The preparation,structure and reactions of some “malonyl-α-aminopyridines”

The reaction of several substituted 2-aminopyridines with diethyl malonate was studied. The “methylmalonyl-α-aminopyridines” were shown to exist in the same tautomeric form as “malonyl-α-aminopyridine”. Formylation of these compounds takes place in the 3-position and has led to the formation of a new tricyclic compound.