Reactions of 3-acetyl-2-aminotropones and 2-acetyl-7-aminotropones with hydrazine |
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| Authors: | Kimiaki Imafuku Akiko Shimazu |
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| Institution: | Department of Chemistry, Faculty of Science, Kumamoto University, Kurokami, Kumamoto 860, Japan |
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| Abstract: | 3-Acetyl-2-aminotropone ( 1a ) reacted with hydrazine to afford its hydrazone ( 3a ) and 3-methyl-1,8-dihydrocycloheptapyrazol-8-one ( 4 ), while methylamino- and pyrrolidinyl-substituted compounds 1b and 1c gave only the cyclized compound ( 4 ). Reactions of 2-acetyl-7-aminotropones 2a-d gave their hydrazones 5a-d and the hydrazone 6 . The hydrazones 3a and 5b were heated in acetic acid to give 4 and 3-methyl-8-methylamino-1,2-diazaazulene ( 7 ), respectively. Several reactions of 4 and 6 were also described. |
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