Synthesis of Tricyclic Fused 3-Aminopyridines through Intramolecular Co<sup>I</sup>-Catalyzed [2+2+2] Cycloaddition between Ynamides, Nitriles, and Alkynes
作者:Pierre Garcia、Solenne Moulin、Yves Miclo、David Leboeuf、Vincent Gandon、Corinne Aubert、Max Malacria
DOI:10.1002/chem.200802301
日期:2009.2.16
Three‐ring circus: An expedient route to tricyclic fused 2‐trimethylsilyl‐3‐aminopyridines exhibiting unprecedented skeletons is described. The key step is a very efficient cobalt‐catalyzed [2+2+2] cycloaddition of a polyunsaturated compound displaying an ynamide, an alkyne, and a nitrile functionality (see picture).
三环马戏团:描述了显示出空前骨架的三环稠合2-三甲基甲硅烷基-3-氨基吡啶的简便方法。关键步骤是非常高效的钴催化的[2 + 2 + 2]环加成多不饱和化合物,该化合物具有乙酰胺,炔烃和腈官能团(见图)。