A chemoselective synthesis of novel indolizine derivatives were reported via three-component reactions of aminopyridines, acetylenic diesters and a-halo ketones. In these reactions, the zwitterion generated from amino...A chemoselective synthesis of novel indolizine derivatives were reported via three-component reactions of aminopyridines, acetylenic diesters and a-halo ketones. In these reactions, the zwitterion generated from aminopyridines and acetylenic diesters reacted with a-halo ketones to produce indolizine skeleton in good to high yields under mild reaction conditions.展开更多
Cyanopyridine was at first catalytically hydrolyzed to give isonicotinamide in the presence of Mg-Fe oxides with yield 92%. 4-Aminopyridine was obtained from isonicotinamide in yield of 83%～85% by Hofmann reaction us...Cyanopyridine was at first catalytically hydrolyzed to give isonicotinamide in the presence of Mg-Fe oxides with yield 92%. 4-Aminopyridine was obtained from isonicotinamide in yield of 83%～85% by Hofmann reaction using iodo-benzene as catalyst. All of the reaction were monitored by TLC and the products were confirmed by IR, NMR and melting point determination.展开更多
The three-component reaction of 4-hydroxy-l-methyl-2（1H）-quinolinone, aromatic aldehydes and ethyl cyanoacetate was carried out in the presence of a catalytic amount of 4-dimethyl aminopyridine （DMAP） in aqueous e...The three-component reaction of 4-hydroxy-l-methyl-2（1H）-quinolinone, aromatic aldehydes and ethyl cyanoacetate was carried out in the presence of a catalytic amount of 4-dimethyl aminopyridine （DMAP） in aqueous ethanol. The reactions result in the formation of pyranoquinoline derivatives in excellent yields. Antibacterial activity has been evaluated against Gram positive and Gram negative bacteria for some of the synthesized compounds. The results indicated that these compounds are moderately effective against bacterial growth and their effectiveness is highest against Pseudomonas aeruginosa.展开更多
基金supported by the Research Council of the University of Mazandaran,Iran
文摘A chemoselective synthesis of novel indolizine derivatives were reported via three-component reactions of aminopyridines, acetylenic diesters and a-halo ketones. In these reactions, the zwitterion generated from aminopyridines and acetylenic diesters reacted with a-halo ketones to produce indolizine skeleton in good to high yields under mild reaction conditions.
文摘Cyanopyridine was at first catalytically hydrolyzed to give isonicotinamide in the presence of Mg-Fe oxides with yield 92%. 4-Aminopyridine was obtained from isonicotinamide in yield of 83%～85% by Hofmann reaction using iodo-benzene as catalyst. All of the reaction were monitored by TLC and the products were confirmed by IR, NMR and melting point determination.
基金supported by the Research Council of the University of Mazandaran in Iran
文摘The three-component reaction of 4-hydroxy-l-methyl-2（1H）-quinolinone, aromatic aldehydes and ethyl cyanoacetate was carried out in the presence of a catalytic amount of 4-dimethyl aminopyridine （DMAP） in aqueous ethanol. The reactions result in the formation of pyranoquinoline derivatives in excellent yields. Antibacterial activity has been evaluated against Gram positive and Gram negative bacteria for some of the synthesized compounds. The results indicated that these compounds are moderately effective against bacterial growth and their effectiveness is highest against Pseudomonas aeruginosa.
