γ-Carboline synthesis enabled by Rh(<scp>iii</scp>)-catalysed regioselective C–H annulation
作者:Bo Jiang、Jingwen Jia、Yufei Sun、Yichun Wang、Jing Zeng、Xiubin Bu、Liangliang Shi、Xiaoying Sun、Xiaobo Yang
DOI:10.1039/d0cc04740f
日期:——
A Rh(iii)-catalysed C–H annulation of indolyl oximes with alkynyl silanes was developed, delivering diverse γ-carbolines with unexpected reverse regioselectivity.
An efficient and direct preparation of functionalized δ-carbolines, via a ring closure reaction between the appropriate indole amine and a masked 1,3-dicarbonyl compound is described. This method afforded new 3-substituted δ-carbolines and these products were subjected to ortho-lithiation experiments. Various 3,4-disubstituted δ-carbolines were obtained in acceptable yields.
Structure−Activity Relationships of <i>N</i>-Hydroxyurea 5-Lipoxygenase Inhibitors
作者:Andrew O. Stewart、Pramila A. Bhatia、Jonathan G. Martin、James B. Summers、Karen E. Rodriques、Michael B. Martin、James H. Holms、Jimmie L. Moore、Richard A. Craig、Teodozyj Kolasa、James D. Ratajczyk、Hormoz Mazdiyasni、Francis A. J. Kerdesky、Shari L. DeNinno、Robert G. Maki、Jennifer B. Bouska、Patrick R. Young、Carmine Lanni、Randy L. Bell、George W. Carter、Clint D. W. Brooks
DOI:10.1021/jm9700474
日期:1997.6.1
The discovery of second generation N-hydroxyurea 5-lipoxygenase inhibitors was accomplished through the development of a broad structure-activity relationship (SAR) study. This study identified requirements for improving potency and also extending duration by limiting metabolism. Potency could be maintained by the incorporation of heterocyclic templates substituted with selected lipophilic substituents. Duration of inhibition after oral administration was optimized by identification of structural features in the proximity of the N-hydroxyurea which correlated to low in vitro glucuronidation rates. Furthermore, the rate of in vitro glucuronidation was shown to be stereoselective for certain analogs. (R)-N-[3-[5-(4-Fluorophenoxy)-2-furyl]-1-methyl-2-propynyl]-N-hy- droxyurea (17c) was identified and selected for clinical development.
Synthesis of 3-(2-pyrrolyl)indoles
作者:M. A. Yurovskaya、V. V. Druzhinina、E. V. Snetkova、Yu. G. Bundel'