Synthesis and biological evaluation of steroidal derivatives bearing a small ring as vitamin D receptor agonists
作者:Norihito Arichi、Shinichi Fujiwara、Michiyasu Ishizawa、Makoto Makishima、Duy H. Hua、Ken-ichi Yamada、Yousuke Yamaoka、Kiyosei Takasu
DOI:10.1016/j.bmcl.2017.05.089
日期:2017.8
A novel series of 3-ketolithocholic acid derivatives as well as estrone derivatives bearing a small ring for the conformational fixation of the side chain were synthesized by using a catalytic [2+2] cycloaddition and a ring-contraction rearrangement. The steroidal derivatives were evaluated for transcriptional activation of vitamin D receptor by luciferase reporter assays. Among them, two estrone derivatives