1978
DOI: 10.1002/hlca.19780610326
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Vitispiranes, Important Constitutents of Vanilla Aroma

Abstract: The preparation of the vitispiranes 9 and 10, identified among the volatiles of vanilla, from the theaspiranes 1 and 2 via the intermediates 4 and 5 and the allyl alcohols 7 and 8, respectively, is described. The theaspiranes 1 and 2 can be obtained from the compounds 11–15 or 24–26.

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Cited by 65 publications
(26 citation statements)
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“…Through reduction of 1 the C 13 -triol 11 is obtained which is known to yield isomeric vitispiranes 12. The spiroethers 12 are characterized by pleasant flowery, fruity notes [13]. The reduction of 1 was achieved by treatment of the methanolic extract with baker's yeast as shown in Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Through reduction of 1 the C 13 -triol 11 is obtained which is known to yield isomeric vitispiranes 12. The spiroethers 12 are characterized by pleasant flowery, fruity notes [13]. The reduction of 1 was achieved by treatment of the methanolic extract with baker's yeast as shown in Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Isomerisation of epoxide 4a to allyl alcohol 22 was reported with aluminium triisopropoxide at 140 °C [46]. However, in our hands this procedure gave only complex reaction mixtures containing minor amounts of the target allyl alcohol 22 .…”
Section: Resultsmentioning
confidence: 68%
“…Various syntheses of vitispirane have been reported in the literature [4345]. To get sufficient quantity of the oxidation precursor, we focused on a strategy reported by Ohloff starting from commercially available theaspirane ( 1 ) [46]. As described by Ohloff and coworkers, the separation of vitispirane diastereoisomers is quite difficult.…”
Section: Resultsmentioning
confidence: 99%
“…[6] Da auch bei 1 und 3 der Johannisbeer-Duft entscheidend von der Konfiguration abhängt, hielten wir es für interessant, die Riechstoff-Eigenschaften aller Stereoisomere von Cassyran (7) und ihrer Dihydro-Derivate zu untersuchen. Zur Bestimmung der relativen Konfigurationen und der zugehörigen Gasphasenstrukturen schien uns die Kombination aus Mikrowellenspektroskopie und quantenchemischen Rechnungen hervorragend geeignet.…”
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