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Zorrilla JG, Cárdenas DM, Rial C, Molinillo JM, Varela RM, Masi M, Macías FA. Bioprospection of Phytotoxic Plant-Derived Eudesmanolides and Guaianolides for the Control of Amaranthus viridis, Echinochloa crus-galli, and Lolium perenne Weeds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:1797-1810. [PMID: 38206382 PMCID: PMC10811690 DOI: 10.1021/acs.jafc.3c06901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 12/25/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024]
Abstract
The phytotoxicities of a selection of eudesmanolides and guaianolides, including natural products and new derivatives obtained by semisynthesis from plant-isolated sesquiterpene lactones, were evaluated in bioassays against three weeds of concern in agriculture (Amaranthus viridis L., Echinochloa crus-galli L., and Lolium perenne L.). Both eudesmanolides and guaianolides were active against the root and shoot growth of all the species, with the eudesmanolides generally showing improved activities. The IC50 values obtained for the herbicide employed as positive control (on root and shoot growth, respectively, A. viridis: 27.8 and 85.7 μM; E. crus-galli: 167.5 and 288.2 μM; L. perenne: 99.1 and 571.4 μM) were improved in most of the cases. Structure-activity relationships were discussed, finding that hydroxylation of the A-ring and C-13 as well as the position, number, and orientation of the hydroxyl groups and the presence of an unsaturated carbonyl group can significantly influence the level of phytotoxicity. γ-Cyclocostunolide was the most active compound in the series, followed by others such as dehydrozaluzanin C and α-cyclocostunolide (outstanding their IC50 values on A. viridis)─natural products that can therefore be suggested as models for herbicide development if further research indicates effectiveness on a larger scale and environmental safety in ecotoxicological assessments.
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Affiliation(s)
- Jesús G. Zorrilla
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso Universitario Monte S. Angelo, Via Cinthia 4, 80126 Naples, Italy
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
| | - David M. Cárdenas
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
| | - Carlos Rial
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
| | - José M.G. Molinillo
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
| | - Rosa M. Varela
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
| | - Marco Masi
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso Universitario Monte S. Angelo, Via Cinthia 4, 80126 Naples, Italy
| | - Francisco A. Macías
- Allelopathy
Group, Department of Organic Chemistry, Facultad de Ciencias, Institute
of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui,
7, 11510 Puerto
Real, Spain
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Cala A, Zorrilla JG, Rial C, Molinillo JMG, Varela RM, Macías FA. Easy Access to Alkoxy, Amino, Carbamoyl, Hydroxy, and Thiol Derivatives of Sesquiterpene Lactones and Evaluation of Their Bioactivity on Parasitic Weeds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:10764-10773. [PMID: 31487158 DOI: 10.1021/acs.jafc.9b03098] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It has been hypothesized that the α-methylene-γ-lactone moiety of sesquiterpene lactones is a key unit for their bioactivity. As a consequence, modifications of these compounds have been focused on this fragment. In the work reported here, two sesquiterpene lactones, namely, dehydrocostuslactone and β-cyclocostunolide, a eudesmanolide obtained by controlled cyclization of costunolide, were chosen for modification by Michael addition at C-13. On applying this reaction to both compounds, it was possible to introduce the functional groups alkoxy, amino, carbamoyl, hydroxy, and thiol to give products in good to high yields, depending on the base and solvent employed. In particular, the introduction of a thiol group at C-13 in both compounds was achieved with outstanding yields (>90%) and this is unprecedented for these sesquiterpene lactones. The bioactivities of the products were evaluated on etiolated wheat coleoptile elongation and germination of seeds of parasitic weeds, with significant activity observed on Orobanche cumana and Phelipanche ramosa. The structure-activity relationships are discussed.
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Affiliation(s)
- Antonio Cala
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
| | - Jesús G Zorrilla
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
| | - Carlos Rial
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
| | - José M G Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
| | - Rosa M Varela
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
| | - Francisco A Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science , University of Cadiz , C/Republica Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain
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Chen JQ, Song LL, Li FX, Shi ZF, Cao XP. Asymmetric formal synthesis of (+)-cycloclavine. Chem Commun (Camb) 2017; 53:12902-12905. [DOI: 10.1039/c7cc08044a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The asymmetric synthesis of Szántay's amine (+)-2, the pivotal precursor for direct access to (+)-cycloclavine (1), is described for the first time in eleven steps with 19.7% overall yield from the commercially available 4-bromoindole.
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Affiliation(s)
- Jin-Quan Chen
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Le-Le Song
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Feng-Xing Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Zi-Fa Shi
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
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Macías FA, García-Díaz MD, Pérez-de-Luque A, Rubiales D, Galindo JCG. New chemical clues for broomrape-sunflower host-parasite interactions: synthesis of guaianestrigolactones. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:5853-5864. [PMID: 19507857 DOI: 10.1021/jf900870j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A comparative structure-activity relationship (SAR) study has been conducted with several guaianolide sesquiterpene lactones (SLs) as inducers of the germination of sunflower broomrape (Orobanche cumana) seeds. Compounds were selected and synthesized to study the influence of the lactone-enol-gamma-lactone moiety on the selectivity of SLs toward the stimulation of sunflower broomrape germination. The results clearly illustrate that SLs are recognized only by O. cumana, while the introduction of a strigol-like second lactone moiety in the guaianolide backbone results in the loss of specificity and hence the germination of other broomrape species. We have named this new class of compounds guaianestrigolactones (GELs).
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Affiliation(s)
- Francisco A Macías
- Grupo de Alelopatia, Depto de Química Orgánica, Facultad de Ciencias, Universidad de Cadiz, Puerto Real, Cadiz, Spain.
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