A Convenient Synthesis of 5-Cyano-6-dialkylamino-2-hydroxy-3-methoxycarbonyl-2-methyl-4-(2- or 4-nitrophenyl)-1,2,3,4-tetrahydropyridines and their Dehydration to 5-Cyano-6-dialkylamino-3-methoxycarbonyl-2-methyl-4-(2- or 4-nitrophenyl)-1,4-dihydropyridines
A Convenient Synthesis of 5-Cyano-6-dialkylamino-2-hydroxy-3-methoxycarbonyl-2-methyl-4-(2- or 4-nitrophenyl)-1,2,3,4-tetrahydropyridines and their Dehydration to 5-Cyano-6-dialkylamino-3-methoxycarbonyl-2-methyl-4-(2- or 4-nitrophenyl)-1,4-dihydropyridines
作者:France Laure、Jean-Claude Pascal
DOI:10.1055/s-1989-27374
日期:——
The reaction of cyanoacetamidines with methyl 2-[(nitrophenyl)methylene]-3-oxobutanoates leads to 2-hydroxy-1,2,3,4-tetrahydropyridines in high yields. These compounds can be dehydrated to 1,4-dihydropyridines by heating in benzene containing a catalytic amount of p toluenesulfonic acid.