Synthesis and pharmacological characterization at glutamate receptors of erythro- and threo-tricholomic acid and homologues thereof
作者:Paola Conti、Marco De Amici、Gabriella Roda、Andrea Pinto、Lucia Tamborini、Ulf Madsen、Birgitte Nielsen、Hans Bräuner-Osborne、Carlo De Micheli
DOI:10.1016/j.tet.2006.12.066
日期:2007.3
The erythro- and threo-amino-(3′-hydroxy-4′,5′-dihydro-isoxazol-5′-yl)-acetic acids, stereoisomers of tricholomic acid, were synthesized along with the corresponding higher homologues erythro- and threo-amino-(3′-carboxy-4′,5′-dihydro-isoxazol-5′-yl)-acetic acids. The target compounds were prepared via the 1,3-dipolar cycloaddition of a suitable nitrile oxide to (±)-2-tert-butoxycarbonylamino-3-buten-1-ol
所述赤-和苏式-氨基- (3'-羟基-4',5'-二氢-异恶唑-5'-基) -乙酸,tricholomic酸的立体异构体,分别与相应的高级同系物沿着合成赤-和苏-氨基-(3'-羧基-4',5'-二氢-异恶唑-5'-基)-乙酸。通过将合适的腈氧化物与(±)-2-叔丁基的1,3-偶极环加成制备目标化合物-丁氧基羰基氨基-3-丁烯-1-醇。这种策略允许以可比较的量合成两个立体异构氨基酸。通过对大鼠皮膜的受体结合试验,电生理试验和在CHO细胞中表达的克隆受体的第二信使试验,研究了这些化合物对离子型和代谢型谷氨酸受体(iGluR和mGluRs)的药理活性。将它们的药理学特征与1-谷氨酸盐和先前描述的选择性NMDA受体拮抗剂5-(2-氨基-2-羧乙基)-4,5-二氢异恶唑-3-羧酸的药理学特征进行了比较,以强调增加剂量的作用。减小代表两个药效团实体的氨基酸部分和远端酸基团之间的距离。