Water → HCID 67509998, compound

Participants

Reaction Steps

N-[3-amino-1-(4-fluorobenzyl)-2,3-dioxopropyl]-2-[3-(2,4-dichlorophenyl)-1H-pyrazol-1-yl]nicotinamide (0.09 g, 0.171 mmol) was dissolved in dimethylformamide (DMF, 1.7 ml) forming a slight yellow solution. Then, 2-bromoethanol (0.059 ml, 0.838 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 0.090 ml, 0.598 mmol) were added with stirring at room temperature. Stirring was continued over night. Water was added to reaction mixture resulting in precipitation of the desired product. The suspension was stirred for 30 min. at 0-5° C. The suspension was filtered under reduced pressure, the precipitate washed three times with ice cold water, and subsequently dried at 40° C. under reduced pressure. The remaining residue (85 mg) was treated with a dichloromethane/methanol mixture (97:3 v/v) and the resulting suspension was stirred at room temperature for 30 min. The precipitate was filtered under reduced pressure. washed with few amounts of dichloromethane and subsequently dried at 40° C. under reduced pressure resulting in 19 mg off-white powder. An additional amount of pure desired product could be obtained by column chromatography of the evaporated filtrate.

Provenance & Evidence