2-Chlorobenzenesulfonyl chloride → HCID 86584800, compound

Participants

Reaction Steps

2-Chlorobenzenesulfonyl chloride (0.225 g; 1.06 mmol) was added to a cold solution (ice:water temperature) of 3-[2-(4-cyanophenyl)ethoxy]-5-methyl-phenylaminoacetic acid, ethyl ester (0.30 g; 0.88 mmol; from step (i) above) in pyridine (10 mL). After 2 hours stirring the temperature was allowed to rise to ambient. After 4 hours at this temperature more 2-chloro-benzenesulfonyl chloride (0.056 g; 0.26 mmol) was added and the mixture was left overnight. The mixture was then poured into aqueous saturated NaHCO3 and extracted twice with Et2O. The combined ether phases where washed with HCl/aq (2M), H2O and brine, dried (MgSO4) and the solvent removed in vacuo. The residue was purified by flash chromatography (SiO2; EtOAc:heptane (1:3)) to give 0.28 g (62%) of the sub-title compound.

Provenance & Evidence