Dipropylamine → HCID 14390373, compound

Participants

Reaction Steps

Under nitrogen bubbling, a mixture of 2-(4-bromophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (13.28 g, 0.04 mole) and 1,1'-carbonyldiimidazole (7.14 g, 0.044 mole) in 300 ml of tetrahydrofuran was stirred at room temperature for 6 hrs. Then, under nitrogen atmosphere, dipropylamine (12.12 g, 0.12 mole) was added and the reaction mixture was heated at reflux for 3 hrs. The reaction mixture was filtered and the filtrate was evaporated to dryness. The solid was dried under high vacuum overnight and was recrystallized from isopropyl alcohol-water. The crystalline solid was collected by filtration, washed with water, and dried under high vacuum over the weekend to give 9.0 g (54%), mp 153°-55° C.

Provenance & Evidence