Three-Component One-Pot Synthesis of Unsymmetrical 1,4-dihydropyridine Derivatives in Aqueous Media
作者:Da-Qing Shi、Chen-Xia Yu、Qi-Ya Zhuang
DOI:10.3184/030823408x339791
日期:2008.8
A series of methyl ethyl 2,6-dimethyl-4-substituted-1,4-dihydropyridine-3,5-dicarboxylates were synthesised by the three-component reaction of aldehydes, ethyl acetoacetate and methyl β-aminocrotonate in the presence of triethylbenzylammonium chloride (TEBAC) in aqueous medium. This method has the advantage of good yields.
Oxidative aromatization of Hantzsch 1,4-dihydropyridines by cupric bromide under mild heterogeneous condition
作者:Forid Saikh、Rimpa De、Somnath Ghosh
DOI:10.1016/j.tetlet.2014.09.025
日期:2014.11
A mild heterogeneous oxidizing agent, cupricbromide has been utilized for the oxidative aromatization of Hantzsch 1,4-dihydropyridines to the corresponding pyridine derivatives in excellent yields with the isolation of products by simple work-up procedure.