6-Substituted-5H-pyrrolo[2,3-b]pyrazines via palladium-catalyzed heteroannulation from N-(3-chloropyrazin-2-yl)-methanesulfonamide and alkynes
作者:Corey R. Hopkins、Nicola Collar
DOI:10.1016/j.tetlet.2004.08.155
日期:2004.10
We herein report the efficient and convenient synthesis of 6-substituted-5H-pyrrolo[2,3-b]pyrazines. The reaction is a palladium-catalyzed heteroannulation process followed by deprotection to yield the desired pyrrolo[2,3-b]pyrazine substrates. The reaction starts with readily accessible N-(3-chloropyrazin-2-yl)-methanesulfonamide and commercially available terminal alkynes and works with aryl- and
我们在本文中报道了6-取代的-5 H-吡咯并[2,3- b ]吡嗪的有效和方便的合成。该反应是钯催化的杂环化过程,然后脱保护以得到所需的吡咯并[2,3- b ]吡嗪底物。该反应从容易获得的N-(3-氯吡嗪-2-基)-甲磺酰胺和可商购的末端炔烃开始,并与芳基和烷基炔烃一起使用。