Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina

A comprehensive GC–MS analysis of 8 spp. revealed altogether 52 ipangulines (unique platynecine esters) and 21 minalobines (unique trachelanthamidine esters), respectively. Two minalobines have been isolated and structurally elucidated. A comprehensive GC–MS analysis of 8 Ipomoea species belonging t...

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Veröffentlicht in:Phytochemistry (Oxford) 2005, Vol.66 (2), p.223-231
Hauptverfasser: Jenett-Siems, Kristina, Ott, Sonja C., Schimming, Thomas, Siems, Karsten, Müller, Frank, Hilker, Monika, Witte, Ludger, Hartmann, Thomas, Austin, Daniel F., Eich, Eckart
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container_end_page 231
container_issue 2
container_start_page 223
container_title Phytochemistry (Oxford)
container_volume 66
creator Jenett-Siems, Kristina
Ott, Sonja C.
Schimming, Thomas
Siems, Karsten
Müller, Frank
Hilker, Monika
Witte, Ludger
Hartmann, Thomas
Austin, Daniel F.
Eich, Eckart
description A comprehensive GC–MS analysis of 8 spp. revealed altogether 52 ipangulines (unique platynecine esters) and 21 minalobines (unique trachelanthamidine esters), respectively. Two minalobines have been isolated and structurally elucidated. A comprehensive GC–MS analysis of 8 Ipomoea species belonging to the subgenus Quamoclit, section Mina revealed that the members of this taxon form combinations of two necine bases with rare necic acids resulting in unique pyrrolizidine alkaloids. The occurrence and diversity of these metabolites show remarkable variations: Some species, especially Ipomoea hederifolia and Ipomoea lobata, are able to synthesize a large number of alkaloids whereas others, especially Ipomoea coccinea and Ipomoea quamoclit, are poor synthesizers with only a few compounds. However, these metabolites are apparently chemotaxonomic markers of this infrageneric taxon in general. They represent either esters of (−)-platynecine (altogether 48 ipangulines and 4 further esters including results of a previous study) or esters of (−)-trachelanthamidine, an additional novel structural type called minalobines (altogether 21 alkaloids). Both types are characterized by section-specific rare necic acids, e.g., ipangulinic/isoipangulinic acid, phenylacetic acid. The alkaloids of Ipomoea cholulensis, I. coccinea, I. hederifolia, Ipomoea neei, and Ipomoea quamoclit were mono and diesters of platynecine. Minalobines turned out to be metabolites of I. lobata (Cerv.) Thell. (syn.: Mina lobata Cerv.) lacking ipangulines. The major alkaloid of this species, minalobine R, has been isolated and identified as 9- O-( threo-2-hydroxy-2-methyl-3-phenylacetoxy-butyryl)-(−)-trachelanthamidine on the basis of spectral data. Apparently only two of the species included in this study, Ipomoea cristulata and Ipomoea sloteri, are able to synthesize both, ipangulines as well as minalobines. Minalobine O could be isolated as a major alkaloid of I. cristulata, its structure has been established as 9- O-( erythro-2-hydroxy-2-methyl-3-tigloyloxy-butyryl)-(−)-trachelanthamidine on the basis of spectral data.
doi_str_mv 10.1016/j.phytochem.2004.11.019
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Two minalobines have been isolated and structurally elucidated. A comprehensive GC–MS analysis of 8 Ipomoea species belonging to the subgenus Quamoclit, section Mina revealed that the members of this taxon form combinations of two necine bases with rare necic acids resulting in unique pyrrolizidine alkaloids. The occurrence and diversity of these metabolites show remarkable variations: Some species, especially Ipomoea hederifolia and Ipomoea lobata, are able to synthesize a large number of alkaloids whereas others, especially Ipomoea coccinea and Ipomoea quamoclit, are poor synthesizers with only a few compounds. However, these metabolites are apparently chemotaxonomic markers of this infrageneric taxon in general. They represent either esters of (−)-platynecine (altogether 48 ipangulines and 4 further esters including results of a previous study) or esters of (−)-trachelanthamidine, an additional novel structural type called minalobines (altogether 21 alkaloids). Both types are characterized by section-specific rare necic acids, e.g., ipangulinic/isoipangulinic acid, phenylacetic acid. The alkaloids of Ipomoea cholulensis, I. coccinea, I. hederifolia, Ipomoea neei, and Ipomoea quamoclit were mono and diesters of platynecine. Minalobines turned out to be metabolites of I. lobata (Cerv.) Thell. (syn.: Mina lobata Cerv.) lacking ipangulines. The major alkaloid of this species, minalobine R, has been isolated and identified as 9- O-( threo-2-hydroxy-2-methyl-3-phenylacetoxy-butyryl)-(−)-trachelanthamidine on the basis of spectral data. Apparently only two of the species included in this study, Ipomoea cristulata and Ipomoea sloteri, are able to synthesize both, ipangulines as well as minalobines. 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Psychology</topic><topic>Gas Chromatography-Mass Spectrometry</topic><topic>ipanguline</topic><topic>Ipangulines</topic><topic>Ipomoea</topic><topic>Ipomoea - chemistry</topic><topic>Ipomoea - classification</topic><topic>Ipomoea - genetics</topic><topic>minalobine</topic><topic>Minalobines</topic><topic>Molecular Structure</topic><topic>necic acid</topic><topic>necine</topic><topic>phytochemicals</topic><topic>Plant cytology, morphology, systematics, chorology and evolution</topic><topic>Plant physiology and development</topic><topic>plant taxonomy</topic><topic>Platynecine esters</topic><topic>Pyrrolizidine alkaloids</topic><topic>Pyrrolizidine Alkaloids - analysis</topic><topic>Pyrrolizidine Alkaloids - chemistry</topic><topic>Pyrrolizidine Alkaloids - isolation &amp; purification</topic><topic>Section Mina</topic><topic>spectral analysis</topic><topic>Spermatophyta</topic><topic>Subgenus Quamoclit</topic><topic>Systematics (diagnosis, chromosome numbers)</topic><topic>Trachelanthamidine esters</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jenett-Siems, Kristina</creatorcontrib><creatorcontrib>Ott, Sonja C.</creatorcontrib><creatorcontrib>Schimming, Thomas</creatorcontrib><creatorcontrib>Siems, Karsten</creatorcontrib><creatorcontrib>Müller, Frank</creatorcontrib><creatorcontrib>Hilker, Monika</creatorcontrib><creatorcontrib>Witte, Ludger</creatorcontrib><creatorcontrib>Hartmann, Thomas</creatorcontrib><creatorcontrib>Austin, Daniel F.</creatorcontrib><creatorcontrib>Eich, Eckart</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Phytochemistry (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jenett-Siems, Kristina</au><au>Ott, Sonja C.</au><au>Schimming, Thomas</au><au>Siems, Karsten</au><au>Müller, Frank</au><au>Hilker, Monika</au><au>Witte, Ludger</au><au>Hartmann, Thomas</au><au>Austin, Daniel F.</au><au>Eich, Eckart</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina</atitle><jtitle>Phytochemistry (Oxford)</jtitle><addtitle>Phytochemistry</addtitle><date>2005</date><risdate>2005</risdate><volume>66</volume><issue>2</issue><spage>223</spage><epage>231</epage><pages>223-231</pages><issn>0031-9422</issn><eissn>1873-3700</eissn><abstract>A comprehensive GC–MS analysis of 8 spp. revealed altogether 52 ipangulines (unique platynecine esters) and 21 minalobines (unique trachelanthamidine esters), respectively. 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Minalobine O could be isolated as a major alkaloid of I. cristulata, its structure has been established as 9- O-( erythro-2-hydroxy-2-methyl-3-tigloyloxy-butyryl)-(−)-trachelanthamidine on the basis of spectral data.</abstract><cop>Amsterdam</cop><pub>Elsevier Ltd</pub><pmid>15652579</pmid><doi>10.1016/j.phytochem.2004.11.019</doi><tpages>9</tpages></addata></record>
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identifier ISSN: 0031-9422
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language eng
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source MEDLINE; ScienceDirect
subjects Biological and medical sciences
Chemical constitution
chemical structure
chemotaxonomy
Convolvulaceae
Fundamental and applied biological sciences. Psychology
Gas Chromatography-Mass Spectrometry
ipanguline
Ipangulines
Ipomoea
Ipomoea - chemistry
Ipomoea - classification
Ipomoea - genetics
minalobine
Minalobines
Molecular Structure
necic acid
necine
phytochemicals
Plant cytology, morphology, systematics, chorology and evolution
Plant physiology and development
plant taxonomy
Platynecine esters
Pyrrolizidine alkaloids
Pyrrolizidine Alkaloids - analysis
Pyrrolizidine Alkaloids - chemistry
Pyrrolizidine Alkaloids - isolation & purification
Section Mina
spectral analysis
Spermatophyta
Subgenus Quamoclit
Systematics (diagnosis, chromosome numbers)
Trachelanthamidine esters
title Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina
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