Abstract

Heck reactions and Suzuki-Miyaura cross-couplings with relatively poorly reactive 3,5-dichloro-2-pyrazinones were studied at the same temperature under conventional heating, dielectric heating (MW) and simultaneous MW/US irradiation. This comparative study showed a synergic effect of combined MW and US irradiation resulting in a much higher reaction yield, at the same time avoiding side reactions and partial degradation that is otherwise observed under conventional heating.

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