J Org Chem 2006; 70:9430-5. [PMID: 16268618 DOI: 10.1021/jo051499o] [Citation(s) in RCA: 175] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Structure: see text]. Citrinadin A (2) is a pentacyclic indolinone alkaloid isolated from the cultured broth of a fungus, Penicillium citrinum, which was separated from a marine red alga. The absolute stereochemistry of the pentacyclic core in 2 and its new congener, citrinadin B (1), was elucidated by analysis of the ROESY spectrum for the chlorohydrin derivative (3) of 1 as well as comparison of the electronic circular dichroism (ECD) spectra for 1 and 2 with those of known spirooxiindole alkaloids. On the other hand, the absolute configuration at C-21 bearing an epoxide ring was assigned as S by comparison of the vibrational circular dichroism (VCD) spectra of 1 with those of model compounds 2S- and 2R-2,3-epoxy-3,3-dimethyl-1-phenylpropan-1-one (4a and 4b, respectively).
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Affiliation(s)
- Takao Mugishima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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37
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Nakamura T, Shirokawa SI, Hosokawa S, Nakazaki A, Kobayashi S. Enantioselective Total Synthesis of Convolutamydines B and E. Org Lett 2006; 8:677-9. [PMID: 16468740 DOI: 10.1021/ol052871p] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The first enantioselective total synthesis of convolutamydines B and E has been achieved using our vinylogous Mukaiyama aldol reaction. The synthesis features highly diastereoselective vinylogous Mukaiyama aldol reaction with isatin instead of aldehydes to construct a chiral center of convolutamydines. Additionally, the absolute configuration of natural convolutamydine B has been determined as R by its CD spectrum.
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Affiliation(s)
- Tomoaki Nakamura
- Faculty of Pharmaceutical Sciences, Tokyo University of Science (RIKADAI), 2641 Yamazaki, Noda-shi, Chiba, 278-8510, Japan
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38
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Luppi G, Cozzi PG, Monari M, Kaptein B, Broxterman QB, Tomasini C. Dipeptide-Catalyzed Asymmetric Aldol Condensation of Acetone with (N-Alkylated) Isatins. J Org Chem 2005; 70:7418-21. [PMID: 16122267 DOI: 10.1021/jo050257l] [Citation(s) in RCA: 210] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The aldol condensation of acetone with several isatins is described. The desired compound was obtained in quantitative yield and with good enantioselectivities up to 77%. The best results were obtained with 10 mol % H-D-Pro-L-beta3-hPhg-OBn as a catalyst, resulting in the preferential formation of the (R)-enantiomer. The absolute configuration of the newly formed chiral center has been assigned by an X-ray diffraction study and CD spectra analysis of the molecules.
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Affiliation(s)
- Gianluigi Luppi
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
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39
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Kawasaki T, Nagaoka M, Satoh T, Okamoto A, Ukon R, Ogawa A. Synthesis of 3-hydroxyindolin-2-one alkaloids, (±)-donaxaridine and (±)-convolutamydines A and E, through enolization–Claisen rearrangement of 2-allyloxyindolin-3-ones. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.031] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Suzuki H, Morita H, Shiro M, Kobayashi J. Celogentin K, a new cyclic peptide from the seeds of Celosia argentea and X-ray structure of moroidin. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.01.053] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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Takayama H, Matsuda Y, Masubuchi K, Ishida A, Kitajima M, Aimi N. Isolation, structure elucidation, and total synthesis of two new Chimonanthus alkaloids, chimonamidine and chimonanthidine. Tetrahedron 2004. [DOI: 10.1016/j.tet.2003.11.034] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Takayama H, Fujiwara R, Kasai Y, Kitajima M, Aimi N. First asymmetric total synthesis of Us-7 and -8, novel D-seco Corynanthe-type oxindole alkaloids from Uncaria attenuata: structure revision of Us-7 and determination of absolute stereochemistry. Org Lett 2003; 5:2967-70. [PMID: 12889920 DOI: 10.1021/ol035128a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Starting from (S)-glycidol, the asymmetric total synthesis of novel D-seco Corynanthe-type oxindoles Us-7 and Us-8 was accomplished. The structure of Us-7 was revised from the reported structure 1 with the (3R,7S) form to structure 22 with (3S,7R), and the absolute stereochemistry at C15 of both alkaloids was established.
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Affiliation(s)
- Hiromitsu Takayama
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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43
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Monde K, Taniguchi T, Miura N, Nishimura SI, Harada N, Dukor RK, Nafie LA. Preparation of cruciferous phytoalexin related metabolites, (−)-dioxibrassinin and (−)-3-cyanomethyl-3-hydroxyoxindole, and determination of their absolute configurations by vibrational circular dichroism (VCD). Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01513-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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Patthy-Lukáts A, Beke G, Szabó LF, Podányi B. Investigation of the coupling reaction of tetraacetylsecologanin with oxotryptamine and its derivative. JOURNAL OF NATURAL PRODUCTS 2001; 64:1032-1039. [PMID: 11520221 DOI: 10.1021/np010153f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The coupling reaction of tetraacetylsecologanin with 2,3-dihydro-2-oxotryptamine and its N(b)-benzyl derivative was investigated. With the benzylated amine, the reaction was stopped at the tetracyclic ester level, and with the unsubstituted amine it was immediately followed by lactamization. In both cases, the products were formed with high stereoselectivity at C-3, but as an epimeric pair of 7R and 7S in a ratio of 1:3. The bulky benzyl substituent at N-4 directed the stereoselectivity at C-3 in favor of the S configuration. In the nonbenzylated compounds, the reversible coupling reaction is probably nonstereoselective, but in lactamization the 3R epimer is sterically favored and faster and gives the final lactam in this configuration. The formation of the spiro compounds may serve as a model reaction in the interpretation of the stereoselectivity of the coupling reaction of secologanin with tryptamine in the presence of strictosidine synthase.
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Affiliation(s)
- A Patthy-Lukáts
- Department of Organic Chemistry, Semmelweis University, Hogyes u. 7, H-1092 Budapest, Hungary
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46
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Kitajima M, Hashimoto KI, Yokoya M, Takayama H, Aimi N. Two New 19-Hydroxyursolic Acid-type Triterpenes from Peruvian ‘Uña de Gato’ ( Uncaria tomentosa ). Tetrahedron 2000. [DOI: 10.1016/s0040-4020(99)01048-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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Kitajima M, Hashimoto KI, Yokoya M, Takayama H, Aimi N. Two New 19-Hydroxyursolic Acid-type Triterpenes from Peruvian ‘Uña de Gato’ ( Uncaria tomentosa ). Tetrahedron 2000. [DOI: 10.1007/bf02483932] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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