Palladium-Catalyzed Intramolecular CH Difluoroalkylation: Synthesis of Substituted 3,3-Difluoro-2-oxindoles
作者:Shi-Liang Shi、Stephen L. Buchwald
DOI:10.1002/anie.201410471
日期:2015.1.26
3‐difluoro‐2‐oxindoles through a robust and efficient palladium‐catalyzed CH difluoroalkylation is described. This process generates a broad range of difluorooxindoles from readily prepared starting materials. The use of BrettPhos as the ligand was crucial for high efficiency. Preliminary mechanistic studies suggest that oxidative addition is the rate‐determining step for this process.
描述了通过稳健而有效的钯催化的CH二氟烷基化反应合成3,3-二氟-2-氧吲哚的方法。该方法从容易制备的起始原料中产生了广泛范围的二氟羟吲哚。使用BrettPhos作为配体对于提高效率至关重要。初步的机理研究表明,氧化添加是该过程的决定速率的步骤。