65527-05-1Relevant academic research and scientific papers
Lichens and Fungi. Part 17. The Synthesis and Absolute Configuration at C-20 of the (R)- and (S)-Epimers of Some 29-Substituted Lupane Derivatives and of some 30-Norlupan-20-ol Derivatives and the Crystal Structure of (20R)-3β-Acetoxylupan-29-ol.
Corbett, Edward R.,Cong, Aimy N. T.,Wilkins, Alistair L.,Thomson, Ralph, A.
, p. 2051 - 2056 (2007/10/02)
The absolute configurations at C-20 of the (R)- and (S)-aldehydes (10a), (10b), alcohols (11a), (11b), (13a), and (13b) and acids (12a), (12b), (14a), and (14b) derived from 3β-acetoxylup-20(29)-ene (8), via the epoxide (7), have been established by a combination of physical, spectral and X-ray crystallographic procedures, as have the configurations at C-20 of the (R)- and (S)-3β-acetoxy- and 3β-hydroxy-30-norlupan-20-ols (20a), (20b) and (21a), (21b).Anomalies in the literature are identified and rationalized.
