2-Dimethylaminopyridine → methyl 3,5-dichloro-4-{[4-(propanoylamino)-1H-pyrrolo[3,2-c]pyridin-1-yl]carbonyl}benzoate

Participants

Reaction Steps

A stirred solution of 2,6-dichloro-4-(methoxycarbonyl)benzoic acid (600 mg, 2.3 mmol), in dimethylacetamide (10 mL) was treated with 2-(1H-7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyl uronium hexafluorophosphate methanaminium (1300 mg, 3.45 mmol), 1-hydroxy-7-azabenzotriazole (469 mg, 3.45 mmol), N,N-diisopropylethylamine (1.05 mL, 5.75 mmol) and dimethylaminopyridine (140 mg, 1.15 mmol) were added and the mixture was stirred at room temperature for about 1 hour. This was followed by addition of N-(1H-pyrrolo[3,2-c]pyridin-4-yl)propanamide (450 mg, 2.3 mmol) and stirring at room temperature for about 16 hours. The reaction mixture was poured into water (150 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layer was washed with brine (100 mL) and organic layer was separated and dried over anhydrous sodium sulphate to give crude product which was purified by silica gel (100-200 mesh size) column chromatography using ethyl-acetate and hexane as eluting system to give pure methyl 3,5-dichloro-4-{[4-(propanoylamino)-1H-pyrrolo[3,2-c]pyridin-1-yl]carbonyl}benzoate. (250 mg, 25%)

Provenance & Evidence