Novel Pyridine-Based Hydroxamates and 2'-Aminoanilides as Histone Deacetylase Inhibitors: Biochemical Profile and Anticancer Activity
Starting from the N-hydroxy-3-(4-(2-phenylbutanoyl)amino)phenyl)acrylamide 5b previously described by us as HDAC inhibitor, we prepared four aza-analogues of 5b (6-8, 9b) as regioisomers containing the pyridine nucleus. A preliminary screening against mHDAC1 highlighted the N-hydroxy-5-(2-(2-phenylbutanoyl)amino)pyridyl)acrylamide 9b as the most potent inhibitor. Thus, we further developed both pyridylacrylic- and nicotinic-based hydroxamates (9a, 9c-f, and 11a-f) and 2'-aminoanilides (10a-f and 12a-f), related to 9b, to be tested against HDACs.