The Lateral Metalation of Isoxazolo[3,4-d]pyridazinones towards Hit-to-Lead Development of Selective Positive Modulators of Metabotropic Glutamate Receptors
作者:Christina A. Gates、Donald S. Backos、Philip Reigan、Nicholas R. Natale
DOI:10.3390/molecules28196800
日期:——
Isoxazolo[3,4-d] pyridazinones ([3,4-d]s) were previously shown to have selective positive modulation at the metabotropic glutamate receptor (mGluR) Subtypes 2 and 4, with no functional cross-reactivity at mGluR1a, mGluR5, or mGluR8. Additional analogs were prepared to access more of the allosteric pocket and achieve higher binding affinity, as suggested by homology modeling. Two different sets of
异恶唑并[3,4-d]哒嗪酮 ([3,4-d]s) 先前已被证明对代谢型谷氨酸受体 (mGluR) 亚型 2 和 4 具有选择性正向调节作用,而与 mGluR1a、mGluR5 没有功能性交叉反应,或 mGluR8。正如同源模型所表明的,制备了额外的类似物以进入更多的变构口袋并实现更高的结合亲和力。生成了两组不同的类似物。一种使用完全形成的[3,4-d]和带有或不带有卤素的N6-芳基。它们在异恶唑的 C3 处成功进行了选择性横向金属化和亲电猝灭 (LM&EQ)。在第二组类似物中,通过 4-苯乙酰基-3-乙氧羰基-5-甲基异恶唑与相应的肼缩合,在 [3,4-d] 环的 C4 位引入苯基,生成 3 ,4-ds 2b 和 2j 至 2n。