Triethylamine → N-(5-((2-(2,2-Dimethylpyrrolidin-1-yl)ethyl)carbamoyl)-2-fluorophenyl)-7-(1-methyl-1H-pyrazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide

Participants

Reaction Steps

A solution of 4-fluoro-3-(7-(1-methyl-1H-pyrazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamido)benzoic acid (step 1) (6.31 g, 16.63 mmol), 2-(2,2-dimethylpyrrolidin-1-yl)ethanamine (2.84 g, 19.96 mmol) and triethylamine (6.96 ml, 49.9 mmol) in DMF (36.9 ml) and EtOAc (2 ml) was treated dropwise with ®T3P (propylphosphonic anhydride) (50% w/w in EtOAc) (15.88 g, 24.95 mmol). The resulting mixture was stirred at RT for 16 hrs and diluted with 10% MeOH/EtOAc (62.7 ml). The mixture was washed with 0.5 M LiCl, H2O and sat. NaHCO3. The aqueous layer was back-extracted with 10% MeOH EtOAc (62.7 ml) (3×100 ml). The combined organic extracts was dried MgSO4, filtered and concentrated in vacuo. The resulting solid was triturated with EtOAc and dried at 45° C. to afford the title compound;

Provenance & Evidence