Photodecaging from 9-substituted 2,7-dihydroxy and dimethoxyfluorenes: competition between heterolytic and homolytic pathways
作者:Aron Roxin、Alex Chase、Elizabeth Jeffers、Matthew Lukeman
DOI:10.1039/c0pp00351d
日期:2011.6
prepared and their photochemistry was studied in methanol and aqueous methanol solution in the hopes of observing efficient expulsion of the substituents positioned at the 9-position. For all three compounds, the primary photoproducts were 2,7-disubstituted-9-fluorenes and 2,7-disubstituted-9-methoxyfluorenes. A mechanism of reaction is proposed for production of these products, and involves competing
2,7-二羟基-9-芴醇(9),2,7-二甲氧基-9-芴醇(10),以及2,7-二甲氧基-9-乙酰氧基芴(11)的制备及其光化学研究。甲醇 和水性 甲醇解决方案是希望观察到位于9位的取代基的有效排出。对于所有三种化合物,主要的光产物是2,7-二取代的9-芴和2,7-二取代的9-甲氧基芴。对于这些产物的生产,提出了一种反应机理,涉及产生自由基和碳正离子中间体的竞争性均质和异质途径。反应量子产率(对于底物消失)在0.21至0.31之间。