Farbstoffsensibilisierte Photo-Oxygenierung von 6,6-Dimethylfulven. Eine neue 1,2-Dioxolan-Umlagerung
作者:W. Skorianetz、K. H. SchulteW-Elte、G. Ohloff
DOI:10.1002/hlca.19710540720
日期:1971.11.1
The dye sensitized photo-oxygenation of 6,6-dimethylfulvene (1) in solution at 15° gives enol lactone 2, along with ketoles 3 and 4. The following mechanism is proposed: initially formed endoperoxide 11 undergoes a 1,2-dioxolan rearrangement to give allen epoxide 12, which then isomerizes to cyclopropanone 13. 13 can then cyclise to give 2 and 3.
溶液中的6,6-二甲基富勒烯(1)在15°时进行染料敏化的光氧氧化,得到烯醇内酯2以及缩酮3和4。提出了以下机理:最初形成的内过氧化物11进行1,2-二氧戊环重排得到环戊烯环氧化物12,然后异构化为环丙烷酮13。然后可以环化13,得到2和3。