[2+2] Photocycloadditions and Photorearrangements of 2-Alkenylcarboxamido-2-cycloalken-1-ones
作者:Catherine Meyer、Olivier Piva、Jean-Pierre Pete
DOI:10.1016/s0040-4020(00)00366-5
日期:2000.6
photolysis of 2-alkenylcarboxamido-2-cycloalken-1-ones led regio- and stereospecifically to a faster [2+2] intramolecular reaction and therefore to the corresponding cyclobutanes. However, photorearrangements involving three different intramolecular H-abstraction processes, compete with the observed cycloaddition. To explain the results, we propose that different deactivation pathways are available
虽然烯烃与2-羧酰胺基环-2-戊-1-烯的分子间光环加成反应不是一个有效的过程,但是2-烯基羧酰胺基-2-环烯-1-酮的光解作用会导致区域和立体特异性产生更快的[2 + 2]分子内反应并因此生成相应的环丁烷。然而,涉及三个不同的分子内H吸收过程的光重排与观察到的环加成竞争。为了解释结果,我们提出了不同的失活途径可用于激发态,具体取决于起始材料中存在的构象异构体。