1H-NMR study on the tautomer ratios between the hydrazone imine and diazenylenamine forms in 3-(arylhydrazono)-methyl-2-oxo-1,2-dihydroquinoxalines

Journal of Heterocyclic Chemistry

Volumn 33, Issue 2, 1996, Pages 421-425

  Kurasawa, Yoshihisa ^a   Takano, Akiko ^a   Kato, Kyoko ^a   Takada, Atsushi ^a   Kim, Ho Sik ^b   Okamoto, Yoshihisa ^a  

^a KITASATO UNIVERSITY   (Japan)

^b Catholic University of Daegu   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

QUINOXALINE DERIVATIVE;

ARTICLE; DRUG STRUCTURE; DRUG SYNTHESIS; NUCLEAR MAGNETIC RESONANCE;

EID: 0029941734     PISSN: 0022152X     EISSN: None     Source Type: Journal    
DOI: 10.1002/jhet.5570330234     Document Type: Article

References (11)

1. Y. Kurasawa, T. Hosaka, K. Ikeda, Y. Matsumoto, A. Ishikura, A. Takada, H. S. Kim, and Y. Okamoto, J. Heterocyclic Chem., 31, 527 (1994).
2. Y. Kurasawa, T. Hosaka, A. Takada, H. S. Kim, and Y. Okamoto, J. Heterocyclic Chem., 31, 1661 (1994).
3. Y. Kurasawa, T. Hosaka, A. Takada, H. S. Kim, and Y. Okamoto, J. Heterocyclic Chem., 32, 351 (1995).
4. Y. Kurasawa, T. Hosaka, A. Takada, H. S. Kim, and Y. Okamoto, J. Heterocyclic Chem , 32, 445 (1995).
5. H. S. Kim, Y. Kurasawa, and A. Takada, J. Heterocyclic Chem., 26, 1129 (1989).
6. The tautomer ratio of A to B calculted from the integral ratios of the NH proton signals in reference [5] was inferior in accuracy to that calculated from the integral ratio of the CH proton signals in the present investigation.
7. Y. Kurasawa, K. Yamazaki, S. Tajima, Y. Okamoto, and A. Takada, J. Heterocyclic Chem., 23, 957 (1986).
8. Y. Kurasawa, M. Muramatsu, K. Yamazaki, S. Tajima, Y. Okamoto, and A. Takada, J. Heterocyclic Chem., 23, 1379 (1986).
9. Y. Kurasawa, M. Muramatsu, K. Yamazaki, S. Tajima, Y. Okamoto, and A. Takada, J. Heterocyclic Chem., 23, 1245 (1986).
10. Y. Kurasawa, M. Muramatsu, Y. Okamoto, and A. Takada, J. Heterocyclic Chem., 23, 637 (1986).
11. Y. Kurasawa, H. S. Kim, K. Yonekura, A. Takada, and Y. Okamoto, J. Heterocyclic Chem., 26, 867 (1989).