Palladium-Catalyzed Regioselective Hydroaminocarbonylation of Alkynes to α,β-Unsaturated Primary Amides with Ammonium Chloride
作者:Xiaolei Ji、Bao Gao、Xibing Zhou、Zongjian Liu、Hanmin Huang
DOI:10.1021/acs.joc.8b01405
日期:2018.9.7
α,β-Unsaturated primary amides have found numerous applications in drug development, organic materials, and polymer sciences. However, the catalytic synthesis of α,β-unsaturated primary amides via carbonylation of alkynes has long been an elusive endeavor. Here, we report a novel palladium-catalyzed hydroaminocarbonylation of alkynes with NH4Cl as the amine source, enabling the highly chemo- and regioselective
α,β-不饱和伯酰胺在药物开发,有机材料和聚合物科学中发现了许多应用。然而,长期以来,通过炔烃的羰基化催化合成α,β-不饱和伯酰胺一直是一项艰巨的努力。在这里,我们报告一种新型的钯催化炔烃与NH 4的加氢氨基羰基化反应Cl作为胺源,可以高度化学和区域选择性地合成α,β-不饱和伯酰胺。包括芳族炔烃,脂族炔烃,末端炔烃,内部炔烃以及具有各种官能团的二炔在内的多种炔烃反应良好。该方法将铵盐的寄生非配位能力转变为战略优势,从而使克级反应可以在0.05 mol%的催化剂存在下进行,并且具有出色的选择性。