Aryl diazonium salts and benzene derivatives bearing two electron-donor substituents: chemical and mechanistic behaviours

Abstract

The reaction between benzene derivatives 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.