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Li LX, Min L, Yao TB, Ji SX, Qiao C, Tian PL, Sun J, Li CC. Total Synthesis of Yuzurine-type Alkaloid Daphgraciline. J Am Chem Soc 2022; 144:18823-18828. [PMID: 36198113 DOI: 10.1021/jacs.2c09548] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of daphgraciline has been achieved, which also represents the first example of the synthesis of Daphniphyllum yuzurine-type alkaloids (∼50 members). The unique bridged azabicyclo[4.3.1] ring system in the yuzurine-type subfamily was efficiently and diastereoselectively assembled via a mild type II [5+2] cycloaddition for the first time. The compact tetracyclic [6-7-5-5] skeleton was installed efficiently via an intramolecular Diels-Alder reaction, followed by a benzilic acid-type rearrangement. The synthetically challenging spiro tetrahydropyran moiety in the final product was installed diastereoselectively via a TiIII-mediated reductive epoxide coupling reaction. Potential access to enantioenriched daphgraciline is presented.
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Affiliation(s)
- Li-Xuan Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Long Min
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tian-Bing Yao
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shu-Xiao Ji
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang Qiao
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Pei-Lin Tian
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Shenzhen Bay Laboratory, Shenzhen 518132, China
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2
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Tu J, Ripa RA, Kelley SP, Harmata M. Intramolecular (4+3) Cycloadditions of Oxidopyridinium Ions: Towards Daphnicyclidin A. Chemistry 2022; 28:e202200370. [PMID: 35612968 DOI: 10.1002/chem.202200370] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Indexed: 12/15/2022]
Abstract
N-alkylation of 5-hydroxynicotinic acid esters with electrophiles containing diene functionality produces salts that undergo intramolecular (4+3) cycloaddition reactions upon heating in the presence of base. Initial studies used a three-carbon tether to join the pyridinium ion and diene, revealing some aspects of the inherent selectivity of the reaction with such substrates. Much more challenging was the synthesis of related species possessing only a two-carbon tether. Nevertheless, the cycloaddition of such compounds was successful, leading directly to the ABC ring system of the alkaloid daphnicyclidin A.
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Affiliation(s)
- Jianzhuo Tu
- Department of Chemistry, University of Missouri-Columbia, 601 S. College Avenue, Columbia, Missouri, 65211, USA
| | - Rawshan A Ripa
- Department of Chemistry, University of Missouri-Columbia, 601 S. College Avenue, Columbia, Missouri, 65211, USA
| | - Steven P Kelley
- Department of Chemistry, University of Missouri-Columbia, 601 S. College Avenue, Columbia, Missouri, 65211, USA
| | - Michael Harmata
- Department of Chemistry, University of Missouri-Columbia, 601 S. College Avenue, Columbia, Missouri, 65211, USA
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3
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Tu J, Clark MM, Harmata M. First synthesis of an ABCE ring substructure of daphnicyclidin A. Org Biomol Chem 2022; 20:6547-6549. [DOI: 10.1039/d2ob01246d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ABCE tetracyclic ring system of daphnicyclidin A was prepared using an intramolecular (4 + 3) cycloaddition of an oxidopyridinium ion as the key step.
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Affiliation(s)
- Jianzhuo Tu
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Madison M. Clark
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Michael Harmata
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
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4
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Yang J, Liu X, Fu J, Lyu HY, Bai LP, Jiang ZH, Zhu GY. Calycindaphines A–J, Daphniphyllum alkaloids from the roots of Daphniphyllum calycinum. RSC Adv 2021; 11:9057-9066. [PMID: 35423413 PMCID: PMC8695325 DOI: 10.1039/d1ra00107h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/22/2021] [Indexed: 12/01/2022] Open
Abstract
Ten new Daphniphyllum alkaloids, calycindaphines A–J (1–10), together with seventeen known alkaloids were isolated from the roots of Daphniphyllum calycinum. Their structures were established by extensive spectroscopic methods and compared with data from literature. Compound 1 is a novel alkaloid with a new rearrangement C22 skeleton with the 5/8/7/5/5 ring system. Compound 2 represents the second example of calyciphylline G-type alkaloids. Compound 10 is the first example of secodaphniphylline-type alkaloid absent of the oxygen-bridge between C-25/C-29. The possible biogenetic pathways of 1 and 2 were also proposed. All the isolated compounds were evaluated for their bioactivities in three cell models. Compounds 22, 23, and 26 showed significant NF-κB transcriptional inhibitory activity at a concentration of 50 μM. Compounds 16 and 18 exhibited significant TGF-β inhibitory activity in HepG2 cells. Compounds 24 and 26 induced autophagic puncta and mediated the autophagic marker LC3-II conversion in HEK293 cells. Ten new Daphniphyllum alkaloids, calycindaphines A–J (1–10), were isolated from Daphniphyllum calycinum. Compound 1 possesses a unique C22 skeleton with the 5/8/7/5/5 ring system and might be a key intermediate for daphhimalenine A formation.![]()
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Affiliation(s)
- Ji Yang
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Xin Liu
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Jing Fu
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Hao-Yuan Lyu
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Li-Ping Bai
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Zhi-Hong Jiang
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
| | - Guo-Yuan Zhu
- State Key Laboratory of Quality Research in Chinese Medicine
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease
- Macau Institute for Applied Research in Medicine and Health
- Macau University of Science and Technology
- People's Republic of China
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5
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Abstract
The triterpenoids Daphniphyllum alkaloids share the unique fused hexacyclic ring framework are isolated from the genus Daphniphyllum. These natural products possess comprehensive biological activities and exhibit excellent potential medicinal appliment. This review covers the reported isolation studies and biological activities of Daphniphyllum alkaloids spanning the period from 1966 to the beginning of 2020, In the meantime, the total synthesis of Daphniphyllum alkaloids will be emphatically summarized for supplement over this review series.
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6
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-type Alkaloids: Evolution of a Synthetic Strategy to (−)-Daphlongamine H. J Org Chem 2019; 84:14069-14091. [DOI: 10.1021/acs.joc.9b02223] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cedric L. Hugelshofer
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Vignesh Palani
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
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7
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Nakamura H, Kawakami M, Tsukano C, Takemoto Y. Concise Construction of the ACDE Ring System of Calyciphylline A Type Alkaloids by a [5+2] Cycloaddition. Chemistry 2019; 25:8701-8704. [PMID: 31063603 DOI: 10.1002/chem.201901690] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 12/27/2022]
Abstract
A concise route for construction of the ACDE ring skeleton in calyciphylline A type alkaloids was developed using an intramolecular [5+2] cycloaddition reaction of an oxidopyrylium species bearing a tetrasubstituted olefin. Key to the success of this reaction was the combination of acid and base, which accelerated the construction of this skeleton containing a spiro ring and vicinal quaternary carbon centers. The resultant tricyclic ADE ring compound was converted to an ACDE ring model through C-H oxidation and an aza-Wittig reaction.
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Affiliation(s)
- Hugh Nakamura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Manami Kawakami
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Chihiro Tsukano
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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8
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-Type Alkaloids: Total Syntheses of (-)-Daphlongamine H and (-)-Isodaphlongamine H. J Am Chem Soc 2019; 141:8431-8435. [PMID: 31074980 DOI: 10.1021/jacs.9b03576] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first total synthesis of the complex hexacylic Daphniphyllum alkaloid (-)-daphlongamine H has been accomplished. Key to the success of the strategy are a complexity-building Mannich reaction, efficient cyclizations, and a highly diastereoselective hydrogenation to assemble multigram quantities of the tricyclic core bearing four contiguous stereocenters. Following construction of the hydro-indene substructure by means of a Pauson-Khand reaction, endgame redox manipulations delivered the natural product. Importantly, the synthetic studies have also given access to (-)-isodaphlongamine H and led to a revision of the reported structure of deoxyisocalyciphylline B.
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Affiliation(s)
- Cedric L Hugelshofer
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Vignesh Palani
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Richmond Sarpong
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
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9
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10
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Li JL, Shi HW, Wang Q, Chai YH, Yang J. Synthesis of the ABC Tricyclic System of Daphnicyclidin A. Org Lett 2017; 19:1497-1499. [PMID: 28296406 DOI: 10.1021/acs.orglett.7b00230] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian Long Li
- Innovative Research Center
of Medicine, Key laboratory of Macromolecular Science of Shaanxi Province,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Chang’an Campus: No. 620, West Chang’an
Avenue, Chang’an District, Xi’an 710119, China
| | - Hong Wei Shi
- Innovative Research Center
of Medicine, Key laboratory of Macromolecular Science of Shaanxi Province,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Chang’an Campus: No. 620, West Chang’an
Avenue, Chang’an District, Xi’an 710119, China
| | - Qi Wang
- Innovative Research Center
of Medicine, Key laboratory of Macromolecular Science of Shaanxi Province,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Chang’an Campus: No. 620, West Chang’an
Avenue, Chang’an District, Xi’an 710119, China
| | - Yong Hai Chai
- Innovative Research Center
of Medicine, Key laboratory of Macromolecular Science of Shaanxi Province,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Chang’an Campus: No. 620, West Chang’an
Avenue, Chang’an District, Xi’an 710119, China
| | - Jun Yang
- Innovative Research Center
of Medicine, Key laboratory of Macromolecular Science of Shaanxi Province,
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Chang’an Campus: No. 620, West Chang’an
Avenue, Chang’an District, Xi’an 710119, China
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11
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Chattopadhyay AK, Hanessian S. Recent Progress in the Chemistry of Daphniphyllum Alkaloids †. Chem Rev 2017; 117:4104-4146. [PMID: 28205435 DOI: 10.1021/acs.chemrev.6b00412] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Daphniphyllum is an evergreen species known since 1826. After initial systematic investigations, more than 320 members of this family have been isolated, which comprise complex and fascinating structures. Unique azapolycyclic architectures containing one or more quaternary stereocenters render these alkaloids synthetically challenging. This review covers efforts toward the synthesis of Daphniphyllum alkaloids spanning the period from 2005 to the beginning of 2016, including reported biological activities as well as the isolation of new members of this genus.
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Affiliation(s)
- Amit Kumar Chattopadhyay
- Department of Chemistry, Université de Montréal , Post Office Box 6128, Station Centre Ville, Montreal, Quebec H3C 3J7, Canada
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal , Post Office Box 6128, Station Centre Ville, Montreal, Quebec H3C 3J7, Canada
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12
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Chattopadhyay AK, Berger G, Hanessian S. Strategies toward the Total Synthesis of Calyciphylline B-type Alkaloids: A Computational Perspective Aided by DFT Analysis. J Org Chem 2016; 81:5074-86. [PMID: 27251014 DOI: 10.1021/acs.joc.6b00638] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we describe synthetic efforts toward the total synthesis of calyciphylline B-type alkaloids. In the process, we disclose a detailed DFT study of equilibrium geometries and transition states that explains the stereochemical outcome during the formation of critical intermediates. X-ray crystallographic analysis reveals interesting conformational features in the naturally occurring deoxycalyciphylline B and its synthetic congeners.
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Affiliation(s)
- Amit Kumar Chattopadhyay
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
| | - Gilles Berger
- Laboratoire de Chimie Pharmaceutique Organique, Campus Plaine CP205/5, Université Libre de Bruxelles , Boulevard du Triomphe, 1050 Brussels, Belgium
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
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13
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Chattopadhyay AK, Menz H, Ly VL, Dorich S, Hanessian S. Synthesis of a Model Tetracyclic Core Structure of Calyciphylline B-Type Alkaloids. J Org Chem 2016; 81:2182-8. [PMID: 26878089 DOI: 10.1021/acs.joc.5b02875] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report the enantioselective synthesis of a functionalized aza-octahydropentalene and its elaboration to a model tetracyclic core structure of calyciphylline B-type alkaloids.
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Affiliation(s)
- Amit Kumar Chattopadhyay
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, QC, H3C 3J7, Canada
| | - Helge Menz
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, QC, H3C 3J7, Canada
| | - Vu Linh Ly
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, QC, H3C 3J7, Canada
| | - Stéphane Dorich
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, QC, H3C 3J7, Canada
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal , Station Centre Ville, C.P. 6128, Montreal, QC, H3C 3J7, Canada
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14
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Zhang H, Zhang DD, Li JY, Shyaula SL, Li J, Yue JM. New alkaloids from Daphniphyllum himalense. RSC Adv 2016. [DOI: 10.1039/c6ra06420e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series ofDaphniphyllumalkaloids with selective kinase inhibitory activity were isolated and structurally characterized fromDaphniphyllum himalense.
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Affiliation(s)
- Hua Zhang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | - Dong-Dong Zhang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | - Jing-Ya Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | | | - Jia Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
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15
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Williams DR, Mondal PK, Bawel SA, Nag PP. Stereocontrolled Synthesis of the Tricyclic ABC Ring System of Daphnicyclidin A. Org Lett 2014; 16:1956-9. [DOI: 10.1021/ol5005092] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- David R. Williams
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Prolay K. Mondal
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Seth A. Bawel
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Partha P. Nag
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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16
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Kang B, Jakubec P, Dixon DJ. Strategies towards the synthesis of calyciphylline A-type Daphniphyllum alkaloids. Nat Prod Rep 2014; 31:550-62. [PMID: 24595901 DOI: 10.1039/c3np70115h] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Daphniphyllum alkaloids are a diverse family of natural products rich in number and structural diversity that have been known for many decades. However, the structurally unique subclass of calyciphylline A-type alkaloids has only recently been discovered and is relatively unexplored. Several noteworthy core syntheses and the development of a wide range of novel synthetic strategies have been achieved. This includes strategies based on intramolecular Michael addition, Pd-catalysis, cycloaddition, and Mannich-type reactions. This review will provide an overview of these synthetic studies.
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Affiliation(s)
- Baldip Kang
- The Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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17
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Wang F, Mao MF, Wei GZ, Gao Y, Ren FC, Liu JK. Hybridaphniphyllines A and B, Daphniphyllum alkaloid and iridoid hybrids suggestive of Diels-Alder cycloaddition in Daphniphyllum longeracemosum. PHYTOCHEMISTRY 2013; 95:428-35. [PMID: 23906551 DOI: 10.1016/j.phytochem.2013.07.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 06/19/2013] [Accepted: 07/08/2013] [Indexed: 05/22/2023]
Abstract
Two Daphniphyllum alkaloid and iridoid hybrids with the hitherto unknown decacyclic fused skeletons, hybridaphniphyllines A and B, along with one diamino Daphniphyllum alkaloid, daphnicyclidin I, were isolated from dried stems and leaves of Daphniphyllum longeracemosum. Their structures were elucidated on the basis of extensive spectroscopic analysis, and the absolute configuration of daphnicyclidin I was deduced by the CD exciton chirality method. A biogenetic pathway for 1 and 2 involving natural Diels-Alder cycloaddition is proposed.
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Affiliation(s)
- Fei Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; BioBioPha Co., Ltd., 132 Lanhei Road, Kunming 650201, China.
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18
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Zhang CR, Liu HB, Dong SH, Wu Y, Yue JM. Alkaloids from the Twigs and Leaves ofDaphniphyllum macropodum. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Yang M, Wang L, He ZH, Wang SH, Zhang SY, Tu YQ, Zhang FM. Tandem Semipinacol-Type 1,2-Carbon Migration/Aldol Reaction toward the Construction of [5–6–7] All-Carbon Tricyclic Core of Calyciphylline A-Type Alkaloids. Org Lett 2012; 14:5114-7. [DOI: 10.1021/ol302386g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming Yang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Lin Wang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zheng-He He
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shao-Hua Wang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shu-Yu Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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20
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Discovery of structurally diverse and bioactive compounds from plant resources in China. Acta Pharmacol Sin 2012; 33:1147-58. [PMID: 22941284 DOI: 10.1038/aps.2012.105] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
This review describes the major discoveries of structurally diverse and/or biologically significant compounds from plant resources in China, mainly from the traditional Chinese medicines (TCMs) since the establishment of our research group in 1999. In the past decade, a large array of biologically significant and novel structures has been identified from plant resources (or TCM) in our laboratory. The structural modification of several biologically important compounds led to more than 400 derivatives, some of which exhibited significantly improved activities and provided opportunities to elucidate the structure-activity relationship of the related compound class. These findings are important for drug discovery and help us understand the biological basis for the traditional applications of these plants in TCM.
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21
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Xu C, Wang L, Hao X, Wang DZ. Tackling Reactivity and Selectivity within a Strained Architecture: Construction of the [6–6–5–7] Tetracyclic Core of Calyciphylline Alkaloids. J Org Chem 2012; 77:6307-13. [DOI: 10.1021/jo300776d] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen Xu
- Laboratory of Chemical Genomics, School of
Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town,
Nanshan District, Shenzhen 518055, China
| | - Lu Wang
- Laboratory of Chemical Genomics, School of
Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town,
Nanshan District, Shenzhen 518055, China
| | - Xiaojiang Hao
- Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
| | - David Zhigang Wang
- Laboratory of Chemical Genomics, School of
Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town,
Nanshan District, Shenzhen 518055, China
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22
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Sladojevich F, Michaelides IN, Darses B, Ward JW, Dixon DJ. Expedient Route to the Functionalized Calyciphylline A-Type Skeleton via a Michael Addition–RCM Strategy. Org Lett 2011; 13:5132-5. [DOI: 10.1021/ol202000w] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Filippo Sladojevich
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA,
U.K., and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Iacovos N. Michaelides
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA,
U.K., and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Benjamin Darses
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA,
U.K., and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - John W. Ward
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA,
U.K., and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Darren J. Dixon
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA,
U.K., and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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23
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Yang TQ, Di YT, He HP, Zhang Q, Zhang Y, Hao XJ. Further Alkaloids from the Fruits of Daphniphyllum longeracemosum. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201000170] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Xu C, Liu Z, Wang H, Zhang B, Xiang Z, Hao X, Wang DZ. Rapid Construction of [5−6−7] Tricyclic Ring Skeleton of Calyciphylline Alkaloid Daphnilongeranin B. Org Lett 2011; 13:1812-5. [DOI: 10.1021/ol200312q] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen Xu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - Zheng Liu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - Huifei Wang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - Bo Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - Zheng Xiang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - Xiaojiang Hao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
| | - David Zhigang Wang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen University Town, Nanshan District, Shenzhen, China 518055, and Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China 650204
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25
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Zhang CR, Liu HB, Dong SH, Zhu JY, Wu Y, Yue JM. Calycinumines A and B, Two Novel Alkaloids from Daphniphyllum calycinum. Org Lett 2009; 11:4692-5. [DOI: 10.1021/ol9019919] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuan-Rui Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Hong-Bing Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Shi-Hui Dong
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Jian-Yong Zhu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Yan Wu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
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26
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Zhang CR, Liu HB, Feng T, Zhu JY, Geng MY, Yue JM. Alkaloids from the leaves of Daphniphyllum subverticillatum. JOURNAL OF NATURAL PRODUCTS 2009; 72:1669-1672. [PMID: 19739650 DOI: 10.1021/np9003799] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Four new alkaloids, 17-hydroxydaphnigraciline (1), subdaphnidine A (2), daphnezomine L methyl ester (3), and 11-hydroxycodaphniphylline (4), along with 24 known analogues, were isolated from the leaves of Daphniphyllum subverticillatum. The structures of 1-4 were elucidated on the basis of spectroscopic methods and from chemical evidence. Daphnilongeridine (5) showed cytotoxicity against several tumor cell lines at IC(50) values in the range 2.4-9.7 microM and against the HMEC human microvascular endothelial cell line with an IC(50) of 2.7 microM.
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Affiliation(s)
- Chuan-Rui Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, People's Republic of China
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27
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Li CS, Di YT, Zhang Q, Zhang Y, Tan CJ, Hao XJ. Alkaloids from the Leaves ofDaphniphyllum longeracemosumRosenth. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800358] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Zhang Y, Di YT, Liu HY, Li CS, Tan CJ, Zhang Q, Fang X, Li SL, Hao XJ. Three New Alkaloids, Paxiphyllines C - E, fromDaphniphyllum paxianum. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890232] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Zhang CR, Yang SP, Yue JM. Alkaloids from the twigs of Daphniphyllum calycinum. JOURNAL OF NATURAL PRODUCTS 2008; 71:1663-1668. [PMID: 18811206 DOI: 10.1021/np800323m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Twelve new alkaloids, caldaphnidines G-R (1-12), along with 24 known ones, were isolated from the twigs of Daphniphyllum calycinum. Their structures were elucidated by spectroscopic methods, especially two-dimensional NMR techniques.
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Affiliation(s)
- Chuan-Rui Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, People's Republic of China
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31
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Li CS, Di YT, Mu SZ, He HP, Zhang Q, Fang X, Zhang Y, Li SL, Lu Y, Gong YQ, Hao XJ. Daphniphyllum and diterpenoid alkaloids from Daphniphyllum longeracemosum. JOURNAL OF NATURAL PRODUCTS 2008; 71:1202-1206. [PMID: 18553922 DOI: 10.1021/np8001332] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Four new Daphniphyllum alkaloids, daphlongamines A-D (1-4), were isolated from the fruits of Daphniphyllum longeracemosum. Their structures were characterized by spectroscopic methods, especially 2D NMR techniques. A single-crystal X-ray diffraction analysis was used to confirm the stereochemistry of 3. Remarkably, this is the first report of aconitine- and veatchine-type diterpenoid alkaloids from the genus Daphniphyllum.
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Affiliation(s)
- Chun-Shun Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
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32
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Mu SZ, Wang JS, Yang XS, He HP, Li CS, Di YT, Wang Y, Zhang Y, Fang X, Huang LJ, Hao XJ. Alkaloids from Daphniphyllum oldhami. JOURNAL OF NATURAL PRODUCTS 2008; 71:564-569. [PMID: 18288811 DOI: 10.1021/np070512s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Four new Daphniphyllum alkaloids, daphnioldhanines H-K ( 1- 4), along with 34 known alkaloids, were isolated from Daphniphyllum oldhami. The known alkaloid dehydrodaphnigraciline ( 5) is now reported as a natural product. Their structures were elucidated by spectroscopic methods, especially 2D NMR techniques. The effects against platelet aggregation of compounds 1, 3, and 5 were evaluated, and 3 showed stronger activity against platelet aggregation induced by PAF. This is the first report of quinolizidine alkaloids from the genus Daphniphyllum.
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Affiliation(s)
- Shu-Zhen Mu
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Guiyang 550002, People's Republic of China
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33
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34
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Wang XN, Gan LS, Fan CQ, Yin S, Yue JM. Alkaloids from the Fruits ofDaphniphyllum macropodum. Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790222] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Mu SZ, Li CS, He HP, Di YT, Wang Y, Wang YH, Zhang Z, Lü Y, Zhang L, Hao XJ. Daphnipaxianines A-D, alkaloids from Daphniphyllum paxianum. JOURNAL OF NATURAL PRODUCTS 2007; 70:1628-31. [PMID: 17887722 DOI: 10.1021/np070342j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Four new Daphniphyllum alkaloids, daphnipaxianines A-D ( 1- 4), along with six known ones, have been isolated from the leaves and fruits of Daphniphyllum paxianum. Daphnipaxianines A and B ( 1, 2), a pair of epimers differing at C-10, are the first caliciphylline A type Daphniphyllum alkaloids with a Delta (9(15))-unsaturated cyclic ketone unit, and daphnipaxianine D ( 4) is the first yuzurine-type Daphniphyllum alkaloid containing a hexacyclic ring system. The structures of these alkaloids were characterized by spectroscopic methods, especially 2D NMR techniques. A single-crystal X-ray diffraction analysis was used to confirm the structure of 1.
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MESH Headings
- Alkaloids/chemistry
- Alkaloids/isolation & purification
- Alkaloids/pharmacology
- Crystallography, X-Ray
- Drug Screening Assays, Antitumor
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/pharmacology
- Heterocyclic Compounds, 4 or More Rings/chemistry
- Heterocyclic Compounds, 4 or More Rings/isolation & purification
- Heterocyclic Compounds, 4 or More Rings/pharmacology
- Humans
- Molecular Conformation
- Molecular Structure
- Nuclear Magnetic Resonance, Biomolecular
- Plant Leaves/chemistry
- Plants, Medicinal/chemistry
- Saxifragaceae/chemistry
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Affiliation(s)
- Shu-Zhen Mu
- Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
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36
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Saito S, Kubota T, Kobayashi J. Calyciphyllines E and F, novel hepta- and pentacyclic alkaloids from Daphniphyllum calycinum. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.156] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Kong NC, He HP, Wang YH, Gao S, Di YT, Hao XJ. Two New Iridoid Alkaloids, Daphmacropodosidines A and B, fromDaphniphyllum macropodum. Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790100] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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39
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Mu SZ, Yang XW, Di YT, He HP, Wang Y, Wang YH, Li L, Hao XJ. Secophnane-type alkaloids from Daphniphyllum oldhami. Chem Biodivers 2007; 4:129-38. [PMID: 17311225 DOI: 10.1002/cbdv.200790017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Four new alkaloids, daphnioldhanins D-G (1-4, resp.), together with five known alkaloids, daphmacropodine (5), secodaphniphylline (6), deoxycalyciphylline B (7), deoxyisocalyciphylline B (8), and daphmanidin A (9), were isolated from the roots of Daphniphyllum oldhami. Their structures were elucidated on the basis of spectroscopic data and chemical methods. Compound 1 at 2.0 microM showed potent antioxidant activity against H(2)O(2)-induced impairment in PC12 cells.
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Affiliation(s)
- Shu-Zhen Mu
- The Key Laboratory of Chemistry for Natural Product of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
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40
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Gan XW, Bai HY, Chen QG, Ma L, Hu LH. A zwitterionic alkaloid, containing a rare cyclopentadienyl anion unit, from the stem barks of Daphniphyllum macropodum Miq. Chem Biodivers 2007; 3:1255-9. [PMID: 17193239 DOI: 10.1002/cbdv.200690127] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A new Daphniphyllum alkaloid daphnicyclidin L (1), containing a rare cyclopentadienyl anion, which is stabilized as a zwitterion by an internal iminium counterion, was isolated from the stem barks of Daphniphyllum macropodum Miq., together with four known alkaloids: daphnicyclidin D (2), daphnicyclidin H (3), deoxyyuzurimine (4), and yuzurimine (5). The structures were elucidated on the basis of spectroscopic data. The configuration of 1 was elucidated by single-crystal X-ray diffraction crystallography.
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Affiliation(s)
- Xian-Wen Gan
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, P.R. China
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41
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42
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Li L, He HP, Di YT, Gao S, Hao XJ. Daphnilongerine, an unprecedented fused pentacyclic ring system alkaloid from Daphniphyllum longeracemosum Rosenth. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.06.144] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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43
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Li L, He HP, Di YT, Tian JM, Hao XJ. New Alkaloids fromDaphniphyllum longeracemosumRosenth. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690146] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Zhang W, Guo YW, Krohn K. Macropodumines A–C: Novel Pentacyclic Alkaloids with an Unusual Skeleton or Zwitterion Moiety fromDaphniphyllum macropodum Miq. Chemistry 2006; 12:5122-7. [PMID: 16642529 DOI: 10.1002/chem.200600056] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Three novel alkaloids, macropodumines A-C (1-3), were isolated from the stem of Daphniphyllum macropodum Miq. Interestingly, the structure of macropodumine A (1) was characterized as having a fused pentacyclic system including an unusual eleven-membered macrolactone ring, whereas macropodumine B (2) contains a rare cyclopentadienyl carbanion, which is stabilized as a zwitterion by an internal iminium cation. The structures of these new metabolites were established on the basis of their detailed spectroscopic analysis. In particular, the unique structure of zwitterion 2 was further confirmed by using single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Wen Zhang
- State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 201203, P.R. China
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