Ruthenium-Catalyzed Functionalization of Pyrroles and Indoles with Propargyl Alcohols
作者:Nora Thies、Cristian G. Hrib、Edgar Haak
DOI:10.1002/chem.201200188
日期:2012.5.14
Several ruthenium‐catalyzed atom‐economic transformations of propargyl alcohols with pyrroles or indoles leading to alkylated, propargylated, or annulated heteroaromatics are reported. The mechanistically distinct reactions are catalyzed by a single ruthenium(0) complex containing a redox‐coupled dienone ligand. The mode of activation regarding the propargyl alcohols determines the reaction pathway
据报道,几种钌催化的炔丙醇与吡咯或吲哚的原子经济转化会导致烷基化,炔丙基化或环化的杂芳族化合物。在机理上截然不同的反应是由包含氧化还原偶联的二烯酮配体的单一钌(0)配合物催化的。关于炔丙醇的活化方式决定了反应途径,并取决于醇的取代方式。次级底物通过1,2-氢转移形成烯基配合物,而第三级底物的转化涉及亚烯基中间体。1-乙烯基炔丙醇通过级联烯丙基化/环化序列转化。