Push–pull structures with a pyrazine core and hexatriene chain: synthesis and light-emitting properties
作者:Nordine Hebbar、Yvan Ramondenc、Gérard Plé、Georges Dupas、Nelly Plé
DOI:10.1016/j.tet.2009.03.042
日期:2009.5
In this paper, we describe the synthesis of various push–pull molecules with a central pyrazine unit connected to a hexatriene chain terminated by various p-substituted phenyl groups. The key steps involve metallation and subsequent transmetallation of 2-chloro and 2,6-dichloropyrazine followed by a Negishi cross-coupling reaction of the intermediate organozinc derivative with (2E,4E)-5-bromopentadienal
在本文中,我们描述了各种推挽分子的合成方法,这些推挽分子的中心吡嗪单元连接至以各种对位取代的苯基为末端的己三烯链。关键步骤涉及2-氯和2,6-二氯吡嗪的金属化和随后的金属转移,然后是中间有机锌衍生物与(2 E,4 E)-5-溴戊二烯醛的Negishi交叉偶联反应。然后使醛与容易地从各种取代的苄醇获得的合适的salts盐进行Wittig反应。然后,根据吸收光谱和发射光谱研究如此获得的分子的发光性质,并且在两种情况下进行了非线性光学实验。