Homolytic aromatic substitution of heterocyclic compounds. Part V. The phenylation of benzo[b]thiophen and benzo[b]furan
作者:P. Spagnolo、M. Tiecco、A. Tundo、G. Martelli
DOI:10.1039/p19720000556
日期:——
The homolytic phenylation of benzo[b]thiophen and benzo[b]furan has been carried out, with the thermal decomposition of N-nitrosoacetanilide as the source of phenyl radicals. The isomer ratios and the relative reactivities have been determined. Homolytic substitution in benzo[b]furan takes place almost exclusively in the heterocyclic ring, in contrast with benzo[b]thiophen, in which all the available
苯并[ b ]噻吩和苯并[ b ]呋喃的均相苯基化反应是通过N-亚硝基乙酰苯胺的热分解作为苯基自由基的来源进行的。已经确定了异构体比例和相对反应性。与苯并[ b ]噻吩相比,苯并[ b ]呋喃中的均质取代几乎完全在杂环中发生,在苯并[ b ]噻吩中,所有可用位置均显示出可替代的对苯基取代的反应性。