Highly efficient synthesis of 5,6-disubstituted-5H-pyrrolo[2,3-b]pyrazine-2,3-dicarbonitriles through a one-pot palladium-catalyzed coupling reaction/cyclization in water
作者:Ali Keivanloo、Mohammad Bakherad、Hossein Nasr-Isfahani、Somayeh Esmaily
DOI:10.1016/j.tetlet.2012.04.016
日期:2012.6
A highly efficient one-pot synthesis of 5,6-disubstituted-5H-pyrrolo[2,3-b]pyrazine-2,3-dicarbonitriles is presented. The reaction of 5-(alkyl-arylamino)-6-chloropyrazine-2,3-dicarbonitriles with phenylacetylene, catalyzed by Pd–Cu, in the presence of SDS as the surfactant in water, leads to the desired products in good-to-high yields.
提出了高效的一锅法合成5,6-二取代-5 H-吡咯并[2,3 - b ]吡嗪-2,3-二碳腈。在水中存在表面活性剂SDS的情况下,在Pd-Cu催化下,5-(烷基-芳基氨基)-6-氯吡嗪-2,3-二腈与苯乙炔的反应可制得所需的产品。高产。