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N-Ethyl substituted 2-nitrophenylguanidines. 2. Cyclization

P. Pazdera and M. Potáček

Department of Organic Chemistry, Faculty of Natural Sciences, J. E. Purkyně University, CS-611 37 Brno


Abstract: N-Ethyl substituted 2-nitrophenylguanidines underwent under treatment with a base either in a boiling aqueous medium or in DMF at the tem­perature of 100°C cyclization. to corresponding substituted 1,2,4-benzotriazine 1-oxides. The products the structure of which was proved by the comparison with compounds synthesized in independent synthesis and by spectral methods, showed that the cyclization can proceed only when an unsubstituted amino or imino group of the guanidine part of molecule is at disposal to the interaction with nitro group.

Full paper in Portable Document Format: 431a107.pdf


Chemical Papers 43 (1) 107–112 (1989)

Tuesday, November 12, 2019

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