作者:Jeffrey T. Kuethe、Audrey Wong、Ian W. Davies
DOI:10.1021/jo048887v
日期:2004.10.1
palladium-catalyzed amination of 2-chloro-3-iodopyridine followed by a subsequent palladium-catalyzed amination leads to 2,3-diaminopyridines. Treatment with triphosgene affords highly functionalized unsymmetrical imidazo[4,5-b]pyridin-2-ones in just three synthetic steps. A two-step synthesis of pseudosymmetrically disubstituted imidazo[4,5-b]pyridin-2-ones, 1,4-disubstituted pyrido[2,3-b]pyrazinediones
区域选择性钯催化的2-氯-3-碘吡啶的胺化,然后是随后钯催化的胺化,生成2,3-二氨基吡啶。用三光气处理仅需三个合成步骤即可得到高度官能化的不对称咪唑并[4,5 - b ]吡啶-2-酮。pseudosymmetrically二取代的咪唑并[4,5的两步合成b ]吡啶-2-酮,1,4-二取代吡啶并[2,3- b ] pyrazinediones,和1,3-二取代的噻二唑并[3,4- b还描述了吡啶-2-酮。