吡嗪是有机光电材料中使用的重要分子支架。在这里,我们报告有效的方法来合成二吡咯并吡嗪和吡咯并噻吩并吡嗪衍生物,其中涉及二卤代吡咯并吡嗪的区域选择性胺化反应。所开发的方案容易从相应的2-溴-3-氯-5 H-吡咯并[2,3- b ]吡嗪提供2-氨基-或3-氨基-吡咯并吡嗪。当胺化反应在不含金属的微波辐射下进行时,仅获得3-氨基-吡咯并吡嗪。相反,2-溴-3-氯-5 H-吡咯并[2,3- b]吡嗪仅提供2-氨基-吡咯并吡嗪。使用Sonogashira反应将吡咯并吡嗪支架转化为相应的1,7-和1,5-二氢二吡咯并[2,3- b ]吡嗪衍生物。对合成化合物的光学性质,热性质和分子堆积进行了全面的研究。结果表明,1,7衍生物可能是有前途的有机材料,可用于光电应用。
The present invention relates to the use of novel pyrrolo[2,3-b]]pyrazines wherein all variable substituents are defined as described herein, which are SYK inhibitors and are useful for the treatment of auto-immune and inflammatory diseases.
The present invention relates to the use of novel pyrrolo[2,3-b]]pyrazines wherein all variable substituents are defined as described herein, which are SYK inhibitors and are useful for the treatment of auto-immune and inflammatory diseases.