Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of Secondary α-(Trifluoromethyl)benzyl Tosylates
作者:Marta Brambilla、Matthew Tredwell
DOI:10.1002/anie.201706631
日期:2017.9.18
palladium‐catalyzed C(sp3)−C(sp2) Suzuki–Miyaura cross‐coupling of aryl boronic acids and α‐(trifluoromethyl)benzyl tosylates is reported. A readily available, air‐stable palladium catalyst was employed to access a wide range of functionalized 1,1‐diaryl‐2,2,2‐trifluoroethanes. Enantioenriched α‐(trifluoromethyl)benzyl tosylates were found to undergo cross‐coupling to give the corresponding enantioenriched
Photoredox-Catalyzed Ring-Opening Addition Reaction between Benzyl Bromides and Cyclic Ethers
作者:Jinbo Hu、Cuiwen Kuang、Chuanfa Ni、Yucheng Gu
DOI:10.1055/a-1671-6856
日期:2022.3
A novel nucleophilic reaction between cyclic ethers and benzylbromides is achieved under photoredox catalysis. The reaction proceeds through a single-electron-transfer (SET) pathway rather than a common SN2 mechanism. By two steps of reduction and oxidation, a benzylbromide heterolyzes to give a carbocation and bromide ion under mild conditions, and then a cyclic ether captures both the carbocation
Streamlined Electrochemical Dihalogenation (F, Cl, and Br) of gem‐Difluoroalkenes Using Hydrogen Halides as Reagents
作者:Xiaoying Wang、Rui Zhang、Jiaxi Cai、Xin Liu、Haixia Song、Le Liu、Xin‐Hua Duan、Mingyou Hu
DOI:10.1002/ejoc.202400351
日期:2024.8.5
We established a straightforward electrochemical dihalogenation (F, Cl, and Br) process for gem‐difluoroalkenes. This reaction exhibits a broad functional group tolerance and has been effectively utilized in the construction of complex molecules. The subsequent synthetic transformations of the products have highlighted the adaptable nature of the dihalogenated compounds, demonstrating their potential application in drug discovery and the investigation of innovative materials. The effective utilization of the dihalogenated product for 18F‐labeling represents a novel approach in generating highly potent 18F‐labeled tracers.