Sodium Sulfite → N-[5-(2-methoxyethoxy)-2-(8-oxido-1,8-dithia-3-azaspiro[4.5]dec-2-en-2-yl)-1H-indol-7-yl]-N-methylpyridine-2-sulfonamide

Participants

Reaction Steps

To a solution of N-[2-(1,8-dithia-3-azaspiro[4.5]dec-2-en-2-yl)-5-(2-methoxyethoxy)-1H-indol-7-yl]-N-methylpyridine-2-sulfonamide (50.7 mg) in methanol (2 mL), water (1 mL) and dichloromethane (1 mL) was added OXONE (registered trade mark, 29 mg) at room temperature, and the mixture was stirred for 18 hr. Aqueous sodium sulfite solution was added to the reaction mixture, and the mixture was stirred for 30 min. The organic solvent was evaporated under reduced pressure. The residue was extracted with ethyl acetate, and the organic layer was washed with water and saturated brine, dried (MgSO4), and concentrated. The residue was subjected to basic silica gel column chromatography, and eluted with ethyl acetate to give two steric isomers (10.3 mg, yield 20% (retention time: shorter), and 1.7 mg, yield 3% (retention time: longer)) of the title compound as a colorless amorphous solid, respectively.

Provenance & Evidence