Discovery of 7-arylsulfonyl-1,2,3,4, 4a,9a-hexahydro-benzo[4,5]furo[2,3-c]pyridines: Identification of a potent and selective 5-HT6 receptor antagonist showing activity in rat social recognition test
作者:Rabindranath Tripathy、Robert J. McHugh、Edward R. Bacon、Joseph M. Salvino、George C. Morton、Lisa D. Aimone、Zeck Huang、Joanne R. Mathiasen、Amy DiCamillo、Mark J. Huffman、Beth A. McKenna、Karla Kopec、Lily D. Lu、Jie Qian、Thelma S. Angeles、Thomas Connors、Chrysanthe Spais、Beverly Holskin、Emir Duzic、Hervé Schaffhauser、Gerard C. Rossé
DOI:10.1016/j.bmcl.2011.12.026
日期:2012.2
distal aryl group are important for enhancing activity against 5-HT6. Separation of enantiomers and subsequent optimization and SAR with bis substituted phenyl sulfone provided potent 5-HT6 antagonists with improved PK profiles in rat. A potent, selective 5-HT6R antagonist (15k) was identified from this study which showed good oral bioavailability (F = 39%) in rat with brain penetration (B/P = 2.76) and
血清素能神经传递与学习和记忆的调节有关。已经证明5-羟基色胺6(5-HT 6)受体拮抗剂在几种动物模型中对认知表现出有益的作用。基于文献报道的药效团模型,我们设计并成功鉴定了7-苯磺酰基-1,2,3,4-四氢-苯并[4,5]呋喃[2,3- c ]吡啶(3a)支架作为一类新型的5-HT 6受体拮抗剂。尽管对5-HT 6受体,3a具有良好的活性在小鼠,大鼠和狗中表现出差的肝微粒体稳定性。证明了3a的四氢吡啶环的双键的饱和增强了代谢稳定性。但是,所得化合物4a(7-苯基磺酰基-1,2,3,4,4a,9a-六氢-苯并[4,5]呋喃[2,3 - c ]吡啶-HCl盐)损失约30倍。以及引入两个手性中心。在我们针对该系列的优化过程中,我们发现末端芳基上2或3位的取代基对于增强针对5-HT 6的活性很重要。对映异构体的分离以及随后的优化和双取代苯基砜的SAR可提供有效的5-HT 6在大鼠中具有改善的PK