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Zur Kenntnis der Triterpene. 185. Mitteilung. Überführung von α‐Amyrin in Ursan
Author(s) -
Lyssy T.,
Jeger O.
Publication year - 1955
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.19550380530
Subject(s) - chemistry , triterpene , stereochemistry , medicine , pathology , alternative medicine
3β‐Acetoxy‐11‐ketoursene‐(12) (II) on treatment with lithium and ammonia gives rise to a mixture of products from which 3β‐acetoxy‐11‐ketoursane (III) can be isolated by fractional crystallisation. The latter compound may be further reduced to 3β‐acetoxy‐ursane (VII) and to the saturated hydrocarbone ursane (VI).