11beta-short chain substituted estradiol analogs and their use in the treatment of menopausal symptoms and estrogen sensitive cancer
申请人:YALE UNIVERSITY
公开号:US20040142915A1
公开(公告)日:2004-07-22
The present invention relates to novel 11-&bgr; estradiol ester compounds and their use as locally active estrogens in the treatment of the symptomology of menopause and to treat estrogen sensitive cancers, including breast cancer.
Nonpolar and Short Side Chain Groups at C-11β of Estradiol Result in Antiestrogens
作者:Jing-xin Zhang、David C. Labaree、Richard B. Hochberg
DOI:10.1021/jm049352x
日期:2005.3.1
We have previously found that esters of 11beta-estradiol carboxylates are transformed from an estrogen into an antiestrogen when the 11beta-side chain is increased in length from four to five non-hydrogen atoms (n greater than or equal to 5). To understand the structural requirements for this transformation and obtain metabolically stable analogues that are not susceptible to esterase cleavage, we have synthesized other compounds having an 11beta-side chain composed of other functional groups: ketones, amides, ethers, and thiono esters. With the exception of amides, which bind poorly to the estrogen receptor (ER), all of these compounds exhibit antiestrogenic action when the side chain length is n greater than or equal to 5. Ethers (n greater than or equal to 5), studied in more detail, inhibit the action of estradiol with either ERalpha or ERbeta. In rat uteri they are estrogen antagonists/weak agonists and decrease the concentration of cholesterol in blood (an hepatic estrogenic action). Thus, these short chain and nonpolar 11beta-analogues of estradiol have tissue specific antiestrogenic/estrogenic actions, characteristics of selective estrogen receptor modulators.
Synthesis of 11β-ether-17α-ethinyl-3,17β-estradiols with strong ER antagonist activities
作者:Jing-Xin Zhang、David C. Labaree、Richard B. Hochberg
DOI:10.1016/j.cclet.2014.01.015
日期:2014.4
strong antagonists for preclinical development, we have synthesized other similar ER ligands with 11 β -ethers and with an additional ethinyl group at the 17α -position in order to slow metabolism of the steroidal moiety. Here we report the synthesis and biological activity of two such compounds (11 β - i -PrO-propyl and 11 β - t -BuO-propyl ethers) with extremely strong antagonist activities.