Studies on Xanthenyl and Thioxanthenyl Derivatives. Reactions of Xanthenyl and Thioxanthenyl Halides with Substituted-Ethylenes

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概要

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• Xanthenyl and thioxanthenyl chlorides (<B>1</B>) were added to 1,1-bis-(<I>p</I>-alkoxyphenyl)-2-substituted-ethylenes (<B>2</B>) to give 1,1-bis-(<I>p</I>-alkoxyphenyl)-2-substituted-2-[xanthen(or thioxanthen)-9-yl]ethylenes (<B>3</B>). The 2-nitroderivatives (<B>3</B>) were converted in boiling methanolic potassium hydroxide into the allenes, 1,1-bis-(<I>p</I>-alkoxyphenyl)-2-[xanthen(or thioxanthen)-9-ylidene]ethylenes (<B>4</B>). The 2-methyl(or chloro)-derivatives (<B>3</B>) reacted with bromine in the presence of hydrogen bromide, to yield xanthylium or thioxanthylium tribromide (<B>5</B>) and the corresponding 2,2-disubstituted-ethylene (<B>6</B>). The tribromides (<B>5</B>) reacted with the ethylene (<B>2</B>, Z=H to give, after spontaneous dehydrobromination, the corresponding 2-bromo-derivatives (<B>3</B>, Z=Br).

• 公益社団法人 日本化学会の論文

著者

• Abdul-Malik Nadia

  Department of Chemistry, Faculty of Science, University of Cairo

• Abdou Sadek

  Department of Chemistry, Faculty of Science, University of Cairo

• Awad Sami

  Department of Chemistry, Faculty of Science, University of Cairo

関連論文

• Studies on Xanthenyl and Thioxanthenyl Derivatives. Reactions of Xanthenyl and Thioxanthenyl Halides with Substituted-Ethylenes
• Studies on xanthylium salts. Behaviour of 9-vinylidenexanthenes in acid media.

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