Palladium-catalyzed regiodivergent hydroaminocarbonylation of alkenes to primary amides with ammonium chloride
作者:Bao Gao、Guoying Zhang、Xibing Zhou、Hanmin Huang
DOI:10.1039/c7sc04054g
日期:——
the synthesis of primary amides has long been an elusive aim. Here, we report an efficient catalytic system which enables inexpensive NH4Cl to be utilized as a practical alternative to gaseous ammonia for the palladium-catalyzed alkene-hydroaminocarbonylation reaction. Through appropriate choice of the palladium precursors and ligands, either branched or linear primary amides can be obtained in good
钯催化烯烃的氢氨基羰基化合成伯酰胺长期以来一直是一个难以实现的目标。在这里,我们报道了一种高效的催化系统,该系统能够利用廉价的 NH 4 Cl 作为气态氨的实际替代品,用于钯催化的烯烃-氢氨基羰基化反应。通过适当选择钯前体和配体,可以以良好的产率获得支链或直链伯酰胺,并具有良好至优异的区域选择性。进行了初步机理研究并揭示了亲电子酰基钯物质能够在 CO 存在下以 NMP 作为碱捕获铵盐中的 NH 2 -部分以形成酰胺。