Palladium-Catalyzed Base-Promoted Arylation of Unactivated C(sp<sup>3</sup>)-H Bonds by Aryl Iodides: A Practical Approach To Synthesize β-Aryl Carboxylic Acid Derivatives
A highly efficientprotocol for the β-arylation of carboxylicamides by aryl iodides under PdCl2(CH3CN)2/CsOAc catalysis was developed. This method was found to tolerate a broad scope of substrates and was successfully employed in the preparation of a variety of β-aryl α-amino and γ-amino acid derivatives. The utility of this method was further illustrated in the synthesis of the psychotropic drug
We have developed a sulfur‐modified, gold‐supported palladium material (SAuPd) with palladium, Pd, nanoparticles on its surface; it is a recyclable, low‐leaching Pd catalyst. Here we report, using SAuPd, the first example of Pd nanoparticle‐catalyzed, unactivated C(sp3)Hbondfunctionalization of amides, using 8‐aminoquinoline as a directing group, to yield ethynylated products. The low leaching properties
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.