Direct Arylation of Primary and Secondary sp<sup>3</sup> C–H Bonds with Diarylhyperiodonium Salts via Pd Catalysis
作者:Fei Pan、Peng-Xiang Shen、Li-Sheng Zhang、Xin Wang、Zhang-Jie Shi
DOI:10.1021/ol402116a
日期:2013.9.20
Palladium-catalyzed primary and secondary sp3 C–H bond arylation is reported. The method using diarylhyperiodonium salts as arylation reagents shows good functional group tolerance and proceeds under mild reaction conditions. The KIE experiments show that the C–H bond activation is the rate-determining step.
Palladium-Catalyzed Cs<sub>2</sub>CO<sub>3</sub>-Promoted Arylation of Unactivated C(sp<sup>3</sup>)–H Bonds by (Diacetoxyiodo)arenes: Shifting the Reactivity of (Diacetoxyiodo)arenes from Acetoxylation to Arylation
作者:Quan Gou、Zhao-Fu Zhang、Zhi-Cheng Liu、Jun Qin
DOI:10.1021/acs.joc.5b00111
日期:2015.3.20
PdCl2(CH3CN)(2)-catalyzed arylation of unactivated C(sp(3))-H bonds using (diacetoxyiodo)arenes as arylation reagents is reported. The reactivity of (diacetoxyiodo)arenes as arylation reagents is enabled in the presence of Cs2CO3 under the reaction conditions. This arylation method is highly efficient and occurs without the use of silver salt. The reaction tolerates a broad substrate scope that was not demonstrated by other silver salt-free C(sp(3))-H bond arylation conditions. The synthetic utility of the method is further illustrated in the synthesis of the psychotropic drug phenibut. A detailed mechanism study has been conducted to understand the reaction pathway.