Dimethylformamide → HCID 23079533, Verbindung

To a solution of 3-benzyloxy-1-isopropyl-5-(4-methoxyphenyl)-1H-pyrazole (0.40 g) in N,N-dimethylformamide (1.5 mL) was added phosphorus oxychloride (0.23 g) at 80° C. and the mixture was stirred at 80° C. for 1 hour. After cooling to room temperature, a sodium hydroxide aqueous solution (1 mol/L, 5 mL) was added to the reaction mixture and the mixture was extracted with diethyl ether. The organic layer was dried over anhydrous magnesium sulfate and the solvent was removed under reduced pressure to give the title compound (0.42 g).