Bromine → 5'-Bromo-7'-fluorospiro[cyclopropane-1,3'-indolin]-2'-one

Participants

Reaction Conditions

Reaction Steps

7′-Fluorospiro[cyclopropane-1,3′-indol]-2′(1′H)-one (0.54 g, 3.05 mmol) was dissolved in 20 mL of CH2Cl2 and sodium acetate (0.28 g, 3.36 mmol) was added followed by bromine (0.173 mL, 3.36 mmol). The mixture was stirred at 25° C. for 16 h then diluted with ether and washed with Na2S3O3, sodium bicarbonate, water, brine, dried over MgSO4, and concentrated. Purification by flash chromatography (15% acetone/hexane) afforded 5′-Bromo-7′-fluorospiro[cyclopropane-1,3′-indol]-2′(1′H)-one (0.64 g, 82%) as a white solid:

Provenance & Evidence