[EN] SUBSTITUTED QUINOXALINE DERIVATIVES<br/>[FR] DÉRIVÉS DE QUINOXALINE SUBSTITUÉS
申请人:SELVITA S A
公开号:WO2016180537A1
公开(公告)日:2016-11-17
The present invention relates to substituted quinoxaline derivatives. These compounds are useful for the prevention and/or treatment of several medical conditions including hyperproliferative disorders and diseases.
Unusual<i>t</i>-BuLi Induced Ortholithiation versus Halogen-Lithium Exchange in Bromopyridines: Two Alternative Strategies for Functionalization
作者:Philippe Gros、Yves Fort、Philippe Pierrat
DOI:10.1055/s-2004-831337
日期:——
The reaction of lithiating agents with various 3-bromopyridines has been investigated. An unprecedented selectivity was observed with t-BuLi, which effected a clean lithiation at C-4. With 3-bromo and 2-chloro-3-bromo pyridines, the ortholithiation-exchange ratio was strongly electrophile and addition order dependent while 2-chloro-5-bromopyridine always gave exclusive C-4 substitution.
A series of substituted fused bicyclic imidazole derivatives, including benzimidazole derivatives and analogues thereof, being potent modulators of human IL-17 activity, are accordingly of benefit in the treatment and/or prevention of various human ailments, including inflammatory and autoimmune disorders.
The reaction of some Halogenated Pyridine Thioethers and sulphones with carbon disulphide
作者:A. D. Dunn、R. Norrie
DOI:10.1002/prac.19933350309
日期:——
Dithiocarboxylation of some halogenated pyridine sulphones with carbon disulphide and sodium hydride leads to the formation of thiomethyl derivatives via Smiles rearrangement of the inititially produced dianion, fragmentation and subsequent methylation. In one instance the pyridino[2,3-b]-1,4-dithiine 7 was obtained. The thioether 2d was also converted into a thiomethyl derivative when subjected to the same reaction sequence.