An efficient, silver-induced tandem radical addition/cyclization for the synthesis of 3,4-dihydroquinolinones is presented, which exhibits a good functional group tolerance. The reaction is easy to operate and amenable to a multigram-scale synthesis. Additionally, this work illustrates the formation of a key skeleton for the synthesis of biologically interesting 3,4-dihydroquinolinone alkaloids.
Copper-catalyzed tandem oxidative cyclization of cinnamamides with benzyl hydrocarbons through cross-dehydrogenative coupling
作者:Shi-Liu Zhou、Li-Na Guo、Shun Wang、Xin-Hua Duan
DOI:10.1039/c4cc00637b
日期:——
The copper-catalyzed tandem oxidative cyclization of cinnamamides with benzyl hydrocarbons through the direct cross-dehydrogenative coupling of sp(3) and sp(2) C-H bonds has been developed. Satisfactorily, ethers, alcohols and alkanes could also be used instead of benzyl hydrocarbons in this transformation, which allows rapidaccess to diverse dihydroquinolinones in one step.
Silver-Catalyzed Cascade Radical Cyclization: A Direct Approach to 3,4-Disubstituted Dihydroquinolin-2(1<i>H</i>)-ones through Activation of the P–H Bond and Functionalization of the C(sp<sup>2</sup>)–H Bond
A silver-catalyzed cascade cyclization of cinnamamides with diphenylphosphine oxide was developed, in which activation of the P–H bond and functionalization of the C(sp2)–H bond occurred. A direct method for the synthesis of 3,4-disubstituted dihydroquinolin-2(1H)-ones was developed.