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.
A Pd(II)-catalyzed α,β-dehydrogenation of substituted aliphaticamides assisted by a reusable bis-chelating 8-aminoquinoline ligand is demonstrated. Broad spectra of β-substituted including olefin-substituted aliphaticamides are well tolerated. The present protocol efficiently dehydrogenates the less acidic aliphaticamides via the chelation-assisted β-C–H bond activation and replaces the traditional