Sulfoxide-mediated approach to flavones through one-pot Knoevenagel condensation/oxa-Michael addition/sulfoxide elimination process of β-(o-hydroxyaryl)-ketosulfone with arylaldehydes
gram-scale synthesis of flavones is described by a one-pot straightforward sulfoxide-mediated Knoevenagel condensation/intermolecular oxa-Michael annulation/sulfoxide elimination process of β-(o-hydroxyaryl)-ketosulfones (dual nucleophile) and arylaldehydes (dual electrophile). The expeditious synthetic route sets up flavones, including the bond formation of one CO and one double CC bonds via a formal (5 + 1)
在本文中,通过一锅法直接亚砜介导的 Knoevenagel 缩合/分子间 oxa-Michael 环化/β-(o-羟基芳基)-酮砜(双亲核试剂)和芳基醛(双亲电试剂)。快速合成路线建立了黄酮,包括通过形式 (5 + 1) 环加成形成一个 C O 键和一个双 C C 键。此外,其中,化合物70 亿可能是进一步开发药物以造福抗衰老领域的绝佳起点。
Inhibitory effect of flavonoids on human glutaminyl cyclase
Glutaminyl cyclase (QC) plays an important role in the pathogenesis of Alzheimer's disease (AD) and can be a potential target for the development of novel anti-AD agents. However, the study of QC inhibitors are still less. Here, phenol-4' (R1-), C5-OH (R2-) and C7-OH (R3-) modified apigenin derivatives were synthesized as a new class of human QC (hQC) inhibitors. The efficacy investigation of these compounds was performed by spectrophotometric assessment and the structure-activity relationship (SAR) was evaluated. Molecular docking was also carried out to analyze the binding mode of the synthesized flavonoid to the active site of hQC. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of some novel 4H-benzopyran-4-one derivatives as nonsteroidal antiestrogens
作者:Khadiga Ahmed Ismail、Tarek Abd El Aziem
DOI:10.1016/s0223-5234(01)01218-1
日期:2001.3
The preparation and characterization of some novel 2- and 3-substituted-7-methoxy-4H-1-benzopyran-4-one are presented. The synthesized compounds were evaluated for their uterotrophic, antiuterotrophic and antiimplantation activities in mature female albino rats. 3-Benzyl-7-methoxy-4H-1-benzopyran-4-one (14) showed the highest uterotrophic activity (87%) based on dry uterine weight gain. The antifertility activity, as assessed by the post-coital antiimplantation activity test, was of weak potency for most compounds (14-29%). Among the products, the 2-(4'-methoxyphenyl)-7-methoxy-4H-1-benzopyran-4-one (19) exhibited the highest antiestrogenic activity of 65%. It also elicited 31% of the uterotrophic activity of estradiol. (C) 2001 Editions scientifiques et medicales Elsevier SAS.