activation of tertiary amines provide one of the cornerstones of modern organic synthesis. Here we describe a palladium-catalyzed selective CN bond cleavage of N-propargyl 1,3-oxazolidines, providing an efficient approach to a diverse range of oxazolines in good to excellent yields. The reaction proceeds through a domino process of the alkyne-enabled 1,5-hydrogen transfer/CN bond activation. In this
能够选择性活化叔胺的 C N 键的策略是现代有机合成的基石之一。在这里,我们描述了钯催化的N-炔丙基 1,3-恶唑烷的选择性 CN 键断裂,为多种恶唑啉的产率良好到优异提供了一种有效的方法。该反应通过炔烃启用的 1,5-氢转移/C N 键激活的多米诺骨牌过程进行。通过这种方式,形成了两种耐受多种官能团的恶唑啉骨架。
Synthesis of multisubstituted pyrroles by nickel-catalyzed arylative cyclizations of <i>N</i>-tosyl alkynamides
作者:Simone M. Gillbard、Chieh-Hsu Chung、Somnath Narayan Karad、Heena Panchal、William Lewis、Hon Wai Lam
DOI:10.1039/c8cc06649c
日期:——
arylnickelation, followed by cyclization of the resulting alkenylnickel species onto the amide. The reversible E/Z isomerization of the alkenylnickel species is critical for cyclization. This method was applied to the synthesis of pyrroles that are precursors to BODIPY derivatives and a biologicallyactivecompound.