FTIR spectral study of intramolecular hydrogen bonding in thromboxane A2 receptor antagonist S-145 and related compounds. 3. Conformation and activity of S-145 analogs
作者:Mamoru Takasuka、Masumi Yamakawa、Mitsuaki Ohtani
DOI:10.1021/jm00110a020
日期:1991.6
heptenoic acid, its chain analogues HO2C(CH2)nNHSO2Ph (n = 3-8, 10, and 11) 1-8, and (5Z)-9-(phenylsulfonyl) aminonon-5-enoic acid (9) were synthesized in order to elucidate the dependence of the conformation in solution and of the pharmacological activity on the side-chain length. Their FTIR spectra were measured in dilute CCl4 solution. For these compounds, intramolecular hydrogen bonds similar to those
S-145,(+/-)-(5Z)-7- [3-endo-[(苯磺酰基)氨基]双环[2.2.1]庚烯酸,其链类似物HO2C(CH2)nNHSO2Ph(n = 3-8 ,10和11)1-8和(5Z)-9-(苯磺酰基)氨基壬基5-烯酸(9)的合成是为了阐明溶液中的构象和药理活性对侧面的依赖性-链长。在稀释的CCl4溶液中测量其FTIR光谱。对于这些化合物,在羧基和磺酰胺基之间发现了类似于对S-145观察到的分子内氢键。分子内氢键分子的百分数(rho)与n值之间也发现线性关系。在体外检查了化合物1-9对兔和大鼠洗涤的血小板(WP)的U-46619抑制浓度(IC50)和胶原蛋白诱导的聚集,和U-46619诱导的大鼠主动脉收缩。尽管rho值与n值成正比,但三种TXA2受体拮抗效力[log(1 / IC50)]与n值呈抛物线相关性。发现6(n = 8)的log(1 / IC50)值与S-145观察到的类