To methyl 2-(3-acetyl-5-hydroxy-1H-indazol-1-yl)acetate (1.80 g, 7.25 mmol) in CH3CN (75 mL) was added 2-(chloromethyl)pyrimidine hydrochloride (1.32 g, 7.98 mmol) and Cs2CO3 (5.91 g, 18.13 mmol). The reaction mixture was stirred at 70° C. for 2 h. The reaction mixture was filtered and washed with CH3CN. The solvent was removed under reduced pressure and the crude residue was purified by flash column chromatography on silica gel (c-hexane/EtOAc 1:1 to 1:3). TLC, Rf (c-hexane/EtOAc 1:3)=0.35; MS (LC/MS): 340.9 [M+H]+, 363.0 [M+Na]+; tR (HPLC conditions e): 3.64 min.
