N. Ikekawa, STEREOCHEMISTRY AND PHYSIOLOGICAL SIGNIFICANCE OF HYDROXYLATION OF VITAMIN-D SIDE-CHAIN, Bioorganic & medicinal chemistry letters, 3(9), 1993, pp. 1789-1794
Stereochemical aspect of side chain hydroxylation (C-23, C-24, and/or
C-26 positions) of vitamin D3 is described. The effect of the configur
ation of hydroxy group on biological activities is emphasized. Stereoc
hemistry of vitamin D hydroxylation is compared with that of other nat
ural hydroxylated steroids. Conformation of steroid side chain is also
discussed