Terpenoids and related compounds. Part 25. Structures of the 25-nortriterpenoids putrol and putrone
Abstract
The suggested structures of putrol (1a) and putrone (1b) have been supported by the conversion of putrone into D : A-friedo-oleana-7,9(11)-diene (2). The latter has also been synthesised from 25-acetoxy-D : A-friedo-olean-7-ene (3a).