Synthesis of novel heterocyclic ketene amines

Heterocyclic ketene amines are versatile synptoms in organic chemistry and are often used to synthesize a variety of condensed heterocyclic compounds which is not easily synthesized by conventional methods. In order to study the effect of the structure of heterocyclic ketene amines on their performance, novel heterocyclic ketene amines were synthesized by the reaction of ethylene diamine or propylene diamine with ketene dithioacetals derived from 1, 3-cyclohexanedione.