Cyclopropane-Based Conformational Restriction of Histamine. (1<i>S</i>,2<i>S</i>)-2-(2-Aminoethyl)-1-(1<i>H</i>-imidazol-4-yl)cyclopropane, a Highly Selective Agonist for the Histamine H<sub>3</sub> Receptor, Having a <i>cis</i>-Cyclopropane Structure
作者:Yuji Kazuta、Kazufumi Hirano、Kentaro Natsume、Shizuo Yamada、Ryohei Kimura、Shun-ichiro Matsumoto、Kiyoshi Furuichi、Akira Matsuda、Satoshi Shuto
DOI:10.1021/jm020415q
日期:2003.5.1
cyclopropane units, (1S,2R)- and (1R,2R)-2-(tert-butyldiphenylsilyloxy)methyl-1-formylcyclopropane (14 and 15, respectively) or their enantiomers ent-14 and ent-15. Among the conformationally restricted analogues, the "folded" analogue 13 (AEIC) having the cis-cyclopropane structure was identified as a potent H(3) receptor agonist, which showed a significant binding affinity (K(i) = 1.31 +/- 0.16 nM) and had
组胺的一系列基于环丙烷的构象受限类似物,即“折叠的”顺式类似物,即(1S,2R)-2-(氨基甲基)-1-(1H-咪唑-4-基)环丙烷(11), (1S,2S)-2-(2-氨基乙基)-1-(1H-咪唑-4-基)环丙烷(13)及其对映异构体ent-11和ent-13,以及“扩展的”反式类似物,即,将(1R,2R)-2-(氨基甲基)-1-(1H-咪唑-4-基)环丙烷(12)及其对映体ent-12设计为组胺H(3)受体激动剂。这些目标化合物是由通用的手性环丙烷单元(1S,2R)-和(1R,2R)-2-(叔丁基二苯基甲硅烷氧基)甲基-1-甲酰基环丙烷(分别为14和15)或其对映体ent-14合成的和ent-15。在受构象限制的类似物中,“折叠的” 具有顺式环丙烷结构的类似物13(AEIC)被确定为有效的H(3)受体激动剂,它显示出显着的结合亲和力(K(i)= 1.31 +/- 0.16 nM),并具有激动作用(EC(