cinnamaldehydes, anilines and 2-keto esters in methanol. The synthesized compounds were screened for their antidyslipidemic and antioxidant activity in vivo and in vitro. Compounds 2a, 2g, and 2l have exhibited promising lipid and TG lowering activity, whereas compounds 2m and 2n have showed potent antioxidant activity.
A new three-component domino synthesis of 1,4-dihydropyridines
作者:Vellaisamy Sridharan、Paramasivan T. Perumal、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1016/j.tet.2007.03.092
日期:2007.5
three-component domino reaction between aromatic amines, α,β-unsaturatedaldehydes, and ethyl acetoacetate, providing an efficient new entry into 1,4-dihydropyridines. This new reaction requires very mild reaction conditions, has water as the only side product and is complementary to the classical Hantzsch synthesis in that it is well suited to the preparation of N-aryl-5,6-unsubstituted dihydropyridines. Experiments
Organocatalysed three-component domino synthesis of 1,4-dihydropyridines under solvent free conditions
作者:Atul Kumar、Ram Awatar Maurya
DOI:10.1016/j.tet.2008.02.022
日期:2008.4
An organocatalysed protocol for one-pot synthesis of 1,4-dihydropyridines via three-component coupling of cinnamaldehyde, aniline and beta-keto esters under solvent free conditions at ambient temperature is reported. The reaction is generally very fast and the products are obtained in high yield. The catalytic activity of small organic molecules like amino acids (acidic, basic and neutral), ephedrine and cinchona alkaloids was studied. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis of Unsymmetrical Substituted 1,4-Dihydropyridines through Thermal and Microwave Assisted [4+2] Cycloadditions of 1-Azadienes and Allenic Esters
作者:Lakhwinder Singh、M. P. Singh Ishar、Munusamy Elango、Venkatesan Subramanian、Vivek Gupta、Priyanka Kanwal
DOI:10.1021/jo702548b
日期:2008.3.1
Thermal and microwave assisted [4+2] cycloadditions of 1,4-diaryl-1-aza-1,3-butadienes with allenic esters lead to cycloadducts, which after a 1,3-H shift afford variedly substitutedunsymmetrical 2-alkyl-1,4-diaryl-3-ethoxycarbonyl-1,4-dihydropyridines in high yields. Reactions carried out under microwave irradiation are cleaner and give higher yields with much shortened reaction times. Density functional