One-Step Synthesis of Highly Functionalized Monofluorinated Cyclopropanes from Electron-Deficient Alkenes
摘要:
The unique combination of Zn/LiCl allowed generation of reactive zinc enolate from ethyl dibromofluoroacetate. This fluorinated enolate reacts efficiently with a wide range of functionalized electron-deficient alkenes to afford the corresponding monofluorinated cyclopropylcarboxylates in good yields.
Palladium-Catalyzed Allylic Alkylation via Photocatalytic Nucleophile Generation
作者:Yang Shen、Zhen-Yao Dai、Cheng Zhang、Pu-Sheng Wang
DOI:10.1021/acscatal.1c01500
日期:2021.6.18
hydrogen atom transfer photocatalyst-mediated nucleophile generation and palladium-catalyzed allylicalkylation. The synthetic utility of this strategy is embodied by a concise synthesis of (±)-mesembrine. Mechanistic studies suggest that this protocol proceeds via a radical/ionic relay process, and a carbanionic species serves as a key intermediate for nucleophile attack on π-allylpalladium through a classic