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0 °C

In a 20 mL flask, 5-(1-((2-(trimethylsilyl)-ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carbohydrazide (45.1 mg, 0.121 mmol) was dissolved in DCM (604 μL, 0.121 mmol). After cooling to 0° C., triethylamine (20.2 μL, 0.145 mmol) and acetyl chloride (9.45 μL, 0.133 mmol) were added. The reaction mixture was allowed to warm to ambient temperature for 15 hours. This was then diluted in EtOAc and washed with water and brine. The organic layer was then dried with MgSO4, filtered and concentrated down to afford N′-acetyl-5-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carbohydrazide (40.9 mg, 81.5% yield) as a light yellow solid. MS (apci) m/z=416.2 (M+H).

1. temperatureto warm to ambient temperature for 15 hours
2. washwashed with water and brine
3. dry with materialThe organic layer was then dried with MgSO4
4. filtrationfiltered
5. concentrationconcentrated down