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Zur Kenntnis der Triterpene. 181. Mitteilung. Über Umlagerungen im Ring C der Ursolsäure
Author(s) -
Arigoni D.,
Bosshard H.,
Dreiding J.,
Jeger O.
Publication year - 1954
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19540370730
Subject(s) - chemistry , triterpene , ursolic acid , stereochemistry , ketone , ring (chemistry) , terpene , organic chemistry , medicine , alternative medicine , chromatography , pathology
A number of rearrangements in ring C of the pentacyclic triterpene ursolic acid is described. The products have been examined and the mechanism of their formation is discussed. One of these products, the hydroxy‐acid VI, is of particular importance. It has been degraded by oxidation to products of low molecular weight, one of which, the acetoxy‐ketone XX, has been obtained previously from rings A and B of α‐amyrin.