potassium hydroxide; potassium iodide in ethanol T=155°C; 8 h; microwave;

1: 4-bromo(1H)-pyrazole With sodium hydride in N,N-dimethyl-formamide T=20°C; 0.5 h; 2: 2-oxo-1,3-dioxolane in N,N-dimethyl-formamide T=20°C;

1: With potassium acetate in N,N-dimethyl-formamide 0.166667 h; 2: With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in N,N-dimethyl-formamide T=80°C;