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
Compounds of Formula (I) that act as cannabinoid receptor ligands and their uses in the treatment of diseases linked to the modulation of the cannabinoid receptors in animals are described herein.
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Directed Ni-Catalyzed Reductive Arylation of Aliphatic C–H Bonds
作者:Zhi-Yun Liu、Silas P. Cook
DOI:10.1021/acs.orglett.2c00447
日期:2022.5.13
Herein, we describe the nickel-catalyzed reductive arylation of remote C(sp3)–Hbonds with aryl electrophiles. The reaction targets secondary and tertiaryC(sp3)–Hbonds to deliver all-carbonquaternarycenters. The success of this method relies on a novel amidyl radical precursor that tolerates reducing conditions, namely O-oxalate hydroxamic acid esters.