1979
DOI: 10.1016/0031-9422(79)83022-8
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Helifulvanolsäkure—ein neues diterpen mit anomalem kohlenstoffgerüst aus Helichrysum fulvum

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Cited by 21 publications
(5 citation statements)
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“…This reaction cascade requires GFPP in a starting conformation in which both Me groups at the olefinic planes C2 = C3 and C6 = C7 point up (and the olefinic hydrogens point down) to explain that these Me groups also point up in the product 9 (and the neighbouring hydrogens point down). Eight side products of SrS (10)(11)(12)(13)(14)(15)(16)(17) for the same reason require the same starting conformation of GFPP and can be explained from intermediate F Isotopic labelling experiments were performed to address the proposed cyclisation mechanism in all elementary steps (Table S13). The 25 isotopomers of ( 13 C)GFPP, obtained enzymatically using GFPPS from shorter correspondingly labelled oligoprenyl diphosphates, [20][21][22][23][24][25] were incubated with SrS to confirm the origin of each carbon of 9.…”
Section: Resultsmentioning
confidence: 99%
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“…This reaction cascade requires GFPP in a starting conformation in which both Me groups at the olefinic planes C2 = C3 and C6 = C7 point up (and the olefinic hydrogens point down) to explain that these Me groups also point up in the product 9 (and the neighbouring hydrogens point down). Eight side products of SrS (10)(11)(12)(13)(14)(15)(16)(17) for the same reason require the same starting conformation of GFPP and can be explained from intermediate F Isotopic labelling experiments were performed to address the proposed cyclisation mechanism in all elementary steps (Table S13). The 25 isotopomers of ( 13 C)GFPP, obtained enzymatically using GFPPS from shorter correspondingly labelled oligoprenyl diphosphates, [20][21][22][23][24][25] were incubated with SrS to confirm the origin of each carbon of 9.…”
Section: Resultsmentioning
confidence: 99%
“…[9,10] The related compound helifulvane (8) is the hypothetical parent hydrocarbon to a number of oxidised derivatives. [11] Despite the discovery of these compounds several decades or even more than 100 years ago, so far no hexacyclic sesterterpene hydrocarbons as direct terpene synthase products are known, while hexacyclic oxidised derivatives, such as the niduterpenoids A and B from Aspergillus nidulans, have been isolated. [12] Here we report on the discovery of a sesterterpene synthase from Streptomyces subrutilus that produces besides several pentacyclic compounds the hexacyclic sesterterpene hydrocarbon subrutilane.…”
Section: Introductionmentioning
confidence: 99%
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“…Es sind nur sehr wenige Verbindungen bekannt, die in diese Klasse hochcyclisierter Terpene fallen, darunter das tricyclische Monoterpen ( n =2) Cyclofenchen ( 1 ), [3] die tetracyclischen Sesquiterpene ( n =3) Longicyclen ( 2 ), [4] Cyclosativen ( 3 ), [5] Ishwaran ( 4 ), [6] Cycloseychellen ( 5 ) [7] und Cyclomyltaylan ( 6 ), [8] und das pentacyclische Diterpen ( n =4) Trachyloban ( 7 ) [9,10] . Die verwandte Verbindung Helifulvan ( 8 ) ist der hypothetische Stammkohlenwasserstoff einer Reihe oxidierter Derivate [11] . Trotz der Entdeckung dieser Verbindungen vor mehreren Jahrzehnten oder sogar mehr als 100 Jahren sind bisher keine hexacyclischen Sesterterpenkohlenwasserstoffe als direkte Terpensynthase‐Produkte bekannt, während hexacyclische oxidierte Derivate wie die Niduterpenoide A und B aus Aspergillus nidulans isoliert wurden [12] .…”
Section: Introductionunclassified
“…[9,10] Die verwandte Verbindung Helifulvan (8) ist der hypothetische Stammkohlenwasserstoff einer Reihe oxidierter Derivate. [11] Trotz der Entdeckung dieser Verbindungen vor mehreren Jahrzehnten oder sogar mehr als 100 Jahren sind bisher keine hexacyclischen Sesterterpenkohlenwasserstoffe als direkte Terpensynthase-Produkte bekannt, während hexacyclische oxidierte Derivate wie die Niduterpenoide A und B aus Aspergillus nidulans isoliert wurden. [12] Hier berichten wir über die Entdeckung einer Sesterterpensynthase aus Streptomyces subrutilus, die neben mehreren pentacyclischen Verbindungen den hexacyclischen Sesterterpenkohlenwasserstoff Subrutilan produziert.…”
Section: Introductionunclassified