title: N,N'-Dialkylbis(dichlorophenyl)ethylenediamines and -imidazolidines: relationship between structure and estradiol receptor affinity.
abstract: Diastereomeric N,N'-dialkylbis(dichlorophenyl)ethylenediamines and the corresponding imidazolidines with chlorine in the 2,4, 2,6, 3,4, and 3,5 positions were synthesized. Only the stereoisomers of the 2,6-dichloro-substituted compounds exhibit for N-CH3 (2e, 3e), N-C2H5 (2f, 3f), and N-C3H7 (2g, 3g) an affinity to the estradiol receptor (Ka values ranging from 9.1 X 10(4) to 9.1 X 10(6)), because the nitrogen atoms are shielded by the ortho-located chlorine atoms; therefore, a binding interaction with hydrophobic receptor areas is possible. These substances show weak uterotrophic activity and no significant effect on the growth of the DMBA-induced hormone-dependent mammary adenocarcinoma of the rat.
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents; D055598:Chemical Phenomena; D002621:Chemistry; D005029:Ethylenediamines / Q000138:chemical synthesis* / Q000494:pharmacology; D005260:Female; D008325:Mammary Neoplasms, Experimental / Q000188:drug therapy; D051379:Mice; D009929:Organ Size / Q000187:drug effects; D011960:Receptors, Estrogen / Q000378:metabolism*; D013329:Structure-Activity Relationship; D014599:Uterus / Q000254:growth & development
chemical_list: D000970:Antineoplastic Agents; D005029:Ethylenediamines; D011960:Receptors, Estrogen