Ethyl chloroformate → HCID 44518473, compound

Participants

Reaction Steps

To a solution of N-[5-(3,5-difluoro-benzenesulfonyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl]-4-(4-methyl-piperazin-1-yl)-2-(tetrahydro-pyran-4-ylamino)-benzamide (1.38 g, 2.24 mmol) in anhydrous THF (150 mL), cooled to −40° C., under argon, was added lithium bis(trimethylsilyl)amide 1.0 M in THF (2.35 mL, 2.35 mmol). The mixture was stirred for 5 min. then ethyl chloroformate (0.225 mL, 2.35 mmol) was added. The reaction was stirred at −40° C. for 1 h, then was poured in water and extracted with ethyl acetate. The organic phase was washed with water, brine and dried with sodium sulfate. After filtration and evaporation the crude was triturated with ether to give the title compound as white solid (1.32 g, 86%).

Provenance & Evidence