Palladium-catalyzed cyclization of bromoenynamides to tricyclic azacycles: synthesis of trikentrin-like frameworks
作者:Craig D. Campbell、Rebecca L. Greenaway、Oliver T. Holton、Helen A. Chapman、Edward A. Anderson
DOI:10.1039/c3cc45634j
日期:——
Palladium-catalyzed cascade cyclization of bromoenynamides equipped with an additional alkyne or ynamide substituent affords azatricyclic products. Using 5- to 7-membered ring tethers, this chemistry offers a regiospecific route to highly-functionalized azacycles. Elaboration to the trikentrin B skeleton is achieved from the arylsilane cyclization products.
酸化铂催化的溴烯炔酰胺级联环化反应,配备额外的炔烃或炔腈取代基,能够获得氮杂三环产物。利用5到7元环的连接体,这种化学反应提供了一条区域选择性的路径,合成高度功能化的氮杂环。通过芳基硅烷环化产物,可以进一步合成三嵌环B骨架。