Dimethylformamide → HCID 89546935, compound

Participants

Reaction Steps

DIPEA (17 ml) was added to a DMF (30 ml) solution containing tert-butyl ((1R,2S)-1-amino-1-cyclobutylpropan-2-yl)carbamate and 2,6-dichloro-5-fluoronicotinonitrile (16.2 g) obtained in the 5th step at 70° C., followed by stirring for 3 hours. The reaction solution was adjusted to room temperature and water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layers were washed with saturated saline and the organic layers were dried over anhydrous sodium sulfate. The obtained residue was purified by silica gel chromatography (n-hexane:ethyl acetate=10:1 to 1:1). A white solid of tert-butyl ((1R,2S)-1-((6-chloro-5-cyano-3-fluoropyridin-2-yl)amino)-1-cyclobutylpropan-2-yl)carbamate (16.5 g) was thus obtained.

Provenance & Evidence