60th communication on pyridine and quinoline derivatives. ... A proof is given that in the condensation product formed by the interaction of malonic ester and p-aminocrotonic acid ester, namely 2-methyl-4.6dihydroxypyridine- carboxylic acid ester, the CwH,-group occupies the 5-position. This was effected by exchanging the hydroxyl groups for chlorine atoms and subsequently replacing these atoms by hydrogen atoms. The structure of the resulting 2-methylpyridine- ...
