Synthesis of boron chelates from N-(pyrid-2-YL)- and (N-4-methylpyrid-2-YL) cyanoacetamides and their tautomeric transformations

Chelate complexes in which the boron atom is bound to the pyridine N atom and the O atom of the deprotonated ligand were synthesized by reaction of N-(pyrid-2-yl)- and N-(4-methylpyrid-2-yl) cyanoacetamides. A new type of intrachelate tautomeric transformation was discovered: the complexes obtained can exist in solutions in the form of two tautomers, which are derivatives of acetimidic acid or the corresponding ketene N,O-acetals.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 164–168, January, 1991.