Triethylamine → 2-(2-cyclopentyl-5,6,7,8-tetrahydro-indolizin-3-yl)-N-{4-[4-(4,6-dimethyl-pyridin-2-yl)-piperazin-1-yl]-phenyl}-2-oxo-acetamide

Participants

Reaction Conditions

Reaction Steps

A solution of 4-[4-(4,6-dimethyl-pyridin-2-yl)-piperazin-1-yl]-phenylamine (prepared as described in Reference Example 94; 0.20 g, 0.71 mmol) and triethylamine (0.3 mL, 2.1 mmol) in THF (5 mL) was cooled to 0° C. A solution of (2-cyclopentyl-5,6,7,8-tetrahydro-indolizin-3-yl)-oxo-acetyl chloride (prepared as described in Reference Example 22, 0.24 g, 0.85 mmol) in THF (2 mL) was added and the mixture stirred under N2 atmosphere at 0° C. for 1 h and then at room temperature for 1 h. The mixture was quenched with sodium bicarbonate solution and extracted twice with ethyl acetate. The combined organic phases were washed with water and brine, dried over sodium sulfate and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (60-120 mesh) eluting with 12% ethyl acetate/chloroform to afford 2-(2-cyclopentyl-5,6,7,8-tetrahydro-indolizin-3-yl)-N-{4-[4-(4,6-dimethyl-pyridin-2-yl)-piperazin-1-yl]-phenyl}-2-oxo-acetamide (0.17 g, 46%) as a solid.

Provenance & Evidence