Benzyl chloroformate → [4-(4-Acryloylamino-piperidine-1-sulfonyl)-phenyl]carbamic acid benzyl ester

Participants

Reaction Steps

N-[1-(4-Amino-benzenesulfonyl)-piperidin-4-yl]-acrylamide (0.09 g, 0.3 mmol) was dissolved in THF (5 ml). To this was added diisopropylethylamine (0.1 ml, 0.6 mmol) in one portion followed by the drop wise addition of benzyl chloroformate (0.05 ml, 0.33 mmol) and the mixture was stirred at room temperature under a nitrogen atmosphere for 3 hours. After this time the mixture was diluted with DCM (100 ml) and washed sequentially with HCl (1M solution, 50 ml), NaOH (1M solution, 50 ml) and brine (50 ml). The organic layer was separated, dried (MgSO4), filtered and concentrated. The resulting residue was purified by flash column chromatography (elution: 100% EtOAc) to give the title compound (0.04 g, 34% yield) as a white powder.

Provenance & Evidence