Diels-alder reactions with ethyl 1-benzofuran-3-carboxylates
摘要:
Substituted salicylaldehydes reacted with ethyl diazoacetate to give ethyl 1-benzofuran-3-carboxylates containing various substituents in the aromatic ring. The Diels-Alder reaction of these compounds with Danishefsky's diene was regioselective, and it provided an effective method for the construction of the heterocyclic skeleton of hexahydrodibenzo[b,d]furan-7-one or tetrahydrodibenzo[b,d]furan-7-one. The adducts were found to undergo rearrangement to substituted 4'-hydroxybiphenyl-2-yl methyl carbonates during column chromatography on silica gel.
Diels-alder reactions with ethyl 1-benzofuran-3-carboxylates
作者:A. S. Kil’met’ev、E. E. Shul’ts、M. M. Shakirov、T. V. Rybalova、G. A. Tolstikov
DOI:10.1134/s1070428013060134
日期:2013.6
Substituted salicylaldehydes reacted with ethyl diazoacetate to give ethyl 1-benzofuran-3-carboxylates containing various substituents in the aromatic ring. The Diels-Alder reaction of these compounds with Danishefsky's diene was regioselective, and it provided an effective method for the construction of the heterocyclic skeleton of hexahydrodibenzo[b,d]furan-7-one or tetrahydrodibenzo[b,d]furan-7-one. The adducts were found to undergo rearrangement to substituted 4'-hydroxybiphenyl-2-yl methyl carbonates during column chromatography on silica gel.
Design, Synthesis, and Biological Evaluation of <i>Pierardine</i> Derivatives as Novel Brain-Penetrant and <i>In Vivo</i> Potent NMDAR-GluN2B Antagonists for Ischemic Stroke Treatment
series of structurally novel GluN2B NMDAR antagonists were designed, synthesized, and biologically evaluated as anti-stroke therapeutics by optimizing the chemical structure of Pierardine, the active ingredient of traditional Chinese medicine Dendrobium aphyllum (Roxb.) C. E. Fischer identified via in silico screening. The systematic structure–activity relationship study led to the discovery of 58 with
通过优化皮拉定(Pierardine)的化学结构,设计、合成了一系列结构新颖的 GluN2B NMDAR 拮抗剂,并对其作为抗中风疗法进行了生物学评估。皮拉定是中药石斛兰(Roxb.)CE Fischer通过计算机筛选鉴定出的活性成分。系统的构效关系研究发现了58 个具有前景的 NMDAR-GluN2B 结合亲和力和拮抗活性。在两种对映体中, S -58在膜片钳测定中对 GluN1/GluN2B 受体介导的电流表现出显着的抑制作用 (IC 50 = 74.01 ± 12.03 nM)。此外,它比其他亚型和脱靶受体表现出良好的特异性。在体内, S -58 的治疗效果与已批准的 GluN2B NMDAR 拮抗剂艾芬地尔相当,并且具有出色的安全性。除了具有吸引力的体外和体内功效外, S -58还表现出出色的脑暴露能力。鉴于这些优点, S -58作为潜在的抗中风候选药物已进入进一步的临床前研究。