.beta.-Adrenoceptor activity of the stereoisomers of the bufuralol alcohol and ketone metabolites
作者:Peter J. Machin、David N. Hurst、John M. Osbond
DOI:10.1021/jm00149a018
日期:1985.11
Partial beta 1-agonist activity was associated not only with all the stereoisomers with the S configuration hydroxylamine side chain but also with some of the R configuration derivatives, especially (R)-ketone 3b. The results suggest that the margin of difference in beta-adrenoceptor activity between compounds epimeric at the hydroxylamine side chain can be significantly influenced by a suitable substituent
2-[(叔丁基氨基)甲基] -7-甲基-2,7-苯并呋喃二甲醇(2)和2- [2-(叔丁基氨基)-1-羟乙基] -7-苯并呋喃基甲基酮(3 ),丁富洛尔的醇和酮代谢物已制备并检查了大鼠的β-肾上腺素受体活性。具有S构型羟胺侧链的所有立体异构体均显示出与(S)-丁三醇(1a)相当的有效β2-拮抗剂活性。相比之下,在β1受体上观察到了广泛的拮抗剂效价。只有醇非对映异构体9a比1a更具活性。这表明在这些苯并呋喃中7-取代基的形状对与β1-受体的相互作用程度的影响远大于与β2-受体的相互作用程度。部分β1-激动剂活性不仅与具有S构型羟胺侧链的所有立体异构体有关,而且与某些R构型衍生物,特别是(R)-酮3b有关。结果表明,在芳胺核中合适的取代基可以显着影响羟胺侧链上差向异构的化合物之间β-肾上腺素受体活性的差异。