Oligomers from the reaction of 1,2-diaminoethane and malonic acid derivatives - no formation of 1,4-diaza-5,7-cycloheptanedione

Abstract

The reaction of 1,2-diaminoethane (5) with malonic acid derivatives (6, 7, 8, 10) gives oligo- and polymers that were characterized by MALDI-ToF mass spectrometry. Literature reports that claimed the formation of the title compound in these reactions were critically evaluated and could not be confirmed.