3-Substituted 3,4-dihydro-4-imino-1,2,3-benzotriazines (1) rearrange to the isomeric substituted 4-amino-1,2,3-benzotriazines (2) in acetic acid regardless of the nature of the 3-substituent. 3-Substituted 4-arylimino-3,4-dihydro-1,2,3-benzotriazines (4) are stable in acetic acid.
M. S. S. Siddiqui and M. F. G. Stevens, J. Chem. Soc., Perkin Trans. 1, 1974, 609 DOI: 10.1039/P19740000609
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