in toluene; butan-1-ol 3 h; RefluxInert atmosphere;

1: potassium carbonate / N,N-dimethyl-formamide / 4 h / |Reflux; |Inert atmosphere 2: triethylamine / dichloromethane / 20 °C / |Inert atmosphere View Scheme

potassium carbonate in N,N-dimethyl-formamide 4 h; RefluxInert atmosphere;