3-Methyl-1H-pyrazole-4-boronic acid pinacol ester → HCID 59022982, compound

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Reaction Steps

In the same way as described for Compound 127, step 4, using 5-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (75 mg, 0.36 mmol), (5-bromoimidazo[1,2-a]pyrazin-8-yl)-(4-(4-methylpiperazin-1-yl)phenyl)amine (70 mg, 0.18 mmol) and Pd(PPh3)4 (52 mg, 0.045 mmol) in dioxane (0.6 mL), DMF (1.33 mL) and 1.5M Na2CO3 (0.97 mL). The residue is chromatographed on silica gel, eluting with DCM followed by 95:5 DCM:NH3 (7M in MeOH), and the fractions containing the desired product are combined and evaporated. The title compound is isolated as a solid. HPLC (254 nm): Rt 1.62 min (98.2%); m/z (APCI) 389 (M+H)+.

Provenance & Evidence