Hydrochloric Acid → HCID 20969407, compound

Participants

Reaction Steps

A suspension of 5-chlorosulfonyl-2-oxindole (1.62 g, 7 mmol), benzylamine (0.918 mL, 8.4 mmol) and pyridine (1 mL) in dichloromethane (20 mL) was stirred at room temperature for 4 hours. The reaction mixture was diluted with ethyl acetate (300 mL) and acidified with 1 N hydrochloric acid (16 mL). The organic layer was then washed with sodium bicarbonate and brine, dried and concentrated. The residue was washed with ethanol (3 mL) and was then purified by chromatography on silica gel eluting with methanol:dichloromethane 1:9 to give 1.4 g (66%) of 2-oxo-2,3-dihydro-1H-indole-5-sulfonic acid benzylamide.

Provenance & Evidence