Retinobenzoic Acids. 6. Retinoid Antagonists with a Heterocyclic Ring
作者:Laurence Eyrolles、Hiroyuki Kagechika、Emiko Kawachi、Hiroshi Fukasawa、Tohru Iijima、Youko Matsushima、Yuichi Hashimoto、Koichi Shudo
DOI:10.1021/jm00036a017
日期:1994.5
Several candidate retinoid antagonists were designed on the basis of the ligand superfamily concept and synthesized. Retinoidal activities of these benzimidazole and benzodiazepine derivatives were examined by assay of differentiation-inducing activity on human promyelocytic leukemia cell line HL-60. The parent benzimidazole derivative, 4-(5,6,7,8-tetrahydro-5,5,8,8-tetramethylnapth[2,3-d]imidazol-2-yl)benzoic acid (7a), and related compounds with a small alkyl group instead of the hydrogen on the nitrogen (N-1) atom of the imidazole ring exhibited retinoidal activity, and the potency strongly depended on the bulkiness of the substituent. The compounds having a phenyl or benzyl group on the nitrogen lacked differentiation-inducing activity on HL-60 cells and acted as antagonists to the potent retinoid 4-[(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-napthalenyl)carbamoyl]benzoic acid (Am80). Among the compounds possessing a seven-membered heterocyclic ring as a linking group, 4-(5H-7,8,9,10-tetrahydro-5,7,7,10,10-pentamethylbenzo[e]naphtho[2,3-b][1,4]diazepin-13-yl)benzoic acid (16) also exhibited the antagonistic activity. The binding abilities of these compounds to retinoic acid receptors ct and P were consistent with their potency for the inhibition of HL-60 cell differentiation induced by the retinoid Am80.