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Ando Y, Ogawa D, Ohmori K, Suzuki K. Enantioselective Total Syntheses of Preussomerins: Control of Spiroacetal Stereogenicity by Photochemical Reaction of a Naphthoquinone through 1,6-Hydrogen Atom Transfer. Angew Chem Int Ed Engl 2023; 62:e202213682. [PMID: 36446739 PMCID: PMC10107447 DOI: 10.1002/anie.202213682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/16/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022]
Abstract
We report the enantioselective total syntheses of preussomerins EG1 , EG2 , and EG3 . The key transformation is a stereospecific photochemical reaction involving 1,6-hydrogen atom transfer to achieve retentive replacement of a C-H with a C-O bond, enabling otherwise-difficult control of the spiroacetal stereogenic center.
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Affiliation(s)
- Yoshio Ando
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Daichi Ogawa
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Ken Ohmori
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Keisuke Suzuki
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
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2
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Walsh MP, Barclay JA, Begg CS, Xuan J, Johnson NT, Cole JC, Kitching MO. Identifying a Hidden Conglomerate Chiral Pool in the CSD. JACS AU 2022; 2:2235-2250. [PMID: 36311827 PMCID: PMC9597607 DOI: 10.1021/jacsau.2c00394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
Conglomerate crystallization is the spontaneous generation of individually enantioenriched crystals from a nonenantioenriched material. This behavior is responsible for spontaneous resolution and the discovery of molecular chirality by Pasteur. The phenomenon of conglomerate crystallization of chiral organic molecules has been left largely undocumented, with no actively curated list available in the literature. While other crystallographic behaviors can be interrogated by automated searching, conglomerate crystallizations are not identified within the Cambridge Structural Database (CSD) and are therefore not accessible by conventional automated searching. By conducting a manual search of the CSD and literature, a list of over 1800 chiral species capable of conglomerate crystallization was curated by inspection of the racemic synthetic routes described in each publication. The majority of chiral conglomerate crystals are produced and published by synthetic chemists who seldom note and rarely exploit the implications this phenomenon can have on the enantiopurity of their crystalline materials. With their structures revealed, we propose that this list of compounds represents a new chiral pool which is not tied to biological sources of chirality.
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Affiliation(s)
- Mark P. Walsh
- Department
of Chemistry Durham University, Lower Mount Joy, South Rd, DurhamDH1 3LE, United
Kingdom
| | - James A. Barclay
- Department
of Chemistry Durham University, Lower Mount Joy, South Rd, DurhamDH1 3LE, United
Kingdom
| | - Callum S. Begg
- Department
of Chemistry Durham University, Lower Mount Joy, South Rd, DurhamDH1 3LE, United
Kingdom
| | - Jinyi Xuan
- Department
of Chemistry Durham University, Lower Mount Joy, South Rd, DurhamDH1 3LE, United
Kingdom
| | - Natalie T. Johnson
- Cambridge
Crystallographic Data Centre, 12 Union Road, CambridgeCB2 1EZ, United Kingdom
| | - Jason C. Cole
- Cambridge
Crystallographic Data Centre, 12 Union Road, CambridgeCB2 1EZ, United Kingdom
| | - Matthew O. Kitching
- Department
of Chemistry Durham University, Lower Mount Joy, South Rd, DurhamDH1 3LE, United
Kingdom
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3
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Xu L, Ma H, An X, Li Y, Zhang Q, Liu X, Wang M. Total synthesis, structure revision and cytotoxic activity of Sch 53825 and its derivatives. RSC Adv 2022; 12:17629-17636. [PMID: 35765427 PMCID: PMC9194939 DOI: 10.1039/d2ra02898k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 06/01/2022] [Indexed: 11/25/2022] Open
Abstract
The first total synthesis of Sch 53825 (14) was achieved in 12 steps from 5-hydroxy-1-tetralone in 16% overall yield through N-benzyl cinchoninium chloride-catalyzed asymmetric epoxidation and a Mitsunobu reaction as the key steps. On this basis, the synthesis of palmarumycin B6 was improved using the same raw material with 6 steps and 32% overall yield. Also, three new analogues with two chlorine atoms were synthesized. Their structures were characterized by 1H, 13C NMR, HR-ESI-MS and X-ray diffraction data. The structure of natural Sch 53825 was revised as an epimer of compound 1 with the anti-hydroxy epoxide at C-4. Their cytotoxic activities against several tumor cell lines (HCT116, U251, BGC823, Huh-7 and PC9) showed that compound 11 exhibited excellent cytotoxicity against above mentioned cancer cell lines with IC50 < 0.5 μM. The first total synthesis of Sch 53825 (14) was achieved in 12 steps from 5-hydroxy-1-tetralone in 16% overall yield through N-benzyl cinchoninium chloride-catalyzed asymmetric epoxidation and a Mitsunobu reaction as the key steps.![]()
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Affiliation(s)
- Leichuan Xu
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Haoyun Ma
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Xinkun An
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Yihao Li
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Qian Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Xinlei Liu
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
| | - Mingan Wang
- Department of Applied Chemistry, College of Science, China Agricultural University Beijing 100193 People's Republic of China
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4
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Perspective: Reflections on a career in synthetic organic chemistry, 1970 to 2020. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131820] [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]
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5
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Ando Y. Total Syntheses of Structurally Complex Natural Products: Potential Reactivity of Organic Molecules. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry, School of Science, Tokyo Institute of Technology
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6
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Vyasamudri S, Yang DY. Light/inductive effect induced isomerization of chromeno-5-methyl-2,6,9-trioxabicyclo[3.3.1]nonadienes. NEW J CHEM 2020. [DOI: 10.1039/d0nj02288h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An efficient rearrangement of coumarin-based trioxabicycles and the effect of UV light and electron-withdrawing substituents on this transformation are reported.
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Affiliation(s)
| | - Ding-Yah Yang
- Department of Chemistry
- Tunghai University
- Taiwan
- Graduate Program for Biomedical and Materials Science
- Tunghai University
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7
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Jones CAH, Schley ND. Selective alkyl ether cleavage by cationic bis(phosphine)iridium complexes. Org Biomol Chem 2019; 17:1744-1748. [PMID: 30403222 DOI: 10.1039/c8ob02298d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Catalysts capable of heterolytic silane activation have been successfully applied to the conversion of alkyl ethers to silyl ethers via C-O bond cleavage. The previously-reported cationic pincer-supported iridium complex for this transformation suffers from poor selectivity with regard to monodealkylation of substrate ethers. We demonstrate that a simple non-pincer iridium complex offers improved selectivity and is capable of benzylic ether cleavage in the presence of reductively-labile alkyl and aryl halide functionality. Preliminary mechanistic experiments suggest a neutral tetrahydridosilyliridium resting state which is consistent with previous mechanistic hypotheses. These experiments suggest that a pincer ligand framework is not required for activity in ether cleavage reactions and that simple cationic bis(phosphine)iridium complexes may offer improved selectivity profiles for applications to more-complex substrate molecules.
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Affiliation(s)
- Caleb A H Jones
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA.
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8
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Heravi MM, Zadsirjan V, Saedi P, Momeni T. Applications of Friedel-Crafts reactions in total synthesis of natural products. RSC Adv 2018; 8:40061-40163. [PMID: 35558228 PMCID: PMC9091380 DOI: 10.1039/c8ra07325b] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/03/2018] [Indexed: 12/17/2022] Open
Abstract
Over the years, Friedel-Crafts (FC) reactions have been acknowledged as the most useful and powerful synthetic tools for the construction of a special kind of carbon-carbon bond involving an aromatic moiety. Its stoichiometric and, more recently, its catalytic procedures have extensively been studied. This reaction in recent years has frequently been used as a key step (steps) in the total synthesis of natural products and targeted complex bioactive molecules. In this review, we try to underscore the applications of intermolecular and intramolecular FC reactions in the total syntheses of natural products and complex molecules, exhibiting diverse biological properties.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Pegah Saedi
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Tayebeh Momeni
- Department of Chemistry, School of Science, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
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9
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Ando Y, Hanaki A, Sasaki R, Ohmori K, Suzuki K. Stereospecificity in Intramolecular Photoredox Reactions of Naphthoquinones: Enantioselective Total Synthesis of (−)-Spiroxin C. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705562] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Atsuko Hanaki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Ryota Sasaki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Ken Ohmori
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Keisuke Suzuki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
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10
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Ando Y, Hanaki A, Sasaki R, Ohmori K, Suzuki K. Stereospecificity in Intramolecular Photoredox Reactions of Naphthoquinones: Enantioselective Total Synthesis of (−)-Spiroxin C. Angew Chem Int Ed Engl 2017; 56:11460-11465. [DOI: 10.1002/anie.201705562] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Atsuko Hanaki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Ryota Sasaki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Ken Ohmori
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
| | - Keisuke Suzuki
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro Tokyo 152-8551 Japan
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11
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Jaggavarapu SR, Kamalakaran AS, Gayatri G, Shukla M, Dorai K, Gaddamanugu G. Facile access to novel chromeno-2,6,9-trioxabicyclo[3.3.1]nonadienes via tandem nucleophilic substitution and [4+2] hetero Diels–Alder reaction: experimental and theoretical study. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Wiegmann S, Neumann B, Stammler HG, Mattay J. Inherently Chiral Cyano-Substituted Resorcin[4]arene: A Promising Starting Point for Further Functionalization. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200507] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Duschek A, Kirsch SF. 2-Iodoxybenzoic Acid-A Simple Oxidant with a Dazzling Array of Potential Applications. Angew Chem Int Ed Engl 2011; 50:1524-52. [DOI: 10.1002/anie.201000873] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 12/26/2022]
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14
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Duschek A, Kirsch SF. 2-Iodoxybenzoesäure - ein einfaches Oxidationsmittel mit einer Vielfalt an Anwendungsmöglichkeiten. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201000873] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Hookins DR, Burns AR, Taylor RJK. The First Syntheses of (±)-SDEF 678 Metabolite and (±)-Speciosins A-C. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001402] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Krumlinde P, Bogár K, Bäckvall JE. Asymmetric Synthesis of Bicyclic Diol Derivatives through Metal and Enzyme Catalysis: Application to the Formal Synthesis of Sertraline. Chemistry 2010; 16:4031-6. [DOI: 10.1002/chem.200903114] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Cai YS, Guo YW, Krohn K. Structure, bioactivities, biosynthetic relationships and chemical synthesis of the spirodioxynaphthalenes. Nat Prod Rep 2010; 27:1840-70. [PMID: 21038061 DOI: 10.1039/c0np00031k] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- You-Sheng Cai
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zu Chong Zhi Rd. 555, Shanghai, 201203, People's Republic of China
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18
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Kündig EP, Enriquez-Garcia A. Diastereoselective and enantioselective reduction of tetralin-1,4-dione. Beilstein J Org Chem 2008; 4:37. [PMID: 19043623 PMCID: PMC2587944 DOI: 10.3762/bjoc.4.37] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Accepted: 10/05/2008] [Indexed: 11/23/2022] Open
Abstract
Background The chemistry of tetralin-1,4-dione, the stable tautomer of 1,4-dihydroxynaphthalene, has not been explored previously. It is readily accessible and offers interesting opportunities for synthesis. Results The title reactions were explored. L-Selectride reduced the diketone to give preferentially the cis-diol (d.r. 84 : 16). Red-Al gave preferentially the trans-diol (d.r. 13 : 87). NaBH4, LiAlH4, and BH3 gave lower diastereoselectivities (yields: 76–98%). Fractional crystallization allowed isolation of the cis-diol and the trans-diol (55% and 66% yield, respectively). Borane was used to cleanly give the mono-reduction product. Highly enantioselective CBS reductions afforded the trans-diol (72% yield, 99% ee) and the mono-reduction product (81%, 95% ee). Conclusion Diastereoselective and enantioselective reductions of the unexplored tetralin-1,4-dione provides a very convenient entry into a number of synthetically highly attractive 1,4-tetralindiols and 4-hydroxy-1-tetralone.
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Affiliation(s)
- E Peter Kündig
- Department of Organic Chemistry, University of Geneva, 1211 Geneva 4, Switzerland.
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Macías-Rubalcava ML, Hernández-Bautista BE, Jiménez-Estrada M, González MC, Glenn AE, Hanlin RT, Hernández-Ortega S, Saucedo-García A, Muria-González JM, Anaya AL. Naphthoquinone spiroketal with allelochemical activity from the newly discovered endophytic fungus Edenia gomezpompae. PHYTOCHEMISTRY 2008; 69:1185-1196. [PMID: 18234248 DOI: 10.1016/j.phytochem.2007.12.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 10/29/2007] [Accepted: 12/03/2007] [Indexed: 05/25/2023]
Abstract
Chemical investigation of the mycelium of Edenia gomezpompae, a newly discovered endophytic fungus isolated from the leaves of Callicarpa acuminata (Verbenaceae) collected from the ecological reserve El Eden, Quintana Roo, Mexico, resulted in the isolation of four naphthoquinone spiroketals, including three new compounds and palmarumycin CP2 (4). We elucidated the structures of the metabolites by extensive NMR spectroscopy studies, including DEPT, COSY, NOESY, HSQC, HMBC, and chiroptical methods. The trivial names proposed for these compounds are preussomerin EG1 (1), preussomerin EG2 (2) and preussomerin EG3 (3). In addition, the X-ray data for 4 were obtained. The bioactivity of the mycelial organic extracts and the pure compounds was tested against three endophytic fungi (Colletotrichum sp., Phomopsis sp., and Guignardia manguifera) isolated from the same plant species (C. acuminata, Verbenaceae) and against four economically important phytopathogenic microorganisms (two fungoid oomycetes, Phythophtora capsici and Phythophtora parasitica, and the fungi Fusarium oxysporum and Alternaria solani). Spiroketals 1-3 displayed significant growth inhibition against all the phytopathogens. IC50 values for the four phytopathogens were from 20 to 170 microg/ml. Palmarumycin CP2 (4) was not bioactive against any of the fungi tested. Compound 1 showed the strongest bioactivity. The acetylated derivatives of preussomerin EG1 (1), 1a and 1b, were obtained and their biological activity was tested on endophytes and phytopathogens. Preussomerin EG1 1, 1a and 1b exhibited significant bioactivity against all microorganisms tested with the exception of Alternaria solani. This is the first report of allelochemicals with antifungal activity from the newly discovered endophytic fungus E. gomezpompae.
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Affiliation(s)
- Martha L Macías-Rubalcava
- Instituto de Ecología, Departamento de Ecología Funcional, Universidad Nacional Autónoma de México, Apartado Postal 70-275, Ciudad Universitaria, 04510 Mexico DF, Mexico
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Mandal D, Wu AQ, Guo GC, Ray D. Copper complex of an iminodioxabicyclo[3.3.1]nonane pendant ligand: the first example of iminodioxocin bridgehead nitrogen coordination. Inorg Chem 2006; 45:8826-8. [PMID: 17054332 DOI: 10.1021/ic060833b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The pentadentate N4O amine-imine-naphthol ligand (HL(D)) containing rigid 8,16-imino-8H,16H-dinaphtho[2,1-b:2,1-f][1,5]dioxocin is formed preferentially, under visible light irradiation conditions, instead of the product H3L, expected from imidazolidine ring formation. A strained chelate bite enforces the first bridgehead nitrogen coordination to a copper(II) ion from the bicyclic iminodioxocin part of the ligand as shown by X-ray crystallography.
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Affiliation(s)
- Debashree Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India
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Miyashita K, Imanishi T. Syntheses of Natural Products Having an Epoxyquinone Structure. Chem Rev 2005; 105:4515-36. [PMID: 16351052 DOI: 10.1021/cr040613k] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuyuki Miyashita
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan
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