Solvent-free mechanochemical and one-pot reductive benzylizations of malononitrile and 4-methylaniline using Hantzsch 1,4-dihydropyridine as the reductant
作者:Ze Zhang、Jie Gao、Jing-Jing Xia、Guan-Wu Wang
DOI:10.1039/b502662h
日期:——
Under mechanical milling conditions, direct reductive benzylizations of malononitrile and 4-methylaniline by aromatic aldehydes were achieved using a Hantzsch 1,4-dihydropyridine as the reductant.
Ethynyl Ketene-<i>S</i>,<i>S</i>-acetals: The Highly Reactive Electron-Rich Dienophiles and Applications in the Synthesis of 4-Functionalized Quinolines via a One-Pot Three-Component Reaction
作者:Yu-Long Zhao、Wei Zhang、Shuang Wang、Qun Liu
DOI:10.1021/jo070069q
日期:2007.6.1
An efficient synthetic method for 4-functionalized quinoline derivatives, 4-((1,3-dithian-2-ylidene)methyl)quinolines, has been developed. Mediated by trifluoromethanesulfonic acid, ethynyl ketene-S,S-acetals can react in a one-pot procedure with various arylamines and aldehydes under mild conditions to give the corresponding quinoline derivatives in good to high yields via a consecutive arylimine formation, regiospecific aza-Diels-Alder (Povarov) reaction, and reductive amination.
5. The benzylation of amines. Part IV. The rate of reaction of benzyl bromide with nitrobenzylaniline and some derivatives