1
|
Le TKD, Hioki Y, Duong TH, Kita M, Chavasiri W. Globunoids A-D, undescribed bichalconoid and biflavanoids with α-glucosidase and α-amylase inhibitory activities from Knema globularia stems. PHYTOCHEMISTRY 2024; 221:114066. [PMID: 38494085 DOI: 10.1016/j.phytochem.2024.114066] [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: 09/24/2023] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
A bichalconoid, globunoid A (1) and three biflavanones, globunoids B-D (2-4), previously undescribed, were isolated from the stems of Knema globularia, along with fourteen known analogues 5-18. The chemical structures of 1-4 were elucidated by the comprehensive spectroscopic analysis including UV, IR, HRESIMS, and NMR; the absolute configurations were determined based on their NOESY data, DP4+ statistical analysis, and ECD calculation. Up to now, compounds 2 and 3 represent the first 3,3″-linked biflavanone structures. Among the isolated compounds, 2, 3, and 2,3-dihydrocalodenin B (6) potently inhibited α-glucosidase and α-amylase activities, with IC50 values in the range 1.1-7.5 μM. Furthermore, the most active compound 6 was found to be a non-competitive inhibitor against these two enzymes.
Collapse
Affiliation(s)
- Thi-Kim-Dung Le
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
| | - Yusuke Hioki
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Masaki Kita
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Chulalongkorn University, Bangkok, 10330, Thailand.
| |
Collapse
|
2
|
Tanaka S, Yoshii Y, Hattori T. Lewis Acid-Mediated Friedel-Crafts-Type Formylation of Alkenes with Dichloromethyl Methyl Ether in the Presence of Pyridines. J Org Chem 2024; 89:3546-3551. [PMID: 38348870 DOI: 10.1021/acs.joc.3c02059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Various alkenes are formylated with dichloromethyl methyl ether (MOMCl2) by the combined use of SnCl4/2,6-dibromopyridine (B1) or AgOTf/pyridine (B4) via Friedel-Crafts-type reaction. The former reagent combination is mainly applied to α,α-diarylalkenes, while the latter one is applied not only to arylalkenes but also to some alkylalkenes. Vinyl aldehydes are exclusively obtained from alkenes that can possibly afford both allyl and vinyl aldehydes.
Collapse
Affiliation(s)
- Shinya Tanaka
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
- Environment Conservation Research Institute, Tohoku University, 6-6-04 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yuji Yoshii
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tetsutaro Hattori
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| |
Collapse
|
3
|
Kherudkar A, Bhattacharjee A, Nawkhare A, Mukherjee S, Pramanick S, Laha JK. Recent Advances On Direct Formylation Reactions. CHEM REC 2023; 23:e202300063. [PMID: 37229757 DOI: 10.1002/tcr.202300063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/09/2023] [Indexed: 05/27/2023]
Abstract
Aldehydes serve as the key functional group in organic synthesis and are valuable intermediates. The various advanced methods of direct formylation reactions have been reviewed in this article. Overcoming the drawbacks of the traditional methods of formylation, newer methods involving homo and heterogenous catalysts, one pot reactions, solvent free techniques are elaborated, which can be performed under mild conditions and using inexpensive resources.
Collapse
Affiliation(s)
- Aditya Kherudkar
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| | - Angana Bhattacharjee
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| | - Akash Nawkhare
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| | - Soumi Mukherjee
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| | - Sukhendu Pramanick
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| | - Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, 160062, Mohali, India
| |
Collapse
|
4
|
Saha S, Bhosle AA, Chatterjee A, Banerjee M. Mechanochemical Duff Reaction in Solid Phase for Easy Access to Mono- and Di-formyl Electron-Rich Arenes. J Org Chem 2023; 88:10002-10013. [PMID: 37418632 DOI: 10.1021/acs.joc.3c00789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2023]
Abstract
A sustainable alternative to the century-old Duff reaction was developed by adopting a solid-phase mechanochemical route. A series of mono-formyl electron-rich arenes were prepared in high yields in silica as the solid reaction media using a combination of hexamethylenetetramine (HMTA) as the formyl source and a small amount of H2SO4 in a mixer mill. The use of toxic, costly, and low-boiling trifluoroacetic acid was avoided in the new mold of the mechanochemical Duff reaction. The mono-formyl phenols were obtained with exclusive ortho-selectivity, whereas unprecedented para-formylation was observed for other electron-rich aromatics. By controlling the stoichiometry of HMTA, the method offers easy access to di-formylated phenols as well. The scalability of the reaction was validated with selected substrates at the gram-scale level. In a case study, a mechanochemical tandem reaction was explored in the synthesis of a rhodol derivative. The solvent-free, metal-free mild method of formylation, with the absence of tedious work-up steps and shorter reaction times using an inexpensive mineral acid, is a sustainable alternative to the available methods for aromatic formylation.
Collapse
Affiliation(s)
- Soumik Saha
- Department of Chemistry, BITS Pilani, K K Birla Goa Campus, NH 17B Bypass Road, Zuarinagar, Goa 403726, India
| | - Akhil A Bhosle
- Department of Chemistry, BITS Pilani, K K Birla Goa Campus, NH 17B Bypass Road, Zuarinagar, Goa 403726, India
| | - Amrita Chatterjee
- Department of Chemistry, BITS Pilani, K K Birla Goa Campus, NH 17B Bypass Road, Zuarinagar, Goa 403726, India
| | - Mainak Banerjee
- Department of Chemistry, BITS Pilani, K K Birla Goa Campus, NH 17B Bypass Road, Zuarinagar, Goa 403726, India
| |
Collapse
|
5
|
Hammoud F, Hijazi A, Duval S, Lalevée J, Dumur F. 5,12-Dihydroindolo[3,2-a]carbazole: A promising scaffold for the design of visible light photoinitiators of polymerization. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110880] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
6
|
Purgett TJ, Dyer MW, Bickel B, McNeely J, Porco JA. Gold(I)-Mediated Cycloisomerization/Cycloaddition Enables Bioinspired Syntheses of Neonectrolides B-E and Analogues. J Am Chem Soc 2019; 141:15135-15144. [PMID: 31469554 DOI: 10.1021/jacs.9b06355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Development of a synthetic route to the oxaphenalenone (OP) natural products neonectrolides B-E is described. The synthesis relies on gold-catalyzed 6-endo-dig hydroarylation of an unusual enynol substrate as well as a one-pot Rieche formylation/cyclization/deprotection sequence to efficiently construct the tricyclic oxaphenalenone framework in the form of a masked ortho-quinone methide (o-QM). A tandem cycloisomerization/[4 + 2] cycloaddition strategy was employed to quickly construct molecules resembling the neonectrolides. The tricyclic OP natural product SF226 could be converted to corymbiferan lactone E and a related masked o-QM. Our study culminates with the application of the tandem reaction sequence to syntheses of neonectrolides B-E as well as previously unreported exo-diastereomers.
Collapse
Affiliation(s)
- Thomas J Purgett
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Matthew W Dyer
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Bryce Bickel
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - James McNeely
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| |
Collapse
|
7
|
Kazin NA, Demina NS, Irgashev RA, Zhilina EF, Rusinov GL. Modifications of 5,12-dihydroindolo[3,2-a]carbazole scaffold via its regioselective C2,9-formylation and C2,9-acetylation. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.07.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Warashina T, Matsuura D, Kimura Y. Direct Formylation of Fluorine-Containing Aromatics with Dichloromethyl Alkyl Ethers. Chem Pharm Bull (Tokyo) 2019; 67:587-593. [DOI: 10.1248/cpb.c19-00176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
Reddy Nagireddy PK, Kommalapati VK, Manchukonda NK, Sridhar B, Tangutur AD, Kantevari S. Synthesis and Antiproliferative Activity of 9‐Formyl and 9‐Ethynyl Noscapines. ChemistrySelect 2019. [DOI: 10.1002/slct.201900666] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - Naresh K. Manchukonda
- Fluoro & Agrochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Balasubramanian Sridhar
- X-Ray crystallographyDepartment of Analytical ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
- Academy of Scientific and Innovative ResearchCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Anjana Devi Tangutur
- Department of Applied BiologyCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
- Academy of Scientific and Innovative ResearchCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Srinivas Kantevari
- Fluoro & Agrochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
- Academy of Scientific and Innovative ResearchCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| |
Collapse
|
10
|
Efficient preparation of dichloromethyl alkyl ethers and their application in the formylation of aromatic compounds: Scope and limitations. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
11
|
Schultze C, Schmidt B. Prenylcoumarins in One or Two Steps by a Microwave-Promoted Tandem Claisen Rearrangement/Wittig Olefination/Cyclization Sequence. J Org Chem 2018; 83:5210-5224. [DOI: 10.1021/acs.joc.8b00667] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Christiane Schultze
- Universitaet Potsdam, Institut fuer Chemie, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany
| | - Bernd Schmidt
- Universitaet Potsdam, Institut fuer Chemie, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany
| |
Collapse
|
12
|
Yang WR, Choi YS, Jeong JH. Efficient synthesis of polymethoxyselenoflavones via regioselective direct C-H arylation of selenochromones. Org Biomol Chem 2017; 15:3074-3083. [PMID: 28321447 DOI: 10.1039/c7ob00118e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substantial research has suggested that the configuration and the total number of functional groups on flavones influence their bioactivity. To investigate the changes in the biological activities of selenoflavones in relationship to structural changes, the development of a generally applicable synthetic method was a key. Until now, an efficient pathway for palladium-catalyzed direct arylation with the selenocyclic enone systems is not known in the literature. We herein introduce a simple direct C-H arylation of two difficult coupling partners, selenochromones and electron-rich aryl bromide, affording diverse polymethoxyselenoflavones with great efficiency and high selectivity.
Collapse
Affiliation(s)
- Woo-Ram Yang
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
| | - Yong-Sung Choi
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
| | - Jin-Hyun Jeong
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
| |
Collapse
|
13
|
Kamitanaka T, Morimoto K, Tsuboshima K, Koseki D, Takamuro H, Dohi T, Kita Y. Efficient Coupling Reaction of Quinone Monoacetal with Phenols Leading to Phenol Biaryls. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Tohru Kamitanaka
- Research Organization of Science and Technology; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Koji Morimoto
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Kohei Tsuboshima
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Daichi Koseki
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Hitoho Takamuro
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Toshifumi Dohi
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Yasuyuki Kita
- Research Organization of Science and Technology; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| |
Collapse
|
14
|
Kamitanaka T, Morimoto K, Tsuboshima K, Koseki D, Takamuro H, Dohi T, Kita Y. Efficient Coupling Reaction of Quinone Monoacetal with Phenols Leading to Phenol Biaryls. Angew Chem Int Ed Engl 2016; 55:15535-15538. [DOI: 10.1002/anie.201608013] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/02/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Tohru Kamitanaka
- Research Organization of Science and Technology; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Koji Morimoto
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Kohei Tsuboshima
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Daichi Koseki
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Hitoho Takamuro
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Toshifumi Dohi
- College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Yasuyuki Kita
- Research Organization of Science and Technology; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| |
Collapse
|
15
|
Wang W, Chen R, Luo Z, Wang W, Chen J. Two new benzoate derivatives and one new phenylacetate derivative from a marine-derived fungus Engyodontium album. Nat Prod Res 2016; 31:758-764. [PMID: 27750436 DOI: 10.1080/14786419.2016.1242002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Two new benzoate derivatives, ethyl 3,5-dimethoxy-2-propionylbenzoate (1) and ethyl 3,5-dihydroxy-2-propionylbenzoate (2), and one new phenylacetate derivative, ethyl 3,5-dimethoxy-2-propionylphenylacetate (3), together with 9 known compounds, were isolated from the fermentation of Engyodontium album derived from deep sea sediment. Their structures were elucidated by spectroscopic techniques, such as NMR, IR and HRESIMS. Compound 3 exhibited inhibitory activities against methicillin-resistant Staphylococcus aureus ATCC 43300 (MRSA) and Vibrio vulnificus, with MIC values of 7.8 and 15.6 μg/mL, respectively.
Collapse
Affiliation(s)
- Weiyi Wang
- a Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Third Institute of Oceanography, State Oceanic Administration , Xiamen , China.,b Key Laboratory of Urban Environment and Health , Institute of Urban Environment, Chinese Academy of Sciences , Xiamen , China
| | - Ruixuan Chen
- a Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Third Institute of Oceanography, State Oceanic Administration , Xiamen , China
| | - Zhuhua Luo
- a Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Third Institute of Oceanography, State Oceanic Administration , Xiamen , China
| | - Wei Wang
- a Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Third Institute of Oceanography, State Oceanic Administration , Xiamen , China
| | - Jianming Chen
- a Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources , Third Institute of Oceanography, State Oceanic Administration , Xiamen , China
| |
Collapse
|
16
|
Wang W, Chen R, Luo Z, Wang W, Chen J. Two new benzoate derivatives and one new phenylacetate derivative from a marine-derived fungus Engyodontium album. Nat Prod Res 2016. [DOI: 10.1080/14786419.2016.1242002 pmid: 27750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
Affiliation(s)
- Weiyi Wang
- Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
| | - Ruixuan Chen
- Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China
| | - Zhuhua Luo
- Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China
| | - Wei Wang
- Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China
| | - Jianming Chen
- Key Laboratory of Marine Biogenetic Resources, Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, China
| |
Collapse
|
17
|
Zaki MA, Nanayakkara NPD, Hetta MH, Jacob MR, Khan SI, Mohammed R, Ibrahim MA, Samoylenko V, Coleman C, Fronczek FR, Ferreira D, Muhammad I. Bioactive Formylated Flavonoids from Eugenia rigida: Isolation, Synthesis, and X-ray Crystallography. JOURNAL OF NATURAL PRODUCTS 2016; 79:2341-2349. [PMID: 27618204 DOI: 10.1021/acs.jnatprod.6b00474] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Two new flavonoids, rac-6-formyl-5,7-dihydroxyflavanone (1) and 2',6'-dihydroxy-4'-methoxy-3'-methylchalcone (2), together with five known derivatives, rac-8-formyl-5,7-dihydroxyflavanone (3), 4',6'-dihydroxy-2'-methoxy-3'-methyldihydrochalcone (4), rac-7-hydroxy-5-methoxy-6-methylflavanone (5), 3'-formyl-2',4',6'-trihydroxy-5'-methyldihydrochalcone (6), and 3'-formyl-2',4',6'-trihydroxydihydrochalcone (7), were isolated from the leaves of Eugenia rigida. The individual (S)- and (R)-enantiomers of 1 and 3, together with the corresponding formylated flavones 8 (6-formyl-5,7-dihydroxyflavone) and 9 (8-formyl-5,7-dihydroxyflavone), as well as 2',4',6'-trihydroxychalcone (10), 3'-formyl-2',4',6'-trihydroxychalcone (11), and the corresponding 3'-formyl-2',4',6'-trihydroxydihydrochalcone (7) and 2',4',6'-trihydroxydihydrochalcone (12), were synthesized. The structures of the isolated and synthetic compounds were established via NMR, HRESIMS, and electronic circular dichroism data. In addition, the structures of 3, 5, and 8 were confirmed by single-crystal X-ray diffraction crystallography. The isolated and synthetic flavonoids were evaluated for their antimicrobial and cytotoxic activities against a panel of microorganisms and solid tumor cell lines.
Collapse
Affiliation(s)
- Mohamed A Zaki
- Department of Pharmacognosy, School of Pharmacy, Beni-Suef University , Beni-Suef, Egypt
| | | | - Mona H Hetta
- Department of Pharmacognosy, School of Pharmacy, Beni-Suef University , Beni-Suef, Egypt
| | | | | | - Rabab Mohammed
- Department of Pharmacognosy, School of Pharmacy, Beni-Suef University , Beni-Suef, Egypt
| | | | | | | | - Frank R Fronczek
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803-1804, United States
| | | | | |
Collapse
|