Reaction of 2-halofluoroalkyl-containing β-ketoesters with N-dinucleophiles

During the reaction of hydrazines and o-phenylenediamine with 2-halosubstituted (3-keto-esters, including fluoroalkyl substituted, two reaction paths are realized; substitution of the halogen atoms in position 2 by hydrogen and condensation with formation of various compounds depending on the structure of the starting β-ketoester and dinucleophile.