SYNTHESIS OF SOME TETRAHYDRO-3, 3′-BISQUNAZOLIN-4, 4′-DIONES

AKD Bhavani, PSN Reddy

Index: Bhavani, A. K. D.; Reddy, P. S. N. Organic Preparations and Procedures International, 1992 , vol. 24, # 1 p. 1 - 6

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Citation Number: 7

Abstract

3, 3'-Bisquinazolin4, 4'diones are excellent precursors for nitrogen centered free radicals. 1, 2-Bis (2-aminobenzoyI) hydrazine (1) provides an easy access to the synthesis of these dimers.'We now repon the preparation of some new tetrahydro-3, 3'-bisquinazolin-4, 4'dione derivatives from I. The reaction of 1 was carried out with a series of ketones in hot methanol containing p-toluenesulfonic acid (p-TsOH). Acetone, cyclopentanone and cyclohexanone ...