General and Regioselective Synthesis of Pyrroles via Ruthenium-Catalyzed Multicomponent Reactions
作者:Min Zhang、Xianjie Fang、Helfried Neumann、Matthias Beller
DOI:10.1021/ja406666r
日期:2013.7.31
alkyl substrates were efficiently converted in combination with different type of amines and vicinal diols into various substituted pyrroles in reasonable to excellent isolated yields. Additionally, α-functionalized ketones gave synthetically interesting amido-, alkoxy-, aryloxy-, and phosphate-substituted pyrroles in a straightforward manner. The synthetic protocol proceeds in the presence of a commercially
已经开发了通过钌催化的三组分反应通用和高度区域选择性合成吡咯。包括反应性较低的芳基和烷基底物在内的各种酮与不同类型的胺和邻二醇结合,以合理到极好的分离产率有效地转化为各种取代的吡咯。此外,α-官能化的酮以直接的方式合成有趣的酰胺基、烷氧基、芳氧基和磷酸酯取代的吡咯。合成方案在市售钌催化剂系统和催化量的碱存在下进行。它以高原子效率进行,显示出广泛的底物范围和官能团耐受性,使其成为制备各种吡咯衍生物的一种非常实用的方法。