1.1- Enediamines from carbodiimides

Carbodiimides serve well in the 1,1-enediamine synthesis due to the 1,3-diazo arrangement in its structure. An earlier report on the preparation of 1,1-enediamines from carbodiimides appeared in 1965 by Gompper and Kunz98. In the presence of base, carbon acids add to carbodiimides 79 to give enediamines 80 in moderate to excellent yields (equation 26)98,99. Due to the structural feature of carbodiimides, only acyclic 1,1-enediamines can be expected. However, cyclic structures at the jS-carbon atom (80a) were also obtained. 

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