title: 1,1,2-triphenylbut-1-enes: relationship between structure, estradiol receptor affinity, and mammary tumor inhibiting properties.
abstract: 1,1,2-Triphenylbut-1-enes, which are substituted with acetoxy groups on one, two, or three aromatic rings in the para and/or meta positions, were synthesized. The identity of the occurring E and Z isomers were established by 1H NMR spectroscopy. A study on structure-activity relationships was carried out with regard to estradiol receptor affinity and to inhibiting effects on the growth of a postmenopausal human mammary carcinoma implanted in nude mice. The para-substituted compounds generally exhibited a higher receptor affinity and a better antitumor activity than the corresponding meta-substituted ones. The E isomers were superior to the respective Z isomers in those two properties. The tumor-inhibiting effect of the mono- and disubstituted compounds was better than that of the trisubstituted ones. Except for the trisubstituted compounds, they all show a good correlation between estradiol receptor affinity and antitumor activity. One of the compounds was also tested on the 9,10-dimethylbenz[a]-anthracene-induced, hormone-dependent mammary carcinoma of the Sprague-Dawley rat, and the results corresponded to those obtained in the xenograft tumor.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000633:toxicity; D000475:Alkenes / Q000138:chemical synthesis* / Q000494:pharmacology; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D005260:Female; D066298:In Vitro Techniques; D008325:Mammary Neoplasms, Experimental / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D051381:Rats; D011959:Receptors, Estradiol; D011960:Receptors, Estrogen / Q000378:metabolism*; D013329:Structure-Activity Relationship; D013997:Time Factors
chemical_list: D000475:Alkenes; D000970:Antineoplastic Agents; D011959:Receptors, Estradiol; D011960:Receptors, Estrogen; D015127:9,10-Dimethyl-1,2-benzanthracene; C035804:1,1,2-triphenylbut-1-ene