1624-73-3Relevant articles and documents
New estrogen receptor antagonists. 3,20-Dihydroxy-19-norpregna-1,3,5(10)-trienes: Synthesis, molecular modeling, and biological evaluation
Kuznetsov, Yury V.,Levina, Inna S.,Scherbakov, Alexander M.,Andreeva, Olga E.,Fedyushkina, Irina V.,Dmitrenok, Andrey S.,Shashkov, Alexander S.,Zavarzin, Igor V.
, p. 670 - 682 (2018)
New estrogen receptor α (ERα) antagonists – 3,20-dihydroxy-19-norpregna-1,3,5(10)-trienes containing an additional carbocyclic ring D′ at the 16α,17α positions – were synthesized. The effects of the new compounds on the MCF-7 breast cancer cells and ERα activation were investigated. All the steroids studied were synthesized starting from estrone methyl ether. The scaffold of compounds containing the six-membered ring D′ was constructed via the Diels–Alder reaction of butadiene with 3-methoxy-19-norpregna-1,3,5(10),16-tetraen-20-one 5. The hydrogenation of primary 16α,17α-cyclohexeno-adduct 7 followed by 3-demethylation (by HBr–AcOH) and reduction of 20-oxo group (by LiAlH4) or in one step by DIBAH gave target mono- and dihydroxy steroids 9–11. The Corey–Chaykovsky reaction of the same 3-methoxy-19-norpregna-1,3,5(10),16-tetraen-20-one 5 gave 16α,17α-methylene-substituted compound. The reaction of the latter with DIBAH immediately yielded 3,20-dihydroxy-16α,17α-methyleno-19-norpregna-1,3,5(10)-triene 13. The same procedures using 3-methoxy-19-norpregna-1,3,5(10),16-tetraen-20-one 5 produced corresponding 3,20-dihydroxy-16,17-19-norpregna-1,3,5(10)-triene 16 and 3,20-dihydroxy-19-norpregna-1,3,5(10),16-tetraene 17. All compounds were fully characterized by 1D and 2D NMR, HRMS, and X-ray diffraction. The molecular docking showed that the target compounds can bind to ER, their binding mode being similar to that of natural estradiol. 16α,17α-Methylene- or unsubstituted compounds exhibit the highest cytotoxicity against MCF-7 cells, being simultaneously relatively weak ERα inhibitors. 3,20-Dihydroxy steroids containing the six-membered ring D′ proved to be the most effective ERα inhibitors. These compounds displayed moderate cytotoxicity comparable of that of tamoxifen and showed no toxic effect on MCF-10A normal, nontumorigenic epithelial cells. The new ER antagonists were found to be good candidates for further testing as agents for the treatment and prevention of ERα-positive breast cancers.
Synthesis of novel estrone analogs by incorporation of thiophenols via conjugate addition to an enone side chain
Kopel, Lucas C.,Ahmed, Mahmoud S.,Halaweish, Fathi T.
, p. 1119 - 1125 (2013/10/08)
Functionalized estrogen analogs have received interest due to their unique and differing biological activity compared to their parent compounds. The synthesis of a new class of 3-methoxyestrone analogs functionalized at the C17 position possessing both alkyl and aryl substituted α,β-unsaturated ketones is described, along with their thiophenol conjugate addition products.
17β-acyl-17α-propynyl-11β-arylsteroids and their derivatives having agonist or antagonist hormonal properties
-
, (2008/06/13)
The invention is directed to a novel class of 17β-acyl-17β-propynyl steroids which exhibit potent antiprogestational activity.
