Reaction of Pyridine‐
<i>N</i>
‐Oxides with Tertiary sp
<sup>2</sup>
‐
<i>N</i>
‐Nucleophiles: An Efficient Synthesis of Precursors for
<i>N</i>
‐(Pyrid‐2‐yl)‐Substituted
<i>N</i>
‐Heterocyclic Carbenes
作者:Dmitry I. Bugaenko、Marina A. Yurovskaya、Alexander V. Karchava
DOI:10.1002/adsc.202001063
日期:2020.12.22
N‐(Pyrid‐2‐yl)‐substituted azolium and pyridinium salts, precursors for hybrid NHC‐containing ligands, were obtained with excellent regioselectivity, employing a deoxygenative CH‐functionalization of pyridine‐N‐oxides with substituted imidazoles, thiazoles, and pyridine. Unlike the traditional SNAr‐based methods, this approach provides high yields for substrates bearing substituents of different electronic
通过使用取代的咪唑,噻唑和吡啶对吡啶-N-氧化物进行脱氧CH-官能团化反应,获得了具有出色的区域选择性的N-(吡啶-2-基)-取代的azo盐和吡啶鎓盐,具有优异的区域选择性。。与传统的基于S N Ar的方法不同,此方法可为带有不同电子性质取代基的底物提供高收率。吡啶基取代的咪唑基-2-硫酮,苯并二氮杂以及2-氨基吡啶的合成也突出了如此制备的偶氮盐和吡啶鎓盐的用途。
Tetrahydroquinoline derivatives as CRTH2 antagonists
申请人:Warner-Lambert Company LLC
公开号:EP1413306A1
公开(公告)日:2004-04-28
The invention relates to compounds of formula (I)
wherein R1, R2, R3, R4, R5, R6, R7 and R8 are as defined in the description, their use as medicament, pharmaceutical compositions containing them and processes for their preparation.
Quaternary <i>N</i>-(2-Pyridyl)-DABCO Salts: One-Pot in Situ Formation from Pyridine-<i>N</i>-oxides and Reactions with Nucleophiles: A Mild and Selective Route to Substituted <i>N</i>-(2-Pyridyl)-<i>N</i>′-ethylpiperazines
作者:Dmitry I. Bugaenko、Marina A. Yurovskaya、Alexander V. Karchava
DOI:10.1021/acs.joc.6b02952
日期:2017.2.17
simple, metal-free, one-pot synthetic procedure involves the initial reaction of activated heterocyclic N-oxides with DABCO, followed by in situ treatment of the resultant quaternary N-(2-pyridyl)-DABCO salts with nucleophiles, resulting in ring-opening. The method features mild reaction conditions, high positional selectivity, and excellent functional-group tolerance. The utility of our approach is demonstrated
Novel pyrazole compounds as transforming growth factor (TGF) inhibitors
申请人:Pfizer Inc
公开号:US20040116474A1
公开(公告)日:2004-06-17
Novel pyrazole compounds, including derivatives thereof, to intermediates for their preparation, to pharmaceutical compositions containing them and to their medicinal use are described. The compounds of the present invention are potent inhibitors of transforming growth factor (“TGF”)-&bgr; signaling pathway. They are useful in the treatment of various TGF-related disease states including, for example, cancer, and fibrotic diseases.
NOVEL PYRAZOLE COMPOUNDS AS TRANSFORMING GROWTH FACTOR (TGF) INHIBITORS
申请人:Munchhof J. Michael
公开号:US20070117850A1
公开(公告)日:2007-05-24
Novel pyrazole compounds, including derivatives thereof, to intermediates for their preparation, to pharmaceutical compositions containing them and to their medicinal use are described. The compounds of the present invention are potent inhibitors of transforming growth factor (“TGF”)-
signaling pathway. They are useful in the treatment of various TGF-related disease states including, for example, cancer, and fibrotic diseases.