Directed γ-C(sp<sup>3</sup>)–H Alkylation of Carboxylic Acid Derivatives through Visible Light Photoredox Catalysis
作者:Dian-Feng Chen、John C. K. Chu、Tomislav Rovis
DOI:10.1021/jacs.7b09306
日期:2017.10.25
Visible light photoredox catalysis enables direct γ- C(sp3)-H alkylation of saturated aliphatic carbonyl compounds. Electron-deficient alkenes are used as the coupling partners in this reaction. Distinguished site selectivity is controlled by the predominant 1,5-hydrogen atom transfer of an amidyl radical generated in situ.
γ,δ,ε-C(sp<sup>3</sup>)–H Functionalization through Directed Radical H-Abstraction
作者:Tao Liu、Tian-Sheng Mei、Jin-Quan Yu
DOI:10.1021/jacs.5b02065
日期:2015.5.13
Aliphatic amides are selectively functionalized at the γ- and δ-positions through directed radical 1,5 and 1,6 H-abstractions, respectively. The initially formed γ- or δ-lactams are intercepted by N-iodosuccinimide and trimethylsilyl azide, leading to double and triple C-H functionalizations at the γ-, δ-, and ε-positions. This new reactivity is exploited to convert alkyls into amino alcohols and allylic