Selective transformations of friedelanes isolated from cork smoker wash solids.
Steroids
; 201: 109333, 2024 Jan.
Article
in En
| MEDLINE
| ID: mdl-37939981
Friedelin (1) and 3-acetoxyfriedel-3-en-2-one (4), commonly known as friedelane triterpenoids, have been isolated from cork smoker wash solids (also known as black wax) on a multi-gram scale. These compounds are valuable starting materials for the synthesis of new friedelane derivatives. Stereoselective reduction of friedelin by treatment with LiAlH4, sodium, or catalytic hydrogenation results in the formation of both isomers of friedelinol (5 and 7) in excellent yields. Similarly, the reduction of 3-acetoxyfriedel-3-en-2-one gave epi-cerin (14) and a series of isomeric 2,3-diols or α-hydroxyketones. These transformations provide the most straightforward and convenient methods for the synthesis of A-ring functionalised friedelane derivatives using easily accessible starting materials.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Triterpenes
/
Smokers
Limits:
Humans
Language:
En
Journal:
Steroids
Year:
2024
Document type:
Article
Affiliation country:
Poland
Country of publication:
United States