N<sup>6</sup>,C8-Disubstituted Adenosine Derivatives as Partial Agonists for Adenosine A<sub>1</sub> Receptors
作者:Harlof Roelen、Nora Veldman、Anthony L. Spek、Jacobien von Frijtag Drabbe Künzel、Ron A. A. Mathôt、Ad P. IJzerman
DOI:10.1021/jm950267m
日期:1996.1.1
The synthesis and biological evaluation of N6, C8-disubstituted derivatives of adenosine as potential partial agonists for adenosine receptors is described. Via three routes, two series of compounds were prepared, viz., N6-cyclopentyladenosine derivatives 3a-e and C8-(cyclopentylamino)adenosine analogs 3e and 9a-d, respectively. The X-ray structure determination of one of these compounds, N6-ethyl
描述了腺苷的N6,C8-二取代衍生物作为腺苷受体潜在的部分激动剂的合成和生物学评估。通过三种途径,制备了两个系列的化合物,即N6-环戊基腺苷衍生物3a-e和C8-(环戊基氨基)腺苷类似物3e和9a-d。对其中一种化合物N6-乙基-8(环戊基氨基)腺苷(9b)进行了X射线结构测定(正交晶系,空间群P2(1)2(1)2(1)(第19号))其中a = 11.039(3),b = 8.708(2)和c = 24.815(12)埃,Z = 4,R1 = 0.0974,R2(W)= 0.2455)。由于分子内氢键,该化合物的核糖部分处于反构象。在放射配体结合研究中对化合物进行了体外测试,得出了它们对A1和A2a腺苷受体的亲和力。所有化合物都表现出对A1的选择性,亲和力在高纳摩尔,低微摩尔范围内。在A1受体上,还确定了所谓的GTP位移,即在存在和不存在1 mM GTP的情况下测得的亲和力之间的比率。所有GTP转换(介于1