Antagonists of 5-HT6 receptors. Substituted 3-(phenylsulfonyl)pyrazolo[1,5-a]pyrido[3,4-e]pyrimidines and 3-(phenylsulfonyl)pyrazolo[1,5-a]pyrido[4,3-d]pyrimidines—Synthesis and ‘structure–activity’ relationship
作者:Alexandre V. Ivachtchenko、Elena S. Golovina、Madina G. Kadieva、Volodymyr M. Kysil、Oleg D. Mitkin、Anton A. Vorobiev、Ilya Okun
DOI:10.1016/j.bmcl.2012.05.036
日期:2012.7
Synthesis and biological evaluation of a new series of structurally unrestricted and intramolecular hydrogen bond restricted derivatives of 3-(phenylsulfonyl)pyrazolo[1,5-a]pyrido[3,4-e]pyrimidines (angular tricyclics) and 3-(phenylsulfonyl)pyrazolo[1,5-a]pyrido[4,3-d]pyrimidines (linear tricyclics) are described. Structurally restricted derivatives are highly potent and selective blockers of 5-HT6
一系列新的3-(苯基磺酰基)吡唑并[1,5- a ]吡啶并[3,4- e ]嘧啶(角三环)和3-(苯基磺酰基)的结构不受限制和分子内氢键限制的衍生物的合成及生物学评价描述了吡唑并[1,5- a ]吡啶基[4,3- d ]嘧啶(线性三环)。结构上受限制的衍生物是5-HT 6受体的强效和选择性阻滞剂,三环核的角形或线性形状之间几乎没有差异,角形物质的效力稍强。3-(苯基磺酰基)吡唑并[1,5- a ]吡啶基[3,4- e ]嘧啶的角代表5,可以被认为是用于进一步开发更有利的候选,因为它显示只有弱5-HT 2B阻断活性(IC 50 = 6.16μM与IC相比,50 = 1.8 nM的对5-HT 6个受体)和非常低的hERG钾通道阻断效能(IC 50 = 54.2μM)。线性类似物11较不受欢迎,因为它在高达10μM的浓度下未显示与5-HT 2B受体的结合,但具有相当高的阻断hERG通道的能力(IC