Carbonylation reactions constitute important methodologies for the synthesis of all kinds of carboxylic acid derivatives. The development of novel and efficient catalysts for these transformations is of interest for both academic and industrial research. Here, the first palladium-based catalyst system for the aminocarbonylation of 1,3-dienes is described. This atom-efficient transformation proceeds
(including anilines, amines, amino acids, peptides, aryl-1,3-dienes, alyl-1,3-dienes) and tolerates a wide range of functional groups, thus providing a facile and effective approach to access a diverse array of α-substituted β,γ-unsaturated amides. Mechanistic investigations suggested that the hydropalladation of dienes is irreversible, and the insertion of CO into the allyl-Pd species is probably the
共轭二烯的烃基化是合成羰基化合物最有前途但最具挑战性的方法之一。在此,我们报道了前所未有的钯催化的 1,3-二烯与 CO 和胺盐酸盐的支化选择性 3,4-氢氨基羰基化反应,得到β,γ-不饱和酰胺。该反应采用现成的起始材料(包括苯胺、胺、氨基酸、肽、芳基 1,3-二烯、芳基 1,3-二烯)并可耐受多种官能团,因此提供了一种简便有效的方法访问各种α -取代的β,γ-不饱和酰胺。机理研究表明,二烯的加氢钯化反应是不可逆的,将 CO 插入烯丙基钯物种中可能是限速步骤。