Investigations on Estrogen Receptor Binding. The Estrogenic, Antiestrogenic, and Cytotoxic Properties of C2-Alkyl-Substituted 1,1-Bis(4-hydroxyphenyl)-2-phenylethenes
摘要:
C2-Alkyl-substituted 1,1-bis(4-hydroxyphenyl)-2-phenylethenes were synthesized and assayed for estrogen receptor binding in a competition experiment with radiolabeled estradiol ([H-3]-E-2) using calf uterine cytosol. The relative binding affinity decreased with the length of the side chain R = H (3a: 35.2%) > Me (3b: 32.1%) > Et (3c: 6.20%); CH2CF3 (3d: 5.95%) > n-Pr (3e: 2.09%) > Bu (3f: 0.62%). Agonistic and antagonistic effects were evaluated in the luciferase assay with MCF-7-2a cells stably transfected with the plasmid ERE(wtc)luc. All compounds showed high antiestrogenic activity without significant agonistic potency. The comparison of the IC50 values for the inhibition of E2 (1 nM) documented the dependence of the antagonistic effects on the kind of the side chain: 3a (IC50 = 150 nM), 3b (IC50 = 30 nM), and 3f (IC50 = 500 nM) were weak antagonists, while 3c (IC50 = 15 nM), 3d (IC50 = 9 nM), and 3e (IC50 = 50 nM) were full antiestrogens and antagonized the effect of E2 completely. The most active compound 3d possessed the same antagonistic potency as 4-hydroxytamoxifen (40HT: IC50 = 7 nM) without bearing a basic side chain. 3d as well as all other 1,1-bis(4-hydroxyphenyl)-2-phenylalkenes were not able to influence the proliferation of hormone dependent MCF-7 cells despite the antagonistic mode of action. In this assay tamoxifen (TAM) and 40HT reduced the cell growth concentration dependent up to T/C-corr = 15% and 25%, respectively.
Iodine-catalyzed Transformation of Aryl-substituted Alcohols Under Solvent-free and Highly Concentrated Reaction Conditions
作者:Marjan Jereb、Dejan Vražič
DOI:10.17344/acsi.2017.3841
日期:2017.12.15
transformations of alcohols under solvent-free reaction conditions (SFRC) and under highly concentrated reaction conditions (HCRC) in the presence of various solvents were studied in order to gain insight into the behavior of the reaction intermediates under these conditions. Dimerization, dehydration and substitution were the three types of transformations observed with benzylic alcohols. Dimerization
The present invention relates to novel triaryl-ethylene derivatives that are useful as anti-neoplastic agents, antiatherosclerotic agents, and hypocholesterolemic agents.
[EN] METHOD OF USING TRIARYL-ETHYLENE DERIVATIVES IN THE TREATMENT AND PREVENTION OF OSTEOPOROSIS<br/>[FR] MODE D'EMPLOI DE DERIVES DU TRIARYL-ETHYLENE POUR LE TRAITEMENT ET LA PREVENTION DE L'OSTEOPOROSE
申请人:HOECHST MARION ROUSSEL, INC.
公开号:WO1996016646A1
公开(公告)日:1996-06-06
(EN) The present invention relates to a method of using triaryl-ethylene derivatives in the treatment or prevention of bone tissue loss or osteoporosis.(FR) Mode d'emploi de dérivés du triaryl-éthylène pour le traitement et la prévention de la raréfaction du tissu osseux ou ostéoporose.