2 H-N.m.r. analysis of (2 S, 3 R)-2-([2H2]methyl)-[1,1,1,2-2H4]pentan-3-ol obtained from [2H22]poriferasterol, biosynthesized in the Chrysophyte Ochromonas malhamensis from C2H3CO2Na, shows that the hydride migration from C-24 to C-25 occurs on the si-face of the Δ24-precursor double bond.
F. Nicotra, F. Ronchetti, G. Russo, L. Toma, P. Gariboldi and B. M. Ranzi, J. Chem. Soc., Chem. Commun., 1984, 383 DOI: 10.1039/C39840000383
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