Rearrangement of 2-ethynylpyridinium N-imides to pyrazolo[2,3-a]pyridines
作者:Takashi Tsuchiya、Haruki Sashida
DOI:10.1039/c39800001109
日期:——
Pyrazolo[2,3-a]pyridines (6) are obtained from the N-amino-2-ethynylpyridinium salts (5) on treatment with base.
由N-氨基-2-乙炔基吡啶鎓盐(5)经碱处理获得吡唑并[2,3- a ]吡啶(6)。
Synthesis of 2-Substituted Pyrazolo[1,5-<i>a</i>]pyridines through Cascade Direct Alkenylation/Cyclization Reactions
作者:James J. Mousseau、Angélique Fortier、André B. Charette
DOI:10.1021/ol902710f
日期:2010.2.5
from N-iminopyridinium ylides is described. These medicinally interesting compounds are formed through a cascadeprocess involving a palladium-catalyzed direct alkenylation reaction followed by silver-mediated cyclization. The reaction can be performed with a wide range of electron-poor and electron-rich alkenyl iodides in good yields. This work represents perhaps the most direct route for the preparation
描述了由N-亚氨基吡啶鎓的叶立德合成2-取代的吡唑并[1,5- a ]吡啶。这些医学上有趣的化合物是通过级联过程形成的,该过程涉及钯催化的直接烯基化反应,然后进行银介导的环化反应。该反应可与多种贫电子和富电子的烯基碘化物以高收率进行。这项工作可能代表了制备这些化合物的最直接途径。
3-aminopyrazolo heterocyclic derivatives, and use for colorimetric
申请人:Boehringer Mannheim
公开号:US05457200A1
公开(公告)日:1995-10-10
The present invention is concerned with the use of certain 3-aminopyrazolo-heterocyclic compounds for the colorimetric determination of hydrogen peroxide, hydrogen peroxide-forming systems, peroxidase, peroxidate-active substances and electron-rich aromatic compounds. The present invention is also concerned with corresponding processes of determination and with agents appropriate therefor. Furthermore, the present invention is concerned with new 3-aminopyrazolo-heterocyclic compounds.
Heterocyclic compound and organic light emitting device using same
申请人:HEESUNG MATERIAL LTD.
公开号:US10344030B2
公开(公告)日:2019-07-09
The present application provides a hetero-cyclic compound which may significantly improve the service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.