Condensation and cyclization reactions of 2-hydrazinobenzimidazole, -benzoxazole, and -benzothiazole.

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概要

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• 2-Hydrazinobenzoxazole (<B>1</B>), -benzimidazole (<B>2</B>), and benzothiazole (<B>3</B>) were condensed with ethyl chloroformate and/or diethyl oxalate to produce, 1,2,4-triazolo- and 1,2,4-triazino-fused ketones of the title azoles respectively. Condensation of <B>1</B> and <B>2</B> with aromatic aldehydes and/or acetic anhydride produced, 3-aryl- and 3-methyl-substituted 1,2,4-triazolo-fused azoles respectively. The hydrazines <B>1</B> and <B>2</B> cyclized with acetylacetone to produce the corresponding 2-(1-pyrazolyl) derivatives. 2-Acetylthiazolobenzimidazole reacted with hydroxylamine and/or alkylamines, to produce the corresponding condensation products. Also it condensed with aromatic aldehydes to give the chalcones. When reacted with benzenediazonium salt, it gave the corresponding 2-arylazo-substituted compounds.

• 公益社団法人 日本化学会の論文

著者

• Badr M.

  Chemistry Department, Faculty of Science, Assiut University

• Mahmoud A.

  Chemistry Department, Faculty of Science, Assiut University

• Mahgoub S.

  Chemistry Department, Faculty of Science, Assiut University

• Hozien Z.

  Chemistry Department, Faculty of Science, Assiut University

関連論文

• Molecular rearrangements. XXIX. Thermolysis of aromatic ketoximes.
• Condensation and cyclization reactions of 2-hydrazinobenzimidazole, -benzoxazole, and -benzothiazole.
• Molecular rearrangements. XXVIII. Thermolysis and photolysis of some hydroxamic acid derivatives.

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