𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Structure Determination of New Iridals from Iris pallida and Iris foetidissima

✍ Scribed by Andrè Littek; Franz-Josef Marner

Publisher
John Wiley and Sons
Year
1991
Tongue
German
Weight
612 KB
Volume
74
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The four novel iridals 8–10 and 18 were isolated from rhizome extracts of Iris pallida and Iris foetidissima, and their structures were established by spectroscopic methods and oxidative degradation. The compounds 8–10 bearing a conjugated triene moiety are extremely labile and decompose rapidly. Thus, the monocyclic triene 8 was only isolated after its conversion to a Diels‐Alder adduct with 4‐phenyl‐3H‐1,2,4‐triazole‐3,5(4__H__)‐dione (14), The tricyclic iridal 18 is a hitherto unknown precursor of α‐irone. The possible biogenesis of these unusual triterpenoids is discussed.

📜 SIMILAR VOLUMES

Analysis of Constituents of Iris Rhizome
Analysis of Constituents of Iris Rhizomes. Part III—Packed Column Supercritical Fluid Chromatography and High Pressure Liquid Chromatography of Iridals from Rhizomes of Iris pallida L.
✍ Carlo Bicchi; Patrizia Rubiolo; Monica Fresia; Frank David; Pat Sandra 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 435 KB 👁 2 views

## Iridals constitute a class of triterpenoids characteristic of the genus Iris which have been demonstrated to be the precursors of irones, a group of compounds widely and successfully used in the perfume industry because of their attractive violet smell. Packed column supercritical fluid chromato

Isolation and Structure Determination of
Isolation and Structure Determination of new Iridals fromIris sibirica andIris versicolor
✍ Marner, Franz-Josef ;Longerich, Irmgard 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 382 KB

## Abstract Four novel iridals (compounds 8, 11, 12, and 13), representing new examples of these unusual monocyclic triterpenoids from sword lilies, have been isolated from rhizome extracts of __I. sibirica__ and __I. versicolor__. Their structures have been elucidated by spectroscopic methods comb