Methanesulfonyl chloride → HCID 22004847, compound

Participants

Reaction Steps

To a solution of N-[2-[1-formyl-2,3-dihydro-5-hydroxy-4-(2-hydroxyethyl)indol-3-yl]ethyl]propionamide (0.8 g, 2.61 mmol) in pyridine (10 mL) was added methansulfonyl chloride (0.2 mL, 2.61 mmol.) around −10° C. The mixture was stirred for 20 minutes while keeping the temperature −10 to 5° C. To this was added additional methansulfonyl chloride (0.1 mL, 1.3 mmol.) and the mixture was stirred for further 15 minutes at the same temperature. The mixture was diluted with ethyl acetate(10 mL). Saturated aqueous sodium hydrogen carbonate solution (10 mL) was added slowly and the mixture was stirred for 30 minutes at room temperature. The organic layer was separated and the aqueous layer was extracted with ethyl acetate. The combined organic layer was washed with 2N-hydrochloric acid and water, dried over anhydrous magnesium sulfate and evaporated. The residue was purified by silica gel column chromatography (chloroform:methanol=9:1) to afford the title compound (yield 0.25 g, 33%).

Provenance & Evidence