Regioselective Synthesis of Trialkylpyrazines via Nickel-Catalyzed Negishi Cross-Coupling of Pyrazine Triflate
摘要:
A regioselective synthesis of trialkylpyrazines via nickel-catalyzed cross-coupling reaction of pyrazine triflate is reported. The 5-substituted 2,3-dimethylpyrazine derivatives including trail pheromone components of the ant Eutetramorium mocquerysi have been successfully synthesized in good yields by nickel-catalyzed Negishi cross-coupling reactions of pyrazine triflate mediated by alkyl and arylzinc halides.
The present invention relates generally to chemical compounds and methods for their use and preparation. In particular, the invention relates to chemical compounds which may possess useful therapeutic activity, use of these compounds in methods of therapy and the manufacture of medicaments as well as compositions containing these compounds.
TRIAZOLOPYRIDINES AND TRIAZOLOPYRAZINES AS LSD1 INHIBITORS
申请人:Incyte Corporation
公开号:US20160009721A1
公开(公告)日:2016-01-14
The present invention is directed to [1,2,4]triazolo[4,3-a]pyridine and [1,2,4]triazolo[4,3-a]pyrazine derivatives which are LSD1 inhibitors useful in the treatment of diseases such as cancer.
Exploiting 3-Oxidopyraziniums toward Diazabicyclo[3.2.1]octanes and Their Conversion into Diazabicyclo[2.2.2]octanes and Tricyclic Lactone-Lactams
作者:Gerard Riesco-Llach、Marta Planas、Lidia Feliu、John A. Joule
DOI:10.1021/acs.joc.3c02273
日期:2024.3.1
3-Oxidopyraziniums are azomethine ylides derivedfrom 2(1H)-pyrazinones that can undergo 1,3-dipolarcycloadditions with acrylate and acrylic acid derivatives. The cycloaddition of 1-(4-methoxybenzyl)-5,6-dimethyl-3-oxidopyrazinium with methyl and tert-butyl acrylate and with methyl crotonate afforded a 3,8-diazabicyclo[3.2.1]octane in 51–73% yield together with traces of the 2,5-diazabicyclo[2.2.2]octane
Pyrazines, pyrimidines and pyridazines, useful in the treatment of senile dementia
申请人:MERCK SHARP & DOHME LTD.
公开号:EP0327155A2
公开(公告)日:1989-08-09
The present invention provides pyrazines, pyridazines or pyrimidines, or salts or prodrugs thereof, substituted on one of the ring carbon atoms therefore with a non-aromatic azacyclic or azabicyclic ring system; and independently substituted on each of the other ring carbon atoms with a substituent of low lipophilicity or a hydrocarbon substituent; which compounds stimulate central muscarinic acetylcholine receptors and therefore are useful in the treatment of neurological and mental illnesses.