ABSTRACT
A novel method for the synthesis of 2 or 3-substituted 5,6-dihydro-6,11-dioxo-morphanthridines (2) involving the cyclisation of anilinic acid (1) with PPA/AcOH has been developed. A new heterocyclic system, 2 or 3-Substituted 5,6,11,12-tetrahydrodibenzo[b, f] [1,4]diazocine-6,11-diones (4) has been synthesized with excellent yields.
ACKNOWLEDGMENT
We thank Dr. Y. B. Vibhute, Yeshwant Mahavidhylaya Nanded, Dr. W. N. Jadhav, Dnyanopasak College, Parbhani and Dr. P. P. Wadgaonkar, NCL, Pune for their valuable suggestions.