Chemistry of 1-aminoazetidin-2-ones and pyrazolidin-3-ones

The reaction of cyclohexanone azine with cyanoacetic acid‐acetic anhydride

“…The Reaction of Cyclohexanone Azine with Cyanoacetic Acid-acetic Anhydride 1515 spirocyclic carbon atom resonated at 63.3 ppm and the corresponding carbon in 15 [12] resonated at 62.3 ppm ( Figure 5). The structure of 14 was confirmed by an X-ray analysis, the details of which are given in the Experimental Section and a Chem3D representation of the molecule is shown in Figure 6.…”