The Synthesis of Naphtho[<i>a</i>]carbazoles and Benzo[<i>c</i>]carbazoles
作者:Charles B. de Koning、Joseph P. Michael、Johanna M. Nhlapo、Rakhi Pathak、Willem A. van Otterlo
DOI:10.1055/s-2003-38352
日期:——
The synthesis of naphtho[a]carbazoles and benzo[c]carbazoles from indole precursors using a reaction mediated by potassium? -butoxide and light is described. The indole precursors were prepared utilizing Suzuki coupling methodology.
Tetravalent Spiroselenurane Catalysts: Intramolecular Se···N Chalcogen Bond-Driven Catalytic Disproportionation of H<sub>2</sub>O<sub>2</sub> to H<sub>2</sub>O and O<sub>2</sub> and Activation of I<sub>2</sub> and NBS
spiroselenuranes have been explored as catalysts in synthetic oxidation iodolactonization and bromination of arenes. The synthesized spiroselenurane has activated I2 toward the iodolactonization of alkenoic acids under base-free conditions. Similarly, efficient chemo- and regioselective monobromination of various arenes with NBS catalyzed by chalcogen-bonded synthesized spiroselenuranes has been achieved
硫属元素键相互作用最近在合成化学、结构和键合领域引起了相当大的关注。在这里,通过氧化衍生自 8-氨基喹啉的相应双(2-苯甲酰胺) 硒化物,分离了三种有机螺硒脲,它们的 Se(IV) 中心具有强烈的分子内 Se···N 硫属元素键合相互作用配体。此外,合成的螺硒醚,在测定其抗氧化活性时,首次显示出过氧化氢歧化为 H 2 O 和 O 2 ,由1监测的任何有机硒分子对 H 2 O 2具有一级动力学。核磁共振氢谱。供电子 5-甲硫基苯甲酰胺环取代的螺硒醚以 15.6 ± 0.4 × 10 3 μM min –1的高速率歧化过氧化氢,速率常数为 8.57 ± 0.50 × 10 –3 s –1,而 5-甲氧基和未取代的苯甲酰胺螺硒脲以 7.9 ± 0.3 × 10 3和 2.9 ± 0.3 × 10 3 μM min –1的速率催化 H 2 O 2歧化,速率常数为 1.16 ± 0.02 × 10
Discovery of Isoquinolinone Indole Acetic Acids as Antagonists of Chemoattractant Receptor Homologous Molecule Expressed on Th2 Cells (CRTH2) for the Treatment of Allergic Inflammatory Diseases
Previously we reported the discovery of CRA-898 (1), a diazine indole acetic acid containing CRTH2 antagonist. This compound had good in vitro and in vivo potency, low rates of metabolism, moderate permeability, and good oral bioavailability in rodents. However, it showed low oral exposure in nonrodent safety species (dogs and monkeys). In the current paper, we wish to report our efforts to understand and improve the poor PK in nonrodents and development of a new isoquinolinone subseries that led to identification of a new development candidate, CRA-680 (44). This compound was efficacious in both a house dust mouse model of allergic lung inflammation (40 mg/kg qd) as well as a guinea pig allergen challenge model of lung inflammation (20 mg/kg bid).
Identification and Optimization of Mechanism-Based Fluoroallylamine Inhibitors of Lysyl Oxidase-like 2/3
作者:Alison D. Findlay、Jonathan S. Foot、Alberto Buson、Mandar Deodhar、Andrew G. Jarnicki、Philip M. Hansbro、Gang Liu、Heidi Schilter、Craig I. Turner、Wenbin Zhou、Wolfgang Jarolimek
DOI:10.1021/acs.jmedchem.9b01283
日期:2019.11.14
Lysyl oxidase-like 2 (LOXL2) is a secreted enzyme that catalyzes the formation of cross-links in extracellular matrix proteins, namely, collagen and elastin, and is indicated in fibrotic diseases. Herein, we report the identification and subsequent optimization of a series of indole-based fluoroallylamine inhibitors of LOXL2. The result of this medicinal chemistry campaign is PXS-5120A (12k), a potent, irreversible inhibitor that is >300-fold selective for LOXL2 over LOX. PXS-5120A also shows potent inhibition of LOXL3, an emerging therapeutic target for lung fibrosis. Key to the development of this compound was the utilization of a compound oxidation assay. PXS-5120A was optimized to show negligible substrate activity in vitro for related amine oxidase family members, leading to metabolic stability. PXS-5120A, in a pro-drug form (PXS-5129A, 12o), displayed anti-fibrotic activity in models of liver and lung fibrosis, thus confirming LOXL2 as an important target in diseases where collagen cross-linking is implicated.