Synthesis and Metabotropic Glutamate Receptor Activity of S-Oxidized Variants of (−)-4-Amino-2-thiabicyclo-[3.1.0]hexane-4,6-dicarboxylate: Identification of Potent, Selective, and Orally Bioavailable Agonists for mGlu2/3 Receptors
作者:James A. Monn、Steven M. Massey、Matthew J. Valli、Steven S. Henry、Gregory A. Stephenson、Mark Bures、Marc Hérin、John Catlow、Deborah Giera、Rebecca A. Wright、Bryan G. Johnson、Sherri L. Andis、Ann Kingston、Darryle D. Schoepp
DOI:10.1021/jm060917u
日期:2007.1.1
(-)-4-Amino-2-thiabicyclo-[3.1.0]hexane-4,6-dicarboxylate (LY389795, (-)-3) is a highly potent and selective agonist of metabotropic glutamate receptors 2 (mGlu2) and 3 (mGlu3). As part of our ongoing research program, we have prepared S-oxidized variants of (-)-3, compounds (-)-10, (+)-11 (LY404040), and (-)-12 (LY404039). Each of these chiral heterobicyclic amino acids displaced specific binding of the mGlu2/3 receptor antagonist H-3-2S-2-amino-2-(1S,2S-2-carboxycycloprop-1-yl)-3-(xanth-9-yl)propanoic acid (H-3-LY341495) from membranes expressing recombinant human mGlu2 or mGlu3 and acted as potent agonists in cells expressing these receptor subtypes. Docking of the most potent of these derivatives, (+)-11, to mGlu2 revealed the possibility of an additional H-bond interaction between the sulfoxide oxygen of (+)-11 with tyrosine residue Y236. Pharmacokinetic analysis of mGlu active enantiomers (+)-11 and (-)-12 in rats showed each to be well absorbed following oral administration. Consistent with their mGlu2/3 agonist potency and pharmacokinetic properties, both (+)-11 and (-)-12 blocked phencyclidine-evoked ambulations in a dose-dependent manner, indicating their potential as nonclassical antipsychotic agents.
(-)-4-氨基-2-硫杂双环-[3.1.0]己烷-4,6-二甲酸酯(LY389795,(-)-3)是一种高度有效且选择性的代谢型谷氨酸受体2(mGlu2)和3(mGlu3)激动剂。作为我们正在进行的研究计划的一部分,我们已经制备了(-)-3的S氧化变体,包括化合物(-)-10、(+)-11(LY404040)和(-)-12(LY404039)。这些手性异环氨基酸中的每一个都能够置换mGlu2/3受体拮抗剂H-3-(2S)-2-氨基-2-(1S,2S-2-羧基环丙-1-基)-3-(番红-9-基)丙酸(H-3-LY341495)的特异性结合,并在表达这些受体亚型的细胞中显示出强效的激动剂作用。将这些衍生物中效果最强的(+)-11与mGlu2进行对接,揭示了(+)-11的亚砜氧与酪氨酸残基Y236之间可能存在额外的氢键相互作用。对活性mGlu对映体(+)-11和(-)-12在大鼠中的药代动力学分析显示,这两种化合物在口服后均被良好吸收。与它们的mGlu2/3激动剂活性和药代动力学特性一致,(+)-11和(-)-12均以剂量依赖性的方式阻断了吩噻嗪引起的活动,表明它们作为非典型抗精神病药物的潜在用途。