Inhibition of Cyclic Nucleotide Phosphodiesterase by Derivatives of 1,3-Bis(cyclopropylmethyl)xanthine
作者:Derek R. Buckle、Jonathan R. S. Arch、Brendan J. Connolly、Ashley E. Fenwick、Keith A. Foster、Kenneth J. Murray、Simon A. Readshaw、Mark Smallridge、David G. Smith
DOI:10.1021/jm00030a007
日期:1994.2
substituted derivatives 2-9, which showed varying selectivities for the PDE type IV isoenzyme relative to PDE Va. The 4-methoxybenzyl derivative 6 in particular was a highly potent PDE Va inhibitor (IC50 0.14 microM) and showed a 24-fold selectivity for this isoenzyme relative to PDE IV. Sulfonation of 1 was more complex, with the product profile being highly dependent on the reaction conditions. As
选择性IV型磷酸二酯酶抑制剂8-氨基-1,3-双(环丙基甲基)-黄嘌呤(1,BRL 61063)的烷基化仅导致N-7取代的衍生物2-9表现出对PDE的不同选择性相对于PDE IV的IV型同工酶。特别是4-甲氧基苄基衍生物6是高效PDE Va抑制剂(IC50为0.14 microM),并且相对于PDE IV表现出24倍的选择性。1的磺化更为复杂,产物分布高度依赖于反应条件。与烷基化一样,在N-7处进行磺化通常会提高抗PDE Va的能力,尤其是在缺少强吸电子取代基的含芳基的部分中(12、15-17、19)。环氨基上的双芳基磺化通常会降低对PDE IV和Va的抑制能力。由1与N-甲基吡咯烷酮在苯磺酰氯存在下的异常反应形成的8 ami基化合物33对PDE Va的IC50值为0.05 microM,据信是报道的最有效的同工酶抑制剂。没有证明PDE IV抑制与[3H]咯利普兰从其高亲和力结合位点的置换