Tautomerism of 2-Hydroxy-1, 3-diazaazulene

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概要

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• This is a study of the lactim-lactam type tautomerism of 2-hydroxy-1, 3-diaza-azulene (I). 2-Hydroxy-1, 3-diazaazulene (I)^<1, 2>), obtained by hydrolysis of 2-amino-^<3)> or 2-mer-capto-1, 3-diazaazulene^<1)> with hydrochloric acid, is considered to be present in the so-called lactim-lactam type tautomers (Ia and Ib). This is certain from the fact that two kinds of methylated products, O-methyl (IIa) and N-methyl compounds (IIb)^<2)>, are obtained on methylation of I with diazomethane. I is easily soluble in dilute acids and alkalis, is not colored by ferric chloride, and reacts with ketonic reagents such as 2, 4-dinitrophenylhydrazine to form a hydrazone^<1)>. Results of examinations on the ultraviolet and infrared absorption spectra, and methylation of I are described in this paper.

著者

• Murata Ichiro

  The Chemical Research Institute Of Non-aqueous Solutions

• Murata I.

  The Chemical Research Institute of Non-Aqueous Solutions

関連論文

• Tautomerism of 2-Hydroxy-1, 3-diazaazulene
• Studies on the Mechanism of Rearrangement Reaction of 2-Phenyl-4-bromotropone to 2-Phenylbenzoic Acid

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