Effect of spiro ring size on the photochemical ring expansion of dispiro substituted cyclobutane-1,3-diones.

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概要

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• The photochemical ring expansion of dispiro substituted cyclobutane-1,3-diones in methanol has been investigated. The formation of ring expansion product was strongly dependent on the spiro ring size of dispiro substituent. The ring expanded acetal was obtained in a low yield when the spiro ring of dispiro substituted cyclobutane-1,3-diones was a five- or seven-membered ring. This is the first example of photochemical ring expansion from cyclobutane-1,3-diones. A mechanism is postulated.

• 公益社団法人 日本化学会の論文

著者

• Fukuda Yoshihiro

  Department Of Clinical Nutrition And Health Science Hyogo College Of Medicine

• Odaira Yoshinobu

  Department Of Applied Fine Chemistry Faculty Of Engineering Osaka University

• Kimura Koji

  Department Of Animal Breeding And Reproduction National Institute Of Livestock And Grassland Science

• Koshibe Shigeru

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Juro Masayoshi

  Department of Petroleum Chemistry, Faculty of Engineering, Osaka University

• Koshibe Shigeru

  Department of Petroleum Chemistry, Faculty of Engineering, Osaka University

• Takamura Masakazu

  Department of Petroleum Chemistry, Faculty of Engineering, Osaka University

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