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.