Nitropyridines. 8.* synthesis of substituted 5-nitronicotinamides
Previously unreported nitriles of 5-nitronicotinic acid were synthesized by various types of cyclocondensation using nitrocarbonyl compounds and their derivatives. The partial hydrolysis of these nitriles in concentrated sulfuric acid and in alkali solution in the presence of hydrogen peroxide leads to nitronicotinamides.