Potassium Carbonate → Tert-butyl cyclopropyl(6-ethynyl-3-formylimidazo[1,2-a]pyrazin-8-yl)carbamate

Participants

Reaction Steps

Potassium carbonate (86 mg, 0.63 mmol) was added to tert-butyl cyclopropyl(3-formyl-6-((trimethylsilyl)ethynyl)imidazo[1,2-a]pyrazin-8-yl)carbamate (50 mg, 0.13 mmol) dissolved in methanol (2.5 mL). After 2 h, the volatiles were removed in vacuo. The residue was partitioned between dichloromethane (10 mL) and water (10 mL). The aqueous layer was further extracted with dichloromethane (2×10 mL). The organics were washed with brine (30 mL), dried over MgSO4, filtered and concentrated in vacuo. The residue was purified via flash column chromatography (30% EtOAc/hexanes) to provide tert-butyl cyclopropyl(6-ethynyl-3-formylimidazo[1,2-a]pyrazin-8-yl)carbamate (20 mg, 50%) as a yellow foamy solid. LCMS (ES): >95% pure, m/z 327 [M+1]+.

Provenance & Evidence