Sodium-Ketyl Radical Anions by Reverse Pinacol Reaction and Their Coupling with Iodoarenes
作者:Xinjun Tang、Armido Studer
DOI:10.1021/acs.orglett.6b02184
日期:2016.9.2
Transition-metal-free C–C bond formation between aryl iodides and pinacols is presented. Pinacols are readily transformed by deprotonation with NaH to their Na-pinacolates. C–C-bond homolysis at room temperature generates in situ the corresponding Na-ketyl radical anions which react with various aryl iodides in a homolytic aromatic substitution reaction to form tertiary Na-alcoholates. Protonation
Electrophilic heterocycles: Functionalization with enol silyl ethers
作者:Grant P. Holmin、Jacob C. Hood、Hongfang Xue、Douglas A. Klumpp
DOI:10.1016/j.tet.2023.133511
日期:2023.8
A series of heterocyclic triaryl methanols were prepared and reacted with enolsilylethers in the presence of ZnCl2. This reaction gave a variety of functionalized heterocyclic products. A mechanism is proposed involving formation triaryl carbocation electrophiles with delocalization of positive charge to positions in the heterocyclic rings. Nucleophilic attack then occurs at a ring position of the