α-Arylation of Silyl Enol Ethers via Rhodium(III)-Catalyzed C–H Functionalization
作者:Xuezhen Kou、Kevin G. M. Kou
DOI:10.1021/acscatal.9b05622
日期:2020.3.6
Carbon–hydrogen (C–H) bond functionalization streamlines synthesis by increasing step- and atom-economies. This approach, catalyzed by Rh(III), is combined with the α-arylation of ketone-derived silyl enol ethers to achieve a direct cross-coupling event. The advancement of electron-rich alkenes as substrates is enabled through the use of a silver additive and complements existing C–H activation methods
One-Pot Formation of CC and CN Bonds through Palladium-Catalyzed Dual CH Activation: Synthesis of Phenanthridinones
作者:Guan-Wu Wang、Ting-Ting Yuan、Dan-Dan Li
DOI:10.1002/anie.201005874
日期:2011.2.7
Two cycles in one pot! The synthesis of biologically important phenanthridinones has been achieved by the one‐pot formation of CC and CN bonds through a palladium‐catalyzed dual CHactivation, which involves four bond ruptures and two bond formations (see scheme). The conversion of phenanthridinones into natural product like derivatives further demonstrates the utility of this synthetic achievement
Tandem Catalysis: Rh(III)-Catalyzed C–H Allylation/Pd(II)-Catalyzed <i>N</i>-Allylation Toward the Synthesis of Vinyl-Substituted <i>N</i>-Heterocycles
作者:Shang-Shi Zhang、Jia-Qiang Wu、Xuge Liu、Honggen Wang
DOI:10.1021/cs501601c
日期:2015.1.2
Tandemcatalysis by Rh(III)/Pd(II) was realized, enabling rapid access to two important N-heterocycles that bear a synthetically valuable vinyl substituent. The reaction occurred under mild reaction conditions and was easy to handle. Good substrate scope and high regio- and stereoselectivities were observed. The vinyl group was demonstrated to be a reliable handle for functional group interconversions
Imidazoquinoline compounds with an oxime substituent at the 1-position, pharmaceutical compositions containing the compounds, intermediates, and methods of use of these compounds as immunomodulators, for inducing cytokine biosynthesis in animals and in the treatment of diseases including viral and neoplastic diseases are disclosed.
Palladium-Catalyzed Alkoxylation of <i>N</i>-Methoxybenzamides via Direct sp<sup>2</sup> C−H Bond Activation
作者:Guan-Wu Wang、Ting-Ting Yuan
DOI:10.1021/jo902139b
日期:2010.1.15
The palladium-catalyzed ortho-alkoxylation of N-methoxybenzamides has been demonstrated. With the CON-HOMe group as a directing group, the aromatic C-H bond can be functionalized efficiently to generate ortho-alkoxylated derivatives in moderate to good yields.