Abstract
1. 3α, 7α, 12α-Trihydroxycholanic aldehyde was synthesized by lead tetraacetate oxidation of 3α, 7α, 12α, 24_??_, 25-pentahydroxy-homocholane which was prepared from 3α, 7α, 12α-trifor moxy-25-ace toxy-24-oxo-homo ch olane.
2. 3α, 7α, 12α-Trihydroxycholanic alde-hyde was oxidized to cholic acid by rat liver homogenate.
The author wishes to thank prof. T. Kazuno and Assist. Prof. K. Okuda for their helpful suggestions throguhout this work.
