发现三唑并吡啶GS-458967,一种心脏Na V 1.5通道的晚期钠电流抑制剂(Late I Na i),相对于雷诺嗪具有更高的功效和效能
摘要:
我们从中等通量筛选不含碱性胺基团的杂环化合物开始,以避免hERG和β-受体阻滞剂的活性,并确定[1,2,4]三唑并[4,3- a ]吡啶为早期铅。优化用于晚期I Na电流抑制的取代基和缺乏峰值I Na抑制导致发现4h(GS-458967),相对于雷诺嗪具有更高的抗心律不齐活性。不幸的是,4h证明其对钠同工型(包括中枢神经系统和周围神经系统同工型)的使用依赖性阻滞,与其低治疗指数相符(大鼠约为5倍,狗约为3倍)。复合4h代表我们对第二代Late I Na抑制剂计划的首次尝试,是一种重要的概念验证化合物。我们将在后续交流中提供有关应对CNS挑战的其他报告。
Novel N-substituted mercaptopropanamide derivatives of the formula:
wherein R₁ is mercapto or a group convertible into mercapto when cleaved within the biobody, W is hydrogen atom, an alkyl or an aralkyl, R₂ is an aryl which may optionally have substituent(s), a heterocyclic group which may optionally have substituent(s), or an alkyl which may optionally have substituent(s), X is a cycloalkylene, a cycloalkylidene, or a phenylene which may optionally have substituent(s) or may optionally be fused with other ring, and R₃ is carboxyl or a group convertible into carboxyl when cleaved within the biobody, or a pharmaceutically acceptable salt thereof, and a solid solution of said N-substituted mercaptopropanamide derivative with an amino acid, which have excellent enkephalinase inhibitory activity and are useful for the treatment of mild to moderate pain, and a pharmaceutical composition containing said compounds as an active ingredient, and processes for preparing these compounds.
The azoxy compound lyophyllin (3) is formed in fruit-bodies of the toadstool Lyophyllum connatum by oxidative condensation of N-hydroxy-N'N'-dimethyiurea (2) with N-methylhydroxylamine (4). The condensing enzyme is remarkably unspecific and transforms a variety of hydroxyureas and N-alkyl-hydroxylamines into the corresponding lyophyllin analogues 5. (C) 1997 Elsevier Science Ltd.
CHRISTIE, C. C.;KIRBY, G. W.;MCGUIGAN, H.;MACKINNON, J. W. M., J. CHEM. SOC. PERKIN TRANS., 1985, 1, N 11, 2469-2473
作者:CHRISTIE, C. C.、KIRBY, G. W.、MCGUIGAN, H.、MACKINNON, J. W. M.
DOI:——
日期:——
LACTONE DERIVATIVES OF 17.BETA.-CARBOXY, CARBOTHIO AND AMIDE ANDROSTANE DERIVATIVES
申请人:GLAXO GROUP LIMITED
公开号:EP0876392B1
公开(公告)日:2000-07-05
METHODS FOR ONE-POT N-DEMETHYLATION/N-ACYLATION OF MORPHINE AND TROPANE ALKALOIDS