“…Therefore, it is not surprising that further we studied the structures combined two pharmacologically important fragments in one molecule, namely 4-hydroxyquinolin-2-one and propanoic acid. As one of the variants for the practical solution of this task we suggested 3-(3-alkylсarbamoyl-4-hydroxy-2-oxo-1,2-dihydroquinolin-1-yl)propanenitriles (32) that are easily avaliable synthetically [77,78]; as a rule, in the conditions of alkaline hydrolysis they give the corresponding 3-(3-alkylсarbamoyl-4-hydroxy-2-oxo-1,2-dihydroquinolin-1-yl)propanoic acids with good yields (33, Figure 25) [78].…”