Studies on Aromatase Inhibitors IV. Synthesis and Biological Evaluation of N,N-Disubstituted-5-aminopyrimidine Derivatives.
作者:Minoru OKADA、Toru YODEN、Eiji KAWAMINAMI、Yosiaki SHIMADA、Masafumi KUDOU、Yasuo ISOMURA
DOI:10.1248/cpb.45.1293
日期:——
In order to study the potency of the 5-aminopyrimidine skeleton as an aromatase inhibitor, we synthesized various N, N-disubstituted-5-aminopyrimidine derivatives and evaluated their aromatase-inhibitory activity (in vitro) and their inhibitory activity on pregnant mare serum gonadotropin (PMSG)-induced estrogen synthesis (in vivo). Compounds with the fluoro-substituted benzyl group showed potent aromatase inhibition. Among them, 5-[(4-cyanophenyl)(3, 5-difluorobenzyl)amino]pyrimidine (5w, YM553) was a highly potent compound with an IC50 value of 0.038nM for aromatase from human placenta. Its inhibitory effect was approximately four times greater than that of YM511. In addition, YM553 was a weak inhibitor of other enzymes involved in steroid hormone synthesis. These results indicate that YM553, as well as YM511 (a 4-amino-4H-1, 2, 4-triazole derivative), is a promising agent for the treatment of estrogen-dependent diseases.
为了研究5-氨基嘧啶骨架作为芳香化酶抑制剂的效能,我们合成了多种N,N-二取代-5-氨基嘧啶衍生物,并评估了它们的芳香化酶抑制活性(体外)以及对孕马血清促性腺激素(PMSG)诱导雌激素合成的抑制活性(体内)。具有氟取代苄基的化合物显示出强效的芳香化酶抑制作用。其中,5-[(4-氰基苯基)(3,5-二氟苄基)氨基]嘧啶(5w,YM553)是一种高效的化合物,针对人胎盘芳香化酶的IC50值为0.038nM。其抑制效果约为YM511的四倍。此外,YM553对其他参与类固醇激素合成的酶仅表现出较弱的抑制作用。这些结果表明,YM553以及YM511(4-氨基-4H-1,2,4-三唑衍生物)是治疗依赖雌激素疾病的有希望的药物。