Studies on Pyrazines; 21.<sup>1</sup>A Convenient Synthesis of Pyrazinecarboxylic Acid Derivatives from Chloropyrazines
作者:Ryo Takeuchi、Katsunobu Suzuki、Nobuhiro Sato
DOI:10.1055/s-1990-27055
日期:——
Palladium-catalyzed carbonylation of chloropyrazines in methanol led to pyrazinecarboxylic esters in good yields. Similarly, pyrazinecarboxamides were obtained by using dialkylamines or alkylamines as the solvent.
the coupling of electron-rich and electron-poor aryl halides with both primary and secondary alkyl amines. In this study, it is reported that a Ni(II)-bipyridine complex catalyzes efficient C–N coupling of aryl chlorides and bromides with various primary and secondary alkyl amines under direct excitation with light. Intramolecular C–N coupling is also demonstrated. The feasibility and applicability of