Direct Observation of Dienol Intermediates in Photochemical Deconjugation of an α,β-Uusaturated Ketone. Photoisomerization of 1-Acetylcyclooctene
作者:Ryoji Noyori、Hiroshi Inoue、Masao Katô
DOI:10.1246/bcsj.49.3673
日期:1976.12
The photolysis of 1-acetylcyclooctene in acetonitrile solution leads to 3-(α-hydroxyethylidene)cyclooctene (two stereoisomers). Structures of the stable 1,3-dienols have been elucidated on the basis of their spectral data and chemical behavior. The dienols are highly air-sensitive. Upon heating, or by the action of an acid or base, they are converted to 3-acetylcyclooctene. In methanol-O-d, 3-acetylcyclooctene-3-d
1-乙酰环辛烯在乙腈溶液中的光解产生 3-(α-羟基亚乙基)环辛烯(两种立体异构体)。已根据光谱数据和化学行为阐明了稳定的 1,3-二烯醇的结构。二烯醇对空气高度敏感。加热或在酸或碱的作用下,它们转化为 3-乙酰环辛烯。在甲醇-Od 中,形成 3-乙酰环辛烯-3-d。这些发现为 1,3-二烯醇中间体在 α,β-不饱和酮光化学解偶联成 β,γ 异构体中的干预提供了第一个明确的证据。