Evaluation of 4′-substituted bicyclic pyridones as non-steroidal inhibitors of steroid 5α-reductase
摘要:
4'-Substituted bicyclic pyridones were prepared and evaluated as non-steroidal inhibitors of type I and 2 steroid 5 alpha-reductase (SR). A range of 4'-substituents were incorporated into the bicyclic scaffold to investigate SAR within and across different classes of non-steroidal inhibitors of SR. Bicyclic pyridones containing a 4'-benzoyl or long carbon chain tether showed more potent inhibition against type I SR than inhibitors with N-substituted acetamide groups in the 4'-position. SAR derived from 4'-substituted bicyclic pyridones reported here do not correlate with SAR derived from known potent 4'-substituted biaryl acid SR inhibitors. A 4'-benzoyl group is favoured by the active site in both isozymes. (c) 2007 Elsevier Ltd. All rights reserved.
A General Strategy for Site-Selective Incorporation of Deuterium and Tritium into Pyridines, Diazines, and Pharmaceuticals
作者:J. Luke Koniarczyk、David Hesk、Alix Overgard、Ian W. Davies、Andrew McNally
DOI:10.1021/jacs.7b11710
日期:2018.2.14
molecules are valuable for medicinal chemistry. The prevalence of pyridines and diazines in pharmaceuticals means that new ways to label these heterocycles will present opportunities in drug design and facilitate absorption, distribution, metabolism, and excretion (ADME) studies. A broadly applicable protocol is presented wherein pyridines, diazines, and pharmaceuticals are converted into heterocyclic phosphonium
Remote site-selective C–H activation directed by a catalytic bifunctional template
作者:Zhipeng Zhang、Keita Tanaka、Jin-Quan Yu
DOI:10.1038/nature21418
日期:2017.3
In chemical syntheses, the activation of carbon–hydrogen (C–H) bonds converts them directly into carbon–carbon or carbon–heteroatom bonds without requiring any prior functionalization. C–Hactivation can thus substantially reduce the number of steps involved in a synthesis. A single specific C–H bond in a substrate can be activated by using a ‘directing’ (usually a functional) group to obtain the desired
recent developments, this work demonstrates the utilization of a chelating template backbone bearing covalently attacheddirecting groups, which enables site‐selective remote C−H functionalization of heterocycles. The observed selectivity is the outcome of non‐covalent interactions between the heterocycles and bifunctional template backbone.
Divergent synthesis of arylated pyridin-2(1H)-one derivatives via metal-catalysed cross-coupling processes
作者:Jamie S. Siddle、Andrei S. Batsanov、Stuart T. Caldwell、Graeme Cooke、Martin R. Bryce
DOI:10.1016/j.tet.2010.05.108
日期:2010.8
1,5-Di(hetero)arylated-pyridin-2(1H)-one derivatives have been readily obtained in good yields starting from 2-fluoro-5-pyridylboronic acid. The sequence comprises three steps: (i) palladium-catalysed Suzuki-Miyaura reaction; (ii) base-catalysed hydrolysis; (iii) copper-catalysed C–N coupling. X-ray crystal structures are reported for selected pyridin-2(1H)-one derivatives. These compounds are of interest
Ag(<scp>i</scp>)-Mediated hydrogen isotope exchange of mono-fluorinated (hetero)arenes
作者:Guang-Qi Hu、En-Ci Li、Hong-Hai Zhang、Wei Huang
DOI:10.1039/d0ob01273d
日期:——
approach to install deuterium into mono-fluorinated (hetero)arenes by a Ag2CO3/Sphos-mediated HIE protocol with D2O as the deuterium source has been disclosed. This method showed a specific site selectivity of deuteration at the α-position of the fluorine atom, which is complementary to the existing transition metal-catalyzed HIE process.
已经公开了一种通过 Ag 2 CO 3 /Sphos 介导的 HIE 协议将氘安装到单氟化(杂)芳烃中的有效方法,其中 D 2 O 作为氘源。该方法在氟原子的 α 位显示出特定的氘化位点选择性,这与现有的过渡金属催化的 HIE 工艺互补。