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Acta Crystallogr E Crystallogr Commun
; 80(Pt 8): 857-862, 2024 Aug 01.
Article
in English
| MEDLINE
| ID: mdl-39108782
ABSTRACT
The X-ray crystal structure data of 12-α-fluoro-3ß-hy-droxy-olean-28,13ß-olide methanol hemisolvate, 2C30H47FO3·CH3OH, (1), and 12-α-fluoro-3ß-hy-droxy-taraxer-28,14ß-olide methanol hemisolvate, 2C30H47FO3·CH3OH, (2), are described. The fluoro-lactonization of oleanolic acid using SelectfluorTM yielded a mixture of the six-membered δ-lactone (1) and the unusual seven-membered γ-lactone (2) following a 1,2-shift of methyl C-27 from C-14 to C-13.