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The X-ray crystal structure data of 12-α-fluoro-3β-hy­droxy­olean-28,13β-olide methanol hemisolvate, 2C30H47FO3·CH3OH, (1), and 12-α-fluoro-3β-hy­droxy­taraxer-28,14β-olide methanol hemisolvate, 2C30H47FO3·CH3OH, (2), are described. The fluoro­lactonization 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. [ABSTRACT FROM AUTHOR]

The X-ray crystal structure data of 12-α-fluoro-3β-hy-droxy-olean-28,13β-olide methanol hemisolvate, 2C 30 H 47 FO 3 ·CH 3 OH, ( 1 ), and 12-α-fluoro-3β-hy-droxy-taraxer-28,14β-olide methanol hemisolvate, 2C 30 H 47 FO 3 ·CH 3 OH, ( 2 ), are described. The fluoro-lactonization of oleanolic acid using Selectfluor TM 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., (© Eadsforth et al. 2024.)