title: A new class of nonhormonal pregnancy-terminating agents. Synthesis and contragestational activity of 3,5-diaryl-s-triazoles.
abstract: A series of 3,5-diaryl-s-triazoles were synthesized and evaluated as postimplantation contragestational agents. The introduction of various substituents (e.g., an o-alkyl chain on one phenyl and a m-alkoxy group on the other) was found to increase the potency. Several compounds with very high pregnancy-terminating activity in both hamsters and rats were obtained. One of these, 3-(2-ethylphenyl)-5-(3-methoxyphenyl)-s-triazole, DL 111 (36), was selected for detailed evaluation in various animal species. A synthetic scheme for the preparation of these compounds and preliminary structure-activity relationships are presented.
mesh_terms: D000019:Abortifacient Agents / Q000138:chemical synthesis*; D000020:Abortifacient Agents, Nonsteroidal / Q000138:chemical synthesis*; D000818:Animals; D006224:Cricetinae; D005260:Female; D011247:Pregnancy; D051381:Rats; D013329:Structure-Activity Relationship; D014230:Triazoles / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000019:Abortifacient Agents; D000020:Abortifacient Agents, Nonsteroidal; D014230:Triazoles; C030266:3-(2-ethylphenyl)-5-(3-methoxyphenyl)-1H-1,2,4-triazole