spectra have been recorded for all the synthesized salts; the data are in good agreement with the rather limited published data and constitute a first extensive report of 13C-NMR chemical shifts in diazoniumsalts. An excellent linear relationship emerged between Brown's substituent constants s+p and the 13Cipso chemical shifts. The diazoniumsalts obtained proved to be much more soluble in organic
σ-Bond initiated generation of aryl radicals from aryl diazonium salts
作者:Elene Tatunashvili、Bun Chan、Philippe E. Nashar、Christopher S. P. McErlean
DOI:10.1039/d0ob00205d
日期:——
transform aryl diazoniumsalts into aryl radicals. Experimental and computational studies show that Hantzsch esters transfer hydride to aryl diazonium species, and that oxygen initiates radical fragmentation of the diazene intermediate to produce aryl radicals. The operational simplicity of this addition-fragmentation process for the generation of aryl radicals, by a polar-radical crossover mechanism, has been