Reaction of Singlet Oxygen with 2-Methylnorborn-2-ene, 2-Methylidenenorbornane, and their 7,7-Dimethyl Derivatives. The transition state geometry for hydroperoxidation
作者:Charles W. Jefford、Andr� F. Boschung
DOI:10.1002/hlca.19740570742
日期:1974.11.6
also gave a little norbornanone (presumably from the dioxetane) and 5 gave some endo-3,7,7-trimethylnorbornan-2-one as a secondary photo-product. It was found that the exo/endo attack ratios by singlet oxygen on 3 and 5 are 66 and 0.19. By exploiting the C (3) monodeuteriated derivatives, 4 and 6 showed ratios of 28 and 0.67.
对2-甲基降冰片烯2-(3),2-亚甲基-降冰片烷(4)及其7,7-二甲基衍生物(5和6)进行了染料敏化的光氧化。在所有情况下,都会形成烯丙基重排的氢过氧化物,不同的是4还产生了少量降冰片烷酮(大概是由二氧杂环丁烷)而5产生了一些内生的-3,7,7-三甲基降冰片烷-2-酮作为二次光产物。发现单线态氧在3和5上的外/内攻击率分别为66和0.19。通过利用C(3)一元氘代衍生物4和6 显示比率为28和0.67。