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  • 标题:ELECTROCYCLIZATION REACTION OF HIGHER CON-JUGATED POLYENALS: PHOTOCHEMICAL BEHAVIORS OF RETINAL (VITAMIN A1 ALDEHYDE) HOMOLOGUES
  • 本地全文:下载
  • 作者:Kiyoshi TSUKIDA ; Masayoshi ITO ; Akiko KODAMA
  • 期刊名称:Journal of Nutritional Science and Vitaminology
  • 印刷版ISSN:0301-4800
  • 电子版ISSN:1881-7742
  • 出版年度:1978
  • 卷号:24
  • 期号:2
  • 页码:143-148
  • DOI:10.3177/jnsv.24.143
  • 出版社:Center for Academic Publications Japan
  • 摘要:During the studies on a photoreaction of retinal, involving various kinds of ( Z )-( E ) isomerization, a heretofore unknown photo product of retinal was isolated in a pure state and was characterized unambiguously. Thus, direct irradiation of all-( E )-retinal (I) and of all-( E )-β-ionylidenecrotonaldehyde (II) in acetonitrile solution gave the corresponding 6e-electrocyclized photoproducts, (III) and (IV), both via the possible 7-( Z )-isomer intermediates of the parent conjugated poly enals. Unlike the lower members in the retinal series, it was also con firmed that sigmatropic rearrangement or photo-Diels-Alder reaction hardly proceeds in these higher members of the series mentioned above.
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