Triethylamine → HCID 67811148, compound

Participants

Reaction Steps

3-[3-[4-(1-Methylindol-3-yl)-1H-pyrrole-2,5-dion-3-yl]-indol-1-yl)-propionic acid 272 mg (0.65 mmol) are dissolved in 3 mL anhydrous tetrahydrofuran and mixed with 145 mg (0.70 mmol) dicyclohexylcarbodiimide and a mixture of 90 mg (0.8 mmol) alanine ethyl ester hydrochloride and 85 mg triethylamine dissolved in 5 mL anhydrous tetrahydrofuran. The reaction mixture is stirred for 24 hours at ambient temperature, the solvent is then distilled off in a vacuum, the residue is taken up in 100 mL ethyl acetate, and the organic phase is washed with water. After drying over anhydrous sodium sulphate and distilling off the solvent in a vacuum, the crude product obtained is separated by thick layer chromatography (silica gel, dichloromethane/methanol=90:10%). The fraction with the RF of 0.31 is separated, the product is extracted and, after removal of the solvent in a vacuum, there are isolated 130 mg (40% of theory) of the desired product;

Provenance & Evidence