Enaminbildung aus 2‐Phenyl‐1,3‐indandionen und 1‐Phenylethylamin
Enamine Formation from 2-Phenyl-1,3-indandiones and 1-Phenylethylamine 
 
 
 
The acid-catalyzed condensation of 4-methoxy-2-phenyl-1,3-indandione (3b) and (R)-1-phenylethylamine yields the regioisomeric enamines 4b and 5 in a ratio of 75:25. The structure 4b is assigned to the major isomer by 1H-NMR spectroscopy and X-ray structure analysis.