Methyl chloroformate → Methyl 7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

To 5-amino-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (50 mg, 0.23 mmol) in 1.0 mL tetrahydrofuran was added methyl chloroformate (35 ul, 0.46 mmol) and DIEA (39 ul). The reaction mixture was heated at 60° C. for one hour. The reaction was partitioned between ethyl acetate/water. The organic layer was collected, dried over sodium sulfate, and concentrated under high vacuum to yield methyl 7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylcarbamate. The crude product was taken to next step without further purification. LCMS (M+1=276)

Provenance & Evidence