作者:Erik Van der Eycken、Denis Ermolat’ev、Vaibhav Mehta
DOI:10.1055/s-2007-992358
日期:——
A highly efficient method for the preparation of trisubstituted furo[2,3-b]pyrazines has been developed. Sonogashira coupling reaction with the readily available 1-(4-methoxybenzyl)-3,5-dichloropyrazin-2(1H)-ones was followed by silver-catalyzed heteroannulation to provide the corresponding 2-chlorofuro[2,3-b]pyrazines in excellent yields. The latter were subjected to Suzuki or Buchwald-Hartwig coupling reaction for further decoration.
开发了一种制备三取代呋喃并[2,3-b]吡嗪的高效方法。首先使用易于获得的1-(4-甲氧基苄基)-3,5-二氯吡嗪-2(1H)-酮进行Sonogashira偶联反应,随后通过银催化的杂环化作用,以优异的产率得到了相应的2-氯呋喃并[2,3-b]吡嗪。后者再通过Suzuki或Buchwald-Hartwig偶联反应进行进一步修饰。