Transition-Metal-Free Arylations via Photogenerated Triplet 4-Alkyl- and 4-Trimethylsilylphenyl Cations
作者:Hisham Qrareya、Carlotta Raviola、Stefano Protti、Maurizio Fagnoni、Angelo Albini
DOI:10.1021/jo4007046
日期:2013.6.21
The irradiation in protic solvents of 4-chloroalkylbenzenes and 4-chlorophenyltrimethylsilane caused the heterolytic cleavage of aryl–chlorine bonds to give the corresponding triplet phenyl cations. These were exploited for transition-metal-free arylation reactions under mild conditions to give allylbenzenes, γ-benzyl lactones, 3-arylacetals (ketals), and biaryls in moderate to good yields. The path
在4-氯烷基苯和4-氯苯基三甲基硅烷的质子溶剂中辐照导致芳基-氯键的杂合裂解,得到相应的三重苯基阳离子。将它们用于温和条件下的无过渡金属芳构化反应,以中等至良好的收率得到烯丙基苯,γ-苄基内酯,3-芳基缩醛(缩酮)和联芳基。UB3LYP / 6-311 + G(2d,p)级别的DFT计算支持了所遵循的路径。