作者:T. Matsuura、K. Ogura
DOI:10.1016/s0040-4020(01)96349-5
日期:1968.1
The UV irradiation of 2,4,6-tri-t-butyl-4-hydroxy-2,5-cyclohexadienone (I) in petroleum ether yielded the diketone V (11%) and the enedione VII (54%) in addition to the cyclopentenone VIII (3%) and the bicyclopentanone X (8%). The formation of V and VII can be rationalized by considering a common intermediate, the lumi-type ketone III. This result indicates that 4-hydroxy-2,5-cyclohexadienones undergo
在石油醚中对2,4,6-三叔丁基-4-羟基-2,5-环己二酮(I)进行紫外线照射,除生成二酮V(11%)和二烯二酮VII(54%)外,环戊烯酮VIII(3%)和双环戊酮X(8%)。V和VII的形成可以通过考虑一种常见的中间体,即发光型酮III来合理化。该结果表明4-羟基-2,5-环己二酮经历与通常的2,5-环己二酮类似的光重排。在甲醇中辐照I,主要得到双环戊酮XI(60%)。但是,I在二甲基甲酰胺中进行光解后,与双环戊酮XI(22%)一起形成了主要产物(49%)的异构体双环戊酮X。2,4,6-三叔丁基-4-乙酰氧基-2,5-环己二酮(II)的光解得到2,4,6-三叔丁基苯酚(3%),荧光酮XV(11%)和光酚XVI(47%)。讨论了这些反应的机理。