Potential bile acid metabolites. 19. The epimeric 3α,6,7β-trihydroxy-and 3α,6,7β,12α-tetrahydroxy-5α-cholanoic acids
作者:Takashi Iida、Shinji Nishida、Frederic C. Chang、Toshifumi Niwa、Junichi Goto、Toshio Nambara
DOI:10.1016/0039-128x(93)90061-q
日期:1993.4
beta- and 3 alpha,6 beta,7 beta-trihydroxy-5 alpha-cholanoic acids, and of the once-reported analog 3 alpha,6 alpha,7 beta,12 alpha-, as well as the new 3 alpha,6 beta,7 beta,12 alpha-tetrahydroxy-5 alpha-cholanoic acids, are described. Key intermediates of the syntheses are the 6-oxo-7 beta-ols of the respective 5 alpha-cholanoic acids (and their methyl esters) prepared by allomerization at C-5 of