Reactions of 2-Benzoselenopyrylium Salts with Hydrazine : A New Easy Access to 5H-2,3-Benzodiazepines

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概要

• 論文の詳細を見る

• While the solvent-free reactions of the 2-benzoselenopyrylium salts (9) with methyl- or phenylhydrazine afforded the 1-hydrazino-1H-isoselenochromenes (11, 12), the treatment of the salts (9) with anhydrous hydrazine in dry acetonitrile resulted in a ring transformation to give the 5H-2,3-benzodiazepines (13) in one-pot under mild conditions in moderate yields.

• 公益社団法人日本薬学会の論文
• 2005-01-01

著者

• Sashida H

  Hokuriku Univ. Kanazawa Jpn

• Sashida Haruki

  Faculty Of Pharmaceutical Sciences Hokuriku University

• Ohyanagi K

  Hokuriku Univ. Kanazawa Jpn

• OHYANAGI Kazuo

  Graduate School of Natural Science and Technology, Kanazawa University

関連論文

• Studies on Tellurium-Containing Heterocycles. Part 20. Reactions of 2-Benzoselenopyrylium Salts and 2-Benzotelluropyrylium Salts with Nucleophiles : Formation of 1-Functionalized 1H-Isoselenochronienes and 1H-Isotellurochromenes
• Studies on Tellurium-Containing Heterocycles. Part 22. Tellurazepine Ring System : Preparation of 1,5-Benzotellurazepin-4-ones and Their Conversion into Fully Unsaturated 1,5-Benzotellurazepines
• An Alternative Convenient Synthesis of Piperidazine-3-carboxylic Acid Derivatives
• Ruthenium tetroxide oxidation of N,N'-diBochexahydropyridazines
• An Efficient Transformation of Cyclic Ene-carbamates into ω-(N-Formylamino) carboxylic Acids by Ruthenium Tetroxide Oxidation
• Reactions of 2-Benzoselenopyrylium Salts with Hydrazine : A New Easy Access to 5H-2,3-Benzodiazepines
• Thermal Ring Expansion of 2-Azidoselenochromenes : First Synthetic Examples of 1, 3-Benzoselenazepines
• A Simple and Practical Preparation of 2,4-Disubstituted 1-Bensotelluropyrylium Salts

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