New bile alcohols—synthesis of (22R)- and (22S)-5β-cholestane-3α,7α,12α,22,25-pentols 1,2
作者:Kihira Kenji、Kuramoto Taiju、Hoshita Takahiko
DOI:10.1016/0039-128x(76)90058-1
日期:1976.3
Abstract The synthesis of (22R)- and (22S)-5β-cholestane-3α,7α, 12α,22,25-pentols is described. Bisnorcholyl aldehyde was prepared from cholic acid and converted into the cholestanepentols by a Grignard reaction with 3-methyl-3-(tetrahydropyran-2-yloxy)-butynylmagnesium bromide followed by hydrogenation and acid hydrolysis. One of the synthetic pentols, the 22R-isomer was identical with a metabolite