Efficient Process for Preparing Steroids and Vitamin D Derivatives With the Unnatural Configuration at C20 (20 Alpha-Methyl) from Pregnenolone
申请人:Bridges Alexander James
公开号:US20080171728A1
公开(公告)日:2008-07-17
Disclosed herein are methods for preparing steroids and Vitamin D derivatives having the unnatural beta (usually S) configuration at C20, the methods comprising the use of compounds of the formula:
wherein R is as defined herein. Also disclosed are steroids and Vitamin D derivatives made using the methods disclosed herein and pharmaceutical compositions comprising said steroids and Vitamin D derivatives.