SYNTHESES OF c (-AND P-DIMERS OF LITHOCHOLIC ACID ESTERS cholanoate (5), 3P- alcohol6, and P-dimer 7 are listed in Table 1. From this table, we can see: 1) the equatorial hydrogen geminal to the 3P-OH has higher chemical shift value than the axial hydrogen geminal to the 3a-OH. 2) Conversion of the 3-alcohol to the 3-ester results in a deshielding of the geminal 3-hydrogen. 3) The axial 3P-hydrogen gives a multiplet, and the equatorial ...
