potassium carbonate in acetone 12 h; Inert atmosphereReflux;

1: potassium carbonate / acetone / 12 h / |Inert atmosphere; |Reflux 2: palladium diacetate; copper diacetate / N,N-dimethyl-formamide / 1.17 h / 130 °C / |Inert atmosphere; |Microwave irradiation View Scheme