Oxindole → HCID 69662062, compound

Participants

Reaction Steps

To a solution of oxindole (205 mg, 1.54 mmol) in dimethoxyethane (4.0 ml) at room temperature was added 1.0M LiHMDS in THF (1.54 ml). After stirring for 10 minutes at room temperature, 3-dimethylaminomethyl-3H-isobenzofuran-1-one (235 mg, 1.23 mmol) in dimethoxyethane (0.5 ml) was added and the mixture was stirred rapidly for 1 hour. Additional 1.0M LiHMDS/THF (1.54 ml) was added. After 2 hours the reaction was quenched into 10% HCl (50 ml) and 25 ml water added. The aqueous layer was washed with EtOAc and then basified with saturated NaHCO3 aqueous solution. The aqueous layer was extracted with EtOAc. The EtOAc layer was washed with brine, dried over anhydrous Na2SO4, and rotary evaporated to provide a yellow solid. The yellow solid was chromatographed silica gel column (CHCl3 to 2.5% MeOH/CHCl3 gradient) and then recrystallized from MeOH to give 3-(3-dimethylaminomethy-3H-isobenzofuran-1-ylidene)-1,3-dihydro-indol-2-one as yellow needles (92 mg, 24%).

Provenance & Evidence