HCID 21834439, compound → HCID 21834442, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 250 mg (0.906 mmol) of 6-(2-methanesulfonyloxyethyl)-4-methyl-2-(2,5-dimethylpyrrol-1-yl)pyridine (from Example 59, Step A) in 0.70 mL of dry N,N-dimethylformide was added 336 mg (1.81 mmol) of potassium phthalimide and 67 mg (0.18 mmol) of tetrabutylammonium iodide. The mixture was stirred at room temperature for 2 h and at 40° C. for 20 h. The reaction was diluted with 50 mL of dichloromethane, washed with 30 mL of saturated aqueous sodium bicarbonate and 30 mL of saturated aqueous sodium chloride, dried (sodium sulfate), decanted, and evaporated. To remove the contaminating phthalimide, the residue was dissolved in 40 mL of diethyl ether and washed 2×20 mL of 2.5 N aqueous sodium hydroxide, followed by saturated aqueous sodium chloride. The organic phase was dried (sodium sulfate), decanted, and concentrated. Flash column chromatography on 26 g of silica gel, eluting with 200 mL of 7% of ethyl acetate/hexane and 500 mL of 30% of ethyl acetate/hexane furnished 206 mg (63% yield) of 4-methyl-2-(2,5-dimethylpyrrol-1-yl)-6-(2-phthalimidoethyl)pyridine as an amber syrup.

Provenance & Evidence