1: potassium carbonate / N,N-dimethyl-formamide / 32 h / 20 °C / Inert atmosphere 2: sodium methylate / methanol / 9.5 h / 20 °C / Inert atmosphere 3: palladium 10 on activated carbon; hydrogen / ethanol; ethyl acetate / 20 °C / Inert atmosphere View Scheme

1.1: Ag2O; CaSO4; pyridine / AcOH 1.2: cyclohexene / Pd(OH)2/C / ethanol / 0.5 h / Heating 2.1: 89 mg / Na2CO3 / aq. methanol / 2.5 h / 20 °C View Scheme