Stereochemical Diversity-Oriented Conformational Restriction Strategy. Development of Potent Histamine H<sub>3</sub> and/or H<sub>4</sub> Receptor Antagonists with an Imidazolylcyclopropane Structure
作者:Mizuki Watanabe、Yuji Kazuta、Hideki Hayashi、Shizuo Yamada、Akira Matsuda、Satoshi Shuto
DOI:10.1021/jm0603318
日期:2006.9.1
potent H3 and H4 receptor antagonists, a series of conformationally restricted analogues of histamine with a chiral cis- or trans-cyclopropane structure were designed on the basis of this strategy. These target compounds with stereochemical diversity were synthesized from the versatile chiral cyclopropane units (1S,2R)- and (1R,2R)-2-(tert-butyldiphenylsilyloxy)methyl-1-formylcyclopropane (6 and 7, respectively)
面向立体化学多样性的构象限制策略可以是开发药物靶蛋白特异性配体的有效方法,尤其是在既不知道生物活性构象也不知道药效基团的情况下。为了开发有效的H3和H4受体拮抗剂,在该策略的基础上设计了一系列具有手性顺式或反式环丙烷结构的组胺构象受限的类似物。这些具有立体化学多样性的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6和7)或其对映异构体合成的-6和ent-7。这些构象受限的类似物的药理学谱显示根据环丙烷骨架的不同而不同。在类似物中,具有(1R)-反式-环丙烷结构的(1R,2S)-2- [2-(4-氯苄氨基)乙基] -1-(1H-咪唑-4-基)环丙烷(11a)具有显着性。对H3(Ki = 8.4 nM)和H4(Ki = 7.6 nM)受体的拮抗活性。具有(1S)-反式-环丙烷结构的11a对映体(即ent-11a)