0
6. 5. 1997.
Selective and Efficient Transformation of 5,6,7,8‐Tetrahydro‐2H‐1‐ benzopyran‐2,5‐diones with Hydrazines to 5‐Hydrazono‐2H‐1‐benzopyran‐2‐ ones and Quinoline‐2,5‐diones. Extension to Related Systems.