potassium carbonate in N,N-dimethyl acetamide T=20°C; Inert atmosphere;

1: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dichloromethane / 3 h / 20 °C 2: cyclohexa-1,4-diene / palladium on activated charcoal / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere 3: potassium carbonate / N,N-dimethyl acetamide / 20 °C / Inert atmosphere View Scheme

1: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dichloromethane / 3 h / 20 °C 2: cyclohexa-1,4-diene / palladium on activated charcoal / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere 3: potassium carbonate / N,N-dimethyl acetamide / 20 °C / Inert atmosphere View Scheme