Short-RInChIKey=SA-FUHFF-UHFFFADPSC-KPRSIIAWIW-UHFFFADPSC-NUHFF-NUHFF-NUHFF-ZZZ

(E)-2-(4-(Acetamidomethyl)-3-(3,3-diisopropyltriaz-1-en-1-yl)-1H-pyrazol-1-yl)ethyl acetate (136 mg, 385 μmol, 1.00 equiv) was dissolved in 40 mL of dry methylene chloride under nitrogen atmosphere. 2,2,2-trifluoroacetic acid (132 mg, 88.5 μL, 1.16 mmol, 3.00 equiv) was added and the mixture was stirred at room temperature for 16 hours. The reaction was diluted with 40 mL of saturated K2CO3-solution and the aqueous phase was extracted with 3x 40 mL of methylene chloride. The combined organic layers were washed with 40 mL of brine and dried over Na2SO4. The solvent was removed under reduced pressure to give the crude product.