Pentafluorophenyl 4-bromo-5-methyl-1H-pyrrole-2-carboxylate → Methyl 2-(4-{[(4-bromo-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidin-1-yl)-6-chloroisonicotinate

Participants

Reaction Steps

Pentafluorophenyl 4-bromo-5-methyl-1H-pyrrole-2-carboxylate (intermediate 17, 1.81 g, 4.90 mmol) and TEA (682 μl, 4.9 mmol) were added to methyl 2-(4-aminopiperidin-1-yl)-6-chloroisonicotinate hydrochloride salt (Intermediate 93; 1.5 g, 4.90 mmol) in anhydrous DMA (10 ml). The mixture was stirred at room temperature 18 h then partitioned between EtOAc and water. The organic layer was washed with water, dried over Na2SO4 and concentrated under vacuum. The solid material was purified by flash chromatography eluting with EtOAc/n-hexanes mixture (7:3) to give the title compound as a brown solid (1.7 g).

Provenance & Evidence