Imidazoline receptors: Qualitative structure-activity relationships and discovery of tracizoline and benazoline. Two ligands with high affinity and unprecedented selectivity
作者:Maria Pigini、Pascal Bousquet、Angelo Carotti、Monique Dontenwill、Mario Giannella、Roberta Moriconi、Alessandro Piergentili、Wilma Quaglia、Seyed K. Tayebati、Livio Brasili
DOI:10.1016/s0968-0896(97)00009-6
日期:1997.5
characterize imidazoline (I) receptors have been carried out with non-selective or poorly selective ligands prompted us to undertaken research aimed at developing selective ligand(s). In previous work using, as a starting point, cirazoline I, a potent alpha 1-adrenergic receptor agonist that also binds to I receptors, we showed that removal of the cyclopropyl ring (2) retains high affinity for I2 receptors
观察到所有表征咪唑啉(I)受体的尝试都是使用非选择性或选择性差的配体进行的,这促使我们进行了旨在开发选择性配体的研究。在以前的研究中,以环丙唑啉I为起点,环丙唑啉I是一种也与I受体结合的有效的α1-肾上腺素能受体激动剂,我们发现环丙基环(2)的去除保留了对I2受体的高亲和力,同时降低了α1-肾上腺素激动剂活性。但是,人们认为这种残留的α1肾上腺素激动剂活性虽然适度,但可能会降低化合物2的效用,我们现在报告我们在这一领域的不断努力。从化合物2开始,我们首先通过等位置换消除了α1-激动剂成分,然后,通过对化合物7的构象限制,成功发现了曲西唑啉(9)和苯并唑啉(12)。这两个新的配体具有高亲和力(分别为pKi值8.74和9.07),并且对alpha 2-(I2 / alpha 2 7,762和18,621)和alpha 1-(I2 / alpha 1 2,344和2,691)肾上腺素能受体具有前