liquid-liquid- and liquid-solid two-phase systems. The tetrakis[3,5-bis(trifluoromethyl)phenyl]borate ion was effective as an anionic catalyst to accelerate the reactions. Comparisons of the reaction rates in the two-phase system with those in solution systems indicated that the acceleration was due to the increased activity of the cationic reagent, partly by solubilization and partly by the dehydration
Meyer,K. H.; Lenhardt, Justus Liebigs Annalen der Chemie, 1913, vol. 398, p. 69
作者:Meyer,K. H.、Lenhardt
DOI:——
日期:——
Aryl diazonium salts and benzene derivatives bearing two electron-donor substituents: chemical and mechanistic behaviours
作者:Gabriele Micheletti、Carla Boga
DOI:10.1039/d4ra00652f
日期:——
The reaction between benzenederivatives 1–4 and p-substituted benzenediazonium tetrafluoroborates 5a–c provided novel azo-coupling products in high yields under mild conditions. The monitoring of the reaction progress using 1H-NMR provided mechanistic information on both the relative reactivity of the reagents and the possibility to detect novel reaction intermediates.