METHOD FOR PREPARING 26,26,26,27,27,27-HEXAFLUORO-1A,25- DIHYDROXYCHOLESTEROL

摘要

This invention provides a new method for preparing 26,26,26,27,27,27-hexafluoro-1,25-dihydroxycholesterol. The method permits the use of cholenic acid or an ester of cholenic acid as the starting material and the preparation of a compound which can be readily converted into a highly active derivative of vitamin D, 26,26,26,27,27,27-hexafluoro-1 alpha ,25-dihydroxycholecalciferol.