Through the oxidative addition of cobalt into the N-C(O) bond of phthalimide and the subsequent decarbonylation, we describe an efficient cobalt-catalyzed intermolecular decarbonylative carboamidation of alkynes. High regioselectivities have been achieved for unsymmetrical alkynes (including aryl-alkyl or aryl-aryl) to deliver polysubstituted isoquinolones. To facilitate step economy, a three-component
Transition metal catalyzed decarbonylation offers a distinct synthetic strategy for new chemical bond formation. However, the π‐backbonding between CO π* orbitals and metal center d‐orbitals impedes ligand dissociation to regenerate the catalyst under mild reaction conditions. Developed here is visible light induced rhodium catalysis for decarbonylativecoupling of imides with alkynes under ambient
Nickel‐Catalyzed Carboxylation of Aryl C−F Bonds with CO
<sub>2</sub>
作者:Chunzhe Pei、Baiquan Wang
DOI:10.1002/adsc.202101499
日期:2022.3.30
The C−F bond is the strongest single bond and it is one of the most challenging tasks to achieve the C−F bond functionalization. Here, we describe the first nickel-catalyzed selective defluorinative carboxylation of arylC−Fbonds with CO2. Various methyl carboxylates including partially fluorinated carboxylation compounds were obtained. Mechanistic studies reveal that the azanickelacycles might be
C-F 键是最强的单键,是实现 C-F 键功能化的最具挑战性的任务之一。在这里,我们描述了第一次镍催化的芳基 C-F 键与 CO 2的选择性脱氟羧化反应。获得了包括部分氟化的羧化化合物的各种羧酸甲酯。机理研究表明氮杂镍环可能是这种转变中的重要中间体。这种新颖而直接的羧化策略将扩展 C-F 键功能化的范围,并增强对非常稳定键的反应性的理解。