Photochemical Co-Oxidation of Sulfides and Phosphines with Tris(<i>p</i>-bromophenyl)amine. A Mechanistic Study
作者:Sergio M. Bonesi、Stefano Protti、Angelo Albini
DOI:10.1021/acs.joc.8b00913
日期:2018.8.3
corresponding amine radical cation (“Magic Blue”) and the N-phenyl-4a,4b-dihydrocarbazole radical cation that, under an oxygen atmosphere, is converted to the corresponding hydroperoxyl radical. The role of the last species was supported by the smooth co-oxidation of sulfides to sulfoxides. On the other hand, co-oxidation of nucleophilic triarylphosphines to triarylphosphine oxides arose from an electron
在激光闪光光解条件下,在吹氮和吹氧的溶液中研究了三(对溴苯基)胺的光化学。所检测的中间体是相应的胺自由基阳离子(“魔幻蓝”)和N-苯基-4a,4b-二氢咔唑自由基阳离子,它们在氧气气氛下转化为相应的氢过氧自由基。硫化物向亚砜的平稳共氧化支持了最后一种物质的作用。另一方面,亲核三芳基膦共氧化为三芳基膦氧化物是由于光生“魔蓝”和膦之间的电子转移而引起的,该电子转移阻止了胺的环化。在这种情况下,中间Ar 3 POO •+ 被发现在氧化膦的形成中起关键作用。