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Melo DJ, Borges EO, Szczerbowski D, Vidal DM, Schulz S, Zarbin PHG. Identification and Synthesis of a Macrolide as an Anti-aphrodisiac Pheromone from Males of Heliconius erato phyllis. Org Lett 2022; 24:3772-3775. [PMID: 35609879 DOI: 10.1021/acs.orglett.2c01160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigation of the contents of the scent glands of the heliconiine butterfly Heliconius erato phyllis via gas chromatography/electroantennography revealed an unprecedented active compound. The males transfer this compound to females during mating. The structure of (2R,6E,10R)-2,6-dimethyl-6-undecen-10-olide, a derivative of geranylacetone, was proposed on the basis of infrared and mass spectrometry spectra and microderivatization and confirmed by racemic and stereoselective syntheses. Bioassays with the synthetic macrolide showed the repellency of this compound, termed phyllisolide, when applied to scent glands of females, identifying it as an anti-aphrodisiac pheromone.
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Affiliation(s)
- Douglas J Melo
- Universidade Federal do Paraná, Departamento de Química, 81531-990 Curitiba, Brazil
| | - Eliane O Borges
- Universidade Federal do Paraná, Departamento de Zoologia, 81531-990 Curitiba, Brazil
| | - Daiane Szczerbowski
- Universidade Federal do Paraná, Departamento de Química, 81531-990 Curitiba, Brazil.,Technische Universität Braunschweig, Institute of Organic Chemistry, 38106 Braunschweig, Germany
| | - Diogo M Vidal
- Universidade Federal de Minas Gerais, Departamento de Química, 31270-901 Belo Horizonte, Brazil
| | - Stefan Schulz
- Technische Universität Braunschweig, Institute of Organic Chemistry, 38106 Braunschweig, Germany
| | - Paulo H G Zarbin
- Universidade Federal do Paraná, Departamento de Química, 81531-990 Curitiba, Brazil
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2
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Schulz S, Poth D, Peram PS, Hötling S, Menke M, Melnik K, Röpke R. Chemical Diversity of Volatile Macrocylic Lactones from Frogs. Synlett 2021. [DOI: 10.1055/a-1381-2881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractFor a long time, frogs were believed to communicate primarily via the acoustic channel, but during the last decades it became obvious that various lineages also use chemical communication. In this Account we present our research on the identification of volatile lactones from Madagascan Mantellidae and African Hyperoliidae frogs. Both possess male specific glands that can disseminate a range of volatile compounds. Key constituents are macrocyclic lactones. They show high variability in structure and occurrence. We focus here on the synthetic approaches we have used to clarify constitution and configuration of the glandular compounds. Key synthetic methods are ring-closing metathesis and nucleophilic epoxide opening. Often, but not always, the natural compounds occurs in amounts that excludes their investigation by NMR spectroscopy. Instead, we use GC/MS analysis, GC/IR, microreactions, and synthesis to identify such components. Several aspects of our work will be described giving some insight in our scientific approach.1 Introduction2 Macrocylic Lactones from the Fatty Acid Biosynthetic Pathway3 Unsaturated Lactones4 Terpenoid Lactones5 Macrolide Occurrence6 Conclusions
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3
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Li G, Guo YW, Dickschat JS. The mass spectrometric fragmentation mechanisms of catenulane and isocatenulane diterpenes. Org Biomol Chem 2021; 19:2224-2232. [PMID: 33624667 DOI: 10.1039/d1ob00160d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Two new diterpene derivatives were obtained by semisynthesis from enzymatically generated catenul-14-en-6-ol. The EI-MS fragmentation mechanisms of three enzyme products and the two semisynthetic derivatives were investigated by extensive 13C-labelling experiments.
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Affiliation(s)
- Geng Li
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany. and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, 201203, Shanghai, China. and University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, 201203, Shanghai, China. and University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Jeroen S Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
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4
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Kingwell C, Böröczky K, Steitz I, Ayasse M, Wcislo W. Cuticular and Dufour's Gland Chemistry Reflect Reproductive and Social State in the Facultatively Eusocial Sweat Bee Megalopta genalis (Hymenoptera: Halictidae). J Chem Ecol 2021; 47:420-432. [PMID: 33682070 DOI: 10.1007/s10886-021-01262-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/23/2021] [Accepted: 03/02/2021] [Indexed: 01/18/2023]
Abstract
Queen pheromones evolved independently in multiple eusocial insect lineages, in which they mediate reproductive conflict by inhibiting worker ovarian development. Although fundamentally important for reproductive division of labor - the hallmark of eusociality - their evolutionary origins are enigmatic. Here, we analyze cuticular and Dufour's gland chemistries across alternative social and reproductive phenotypes in Megalopta genalis bees (tribe Augochlorini, family Halictidae) that facultatively express simple eusociality. Reproductive bees have distinct overall glandular and cuticular chemical phenotypes compared with non-reproductive workers. On the cuticle, a likely site of signal transmission, reproductives are enriched for certain alkenes, most linear alkanes, and are heavily enriched for all methyl-branched alkanes. Chemicals belonging to these compound classes are known to function as fertility signals in other eusocial insect taxa. Some macrocyclic lactones, compounds that serve as queen pheromones in the other eusocial halictid tribe (Halictini), are also enriched among reproductives relative to workers. The intra-population facultative eusociality of M. genalis permits direct comparisons between individuals expressing alternative reproductive phenotypes - females that reproduce alone (solitary reproductives) and social queens - to highlight traits in the latter that may be important mediators of eusociality. Compared with solitary reproductives, the cuticular chemistries of queens are more strongly differentiated from those of workers, and furthermore are especially enriched for methyl-branched alkanes. Determining the pheromonal function(s) and information content of the candidate signaling compounds we identify will help illuminate the early evolutionary history of queen pheromones, chemical signals central to the organization of insect eusocial behavior.
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Affiliation(s)
- Callum Kingwell
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA.
- Smithsonian Tropical Research Institute, Panama City, Panama.
| | - Katalin Böröczky
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA
| | - Iris Steitz
- Institute of Evolutionary Ecology and Conservation Genomics, University of Ulm, Ulm, Germany
| | - Manfred Ayasse
- Institute of Evolutionary Ecology and Conservation Genomics, University of Ulm, Ulm, Germany
| | - William Wcislo
- Smithsonian Tropical Research Institute, Panama City, Panama
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5
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Schmidt B. The Role of Total Synthesis in Structure Revision and Elucidation of Decanolides (Nonanolides). PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2021; 115:1-57. [PMID: 33797640 DOI: 10.1007/978-3-030-64853-4_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Ten-membered lactones are commonly observed structures of natural products. They are mostly fungal metabolites, which often act as plant pathogens, but recently ten-membered lactones were identified as pheromones of frogs and termites. Although modern spectroscopic methods are nowadays routinely used to elucidate the structure of natural products, structural assignments of ten-membered lactones often remain incomplete or are surprisingly often erroneous. Most errors concern the absolute configuration. The examples discussed in this chapter demonstrate that enantioselective total synthesis is not only an efficient tool for corroborating or revising a proposed structure, but that the synthesis of different stereoisomers as references for gas chromatographic investigations can be a vital part of the structure elucidation process if only minute amounts of material are available. As a method of outstanding importance for the synthesis of ten-membered lactones olefin metathesis has emerged. Most of the examples discussed herein use one or more olefin metathesis reactions as key steps.
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Affiliation(s)
- Bernd Schmidt
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476, Potsdam-Golm, Germany.
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Seukep AJ, Fan M, Sarker SD, Kuete V, Guo MQ. Plukenetia huayllabambana Fruits: Analysis of Bioactive Compounds, Antibacterial Activity and Relative Action Mechanisms. PLANTS 2020; 9:plants9091111. [PMID: 32872157 PMCID: PMC7569793 DOI: 10.3390/plants9091111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/15/2022]
Abstract
Plukenetia huayllabambana is an edible plant traditionally used to cure wounds and various infections. The present work assessed, for the first time, the antibacterial efficacy of solvent fractions from P. huayllabambana fruits. The crude methanol extract was obtained applying ultrasound-assisted extraction, followed by partitioning through successive depletion among solvents of increasing polarity to yield fractions (n-hexane, dichloromethane, ethyl acetate, and n-butanol). The minimal inhibitory concentration (MIC) was determined following antibacterial testing, using the broth microdilution technique against a panel of drug-resistant Gram-negative and Gram-positive bacteria. Possible modes of action of the most active fraction were also investigated. Gas chromatography-mass spectrometry (GC-MS) was used to identify phytocompounds that may account for the recorded activities. Methanol, n-hexane (PH-n-Hex), and ethyl acetate extracts inhibited 100% of studied bacteria, with the recorded MIC ranging from 0.125-1 mg/mL. PH-n-Hex appeared as the most active partition, exerting a bacteriostatic effect. PH-n-Hex probably acts by interfering with bacterial biofilm formation, proton pumps, and bacterial cell membrane integrity. The GC-MS analysis of PH-n-Hex led to the identification of 11 potentially bioactive components, including fatty acids, phytosterol, and diterpene alcohol as major ones. P. huayllabambana can be considered as a plant of pharmacological value-a source of potent anti-infective drug entities.
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Affiliation(s)
- Armel Jackson Seukep
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 437004, China; (A.J.S.); (M.F.)
- Department of Biomedical Sciences, Faculty of Health Sciences, University of Buea, P.O. Box 63, Buea, Cameroon
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 437004, China
- Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Shanghai 201203, China
| | - Minxia Fan
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 437004, China; (A.J.S.); (M.F.)
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 437004, China
- Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Shanghai 201203, China
| | - Satyajit Dey Sarker
- Centre for Natural Products Discovery, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK;
| | - Victor Kuete
- Unit of Research in Microbiology and Antimicrobial Substances/Laboratory of Cancer Research, Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon;
| | - Ming-Quan Guo
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 437004, China; (A.J.S.); (M.F.)
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 437004, China
- Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Shanghai 201203, China
- Correspondence: ; Tel./Fax: +86-27-8770-0850
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7
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Harris CM, Reece KS, Stec DF, Scott GP, Jones WM, Hobbs PLM, Harris TM. The toxin goniodomin, produced by Alexandrium spp., is identical to goniodomin A. HARMFUL ALGAE 2020; 92:101707. [PMID: 32113590 DOI: 10.1016/j.hal.2019.101707] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 11/04/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
In 1968 Burkholder and associates (J. Antibiot. (Tokyo)1968, 21, 659-664) isolated the antifungal toxin goniodomin from an unidentified Puerto Rican dinoflagellate and partially characterized its structure. Subsequently, a metabolite of Alexandrium hiranoi was isolated by Murakami et al. from a bloom in Japan and its structure was established (Tetrahedron Lett.1988, 29, 1149-1152). The Japanese substance had strong similarities to Burkholder's but due to uncertainty as to whether it was identical or only similar, Murakami named his toxin goniodomin A. A detailed study of this question now provides compelling evidence that Burkholder's goniodomin is identical to goniodomin A. Morphological characterization of the dinoflagellate suggests that it was the genus Alexandrium but insufficient evidence is available to make a definite identification of the species. This is the only report of goniodomin in the Caribbean region.
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Affiliation(s)
- Constance M Harris
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | - Kimberly S Reece
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA
| | - Donald F Stec
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | - Gail P Scott
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA
| | - William M Jones
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA
| | - Patrice L M Hobbs
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA
| | - Thomas M Harris
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA; Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA.
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8
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Silk P, Mayo P, Ryall K, Roscoe L. Semiochemical and Communication Ecology of the Emerald Ash Borer, Agrilus planipennis (Coleoptera: Buprestidae). INSECTS 2019; 10:E323. [PMID: 31569826 PMCID: PMC6835760 DOI: 10.3390/insects10100323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/12/2019] [Accepted: 09/20/2019] [Indexed: 11/28/2022]
Abstract
Knowledge of buprestid chemical ecology is sparse but the appearance of the invasive pest Agrilus planipennis Fairmaire in North America has provided the impetus to study in detail the semiochemistry and ecology of this important buprestid. The macrocyclic lactone (3Z)-12-dodecenolide [(3Z)-lactone] is identified as a key antennally-active compound that is produced by females and attracts males. Though a weak trap attractant alone, when combined with the host kairomone (3Z)-hexenol and the important visual cue of a green canopy trap, significant increases in male trap capture occur, thus defining (3Z)-lactone as both a sex pheromone of A. planipennis as well as the first and only known buprestid pheromone. The non-natural stereoisomer (3E)-12-dodecenolide and the saturated analog, 12-dodecanolide also exhibit mimetic activities towards male A. planipennis, suggesting a notable plasticity in this pheromonal structural motif. Efficient synthetic routes to these compounds have been developed. A series of fluoro-12-dodecanolides has also been synthesized containing CF2 groups as a strategy to bias the conformational space accessed by these macrolides and to assess if the analogs may act as mimetics for 12-dodecanolide pheromones associated in A. planipennis. These compounds also afford a unique opportunity to study the binding affinities of lactone surrogates with A. planipennis chemosensory proteins and olfactory receptors. Some progress has also been made in identifying the genes involved in the reception, processing and degradation of volatiles in this invasive insect. It is now evident that the behavior and ecology of A. planipennis involves a complex pattern of sensory modalities, including visual, tactile, olfactory and potentially acoustic components. Earlier reviews focused on studies of attractive host volatiles in development of a trapping system for early detection and visual and contact phenomena in A. planipennis mate finding. This review will update the semiochemistry and chemical ecology of A. planipennis and discuss studies on chemistry and behavior that have identified female-produced pheromone components and host kairomones.
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Affiliation(s)
- Peter Silk
- Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, 1350 Regent Street, Fredericton, NB E3B 5P7, Canada.
| | - Peter Mayo
- Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, 1350 Regent Street, Fredericton, NB E3B 5P7, Canada
| | - Krista Ryall
- Natural Resources Canada, Canadian Forest Service-Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, ON P6A 2E5, Canada
| | - Lucas Roscoe
- Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, 1350 Regent Street, Fredericton, NB E3B 5P7, Canada
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9
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Melnik K, Menke M, Rakotoarison A, Vences M, Schulz S. Identification and Synthesis of Luteolide, a Highly Branched Macrolide Semiochemical from the Mantellid Frog Gephyromantis luteus. Org Lett 2019; 21:2851-2854. [PMID: 30945870 DOI: 10.1021/acs.orglett.9b00852] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Luteolide is a 10-membered aliphatic macrolactone, (4 R,8 S,9 S)-4,8-dimethylundecan-9-olide ((-) -17), released by the femoral gland of males of the mantellid frog Gephyromantis luteus. Its structure was established using NMR, MS, and chiral GC and confirmed by stereoselective synthesis of different stereoisomers. Among the approximately 20 current macrolides known from the Mantellidae, luteolide is the first example of a volatile macrolide furnishing three stereogenic centers and an ethyl side chain.
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Affiliation(s)
- Kristina Melnik
- Technische Universität Braunschweig , Institute of Organic Chemistry , Hagenring 30 , 38106 Braunschweig , Germany
| | - Markus Menke
- Technische Universität Braunschweig , Institute of Organic Chemistry , Hagenring 30 , 38106 Braunschweig , Germany
| | - Andolalao Rakotoarison
- Technische Universität Braunschweig , Zoological Institute , Mendelssohnstraße 4 , 38106 Braunschweig , Germany.,Zoologie et Biodiversité Animale , Université d'Antananarivo , BP 906 , Antananarivo 101 , Madagascar
| | - Miguel Vences
- Technische Universität Braunschweig , Zoological Institute , Mendelssohnstraße 4 , 38106 Braunschweig , Germany
| | - Stefan Schulz
- Technische Universität Braunschweig , Institute of Organic Chemistry , Hagenring 30 , 38106 Braunschweig , Germany
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10
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Machara A, Křivánek J, Dolejšová K, Havlíčková J, Bednárová L, Hanus R, Majer P, Kyjaková P. Identification and Enantiodivergent Synthesis of (5 Z,9 S)-Tetradec-5-en-9-olide, a Queen-Specific Volatile of the Termite Silvestritermes minutus. JOURNAL OF NATURAL PRODUCTS 2018; 81:2266-2274. [PMID: 30299957 DOI: 10.1021/acs.jnatprod.8b00632] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The queens of social insects differ from sterile colony members in many aspects of their physiology. Besides adaptations linked with their specialization for reproduction and extended lifespan, the queens also invest in the maintenance of their reproductive dominance by producing exocrine chemicals signaling their presence to the nestmates. The knowledge of the chemistry of queen-specific cues in termites is scarce. In addition to the contact recognition based on cuticular hydrocarbons, long-range signals mediated by volatiles are expected to participate in queen signaling, especially in populous colonies of higher termites (Termitidae). In queens of the higher termite Silvestritermes minutus (Syntermitinae), we have detected a previously undescribed volatile. It is present in important quantities on the body surface and in the headspace, ovaries, and body cavity. MS and GC-FTIR data analyses led us to propose the structure of the compound to be a macrolide 10-pentyl-3,4,5,8,9,10-hexahydro-2 H-oxecin-2-one. We performed enantiodivergent syntheses of two possible enantiomers starting from enantiopure ( S)-glycidyl tosylate. The synthetic sequence involved macrolide-closing metathesis quenched with a ruthenium scavenging agent. The absolute and relative configuration of the compound was assigned to be (5 Z,9 S)-tetradec-5-en-9-olide. Identification and preparation of the compound allow for investigation of its biological significance.
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Affiliation(s)
- Aleš Machara
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Jan Křivánek
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Klára Dolejšová
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Jana Havlíčková
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Lucie Bednárová
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Robert Hanus
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
| | - Pavlína Kyjaková
- Institute of Organic Chemistry and Biochemistry of the CAS , Flemingovo n. 542/2 , 166 10 , Prague 6 , Czech Republic
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11
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Menke M, Melnik K, Peram PS, Starnberger I, Hödl W, Vences M, Schulz S. Frogolide - An Unprecedented Sesquiterpene Macrolactone from Scent Glands of African Frogs. European J Org Chem 2018; 2018:2651-2656. [PMID: 30078994 PMCID: PMC6070141 DOI: 10.1002/ejoc.201800199] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Indexed: 01/15/2023]
Abstract
Some amphibians use chemical signals in addition to optical and acoustical signals to transmit information. Males of mantellid frogs from Madagascar and hyperoliid frogs from Africa emit complex, species- and sex-specific bouquets of volatiles from their femoral or gular glands. We report here on the identification, synthesis, and determination of the absolute configuration of a macrocyclic lactone occurring in several species of both families, (S)-3,7,11-dodec-6,10-dien-12-olide (S-14, frogolide). Macrolides are a preferred compound class of frog volatiles. Nevertheless, frogolide is the first macrocyclic lactone obviously derived from the terpene pathway, in contrast to known frog macrolides that are usually formed via the fatty acid biosynthetic pathway.
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Affiliation(s)
- Markus Menke
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Kristina Melnik
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Pardha S. Peram
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Iris Starnberger
- Department for Integrative Zoology, Althanstraße 14, 1090 Vienna, Austria
| | - Walter Hödl
- Department for Integrative Zoology, Althanstraße 14, 1090 Vienna, Austria
| | - Miguel Vences
- Institute of Zoology, Technische Universität Braunschweig, Mendelsohnstraße 4, 38106 Braunschweig, Germany
| | - Stefan Schulz
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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