Triethylamine → HCID 14390263, compound

Participants

Reaction Steps

A solution of 2-(3-chlorophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (8.0 g, 0.028 mole), 1,1'-carbonyldiimidazole (4.5 g, 0.028 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 triethylamine (6.3 g, 0.062 mole) and ethyl 4-aminobutyrate hydrochloride (5.2 g, 0.031 mole) was added all at once. The reaction mixture was stirred under nitrogen over the weekend. The tetrahydrofuran was evaporated and the solid residue triturated in water (100 ml) and filtered off to give 4.7 g (42%) of cake. A 2.3-g portion of the filter cake was recrystallized from isopropyl ether-ethanol to give 1.9 g of white solid, mp 127°-129° C.

Provenance & Evidence