A revisitation of the clemmensen reduction of diosgenin. characterization of byproducts and their use in the preparation of (25R)-26-hydroxysterols.
作者:Yuan Ni、Hong-Seok Kim、K. William、Wilson Alemka Kisic、George J. Schroepfer
DOI:10.1016/s0040-4039(00)79201-x
日期:1993.6
Four major byproducts of the Clemmensenreduction of diosgenin have been isolated and identified: (25R)-17 β-methyl-18-nor-17α-cholesta-5,13-diene-3 β,26-diol, dihydrodiosgenin, (22E,25R)-cholesta-5,22-diene-3 β,16β,26-triol, and its 22Z isomer. These byproducts were used to prepare deuterium- and tritium-labeled (25R)-26-hydroxycholesteroi (3) and Δ22 analogs of 3.