Piperidine → HCID 14390265, compound

Participants

Reaction Steps

A solution of 2-(3-chlorophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (5.0 g, 0.017 mole), 1,1'-carbonyldiimidazole (3.0 g, 0.018 mole), and anhydrous tetrahydrofuran (100 ml) was stirred at room temperature with a stream of nitrogen bubbling through it for 3 hours. The nitrogen flow was stopped and a solution of piperidine (1.6 g, 0.019 mole) in dry tetrahydrofuran (50 ml) was added. The solution was stirred at room temperature under nitrogen for 2 hours. The reaction was concentrated in vacuo and the residue triturated in water (100 ml) and the mix was filtered. The filter cake was recrystallized from isopropyl alcohol-isopropyl ether to give 3.4 g (56%) of off-white flakes, mp 140°-150° C.

Provenance & Evidence