Aerobic Oxidation of Olefins and Lignin Model Compounds Using Photogenerated Phthalimide-<i>N</i>-oxyl Radical
作者:Jian Luo、Jian Zhang
DOI:10.1021/acs.joc.6b01704
日期:2016.10.7
A metal-free protocol to generate phthalimide-N-oxyl (PINO) radicals from N-hydroxyphthalimide (NHPI) via a photoinduced proton-coupled electron transfer process is reported. Using donor-substituted aromatic ketones, such as 4,4′-bis(diphenylamino)benzophenone (DPA-BP), PINO radicals are efficiently produced and subsequently utilized to functionalize olefins to afford a new class of alkyl hydroperoxides
报道了通过光诱导质子偶联电子转移过程从N-羟基邻苯二甲酰亚胺(NHPI)生成邻苯二甲酰亚胺-N-氧基(PINO)自由基的无金属方案。使用供体取代的芳族酮,例如4,4'-双(二苯基氨基)二苯甲酮(DPA-BP),可有效产生PINO自由基,随后将其用于官能化烯烃,以提供一类新的烷基氢过氧化物。DPA-BP / NHPI / O 2光催化系统对有氧氧化β-O-4木质素模型表现出很高的效率。