Dimethylamine → HCID 14390222, compound

Participants

Reaction Steps

A suspension of 2-(4-trifluoromethylphenyl)-3H-imidazo [4,5-b]pyridine-3-acetic acid (10.0 g, 0.031 mole), 1,1'-carbonyldiimidazole (6.0 g, 0.037 mole), and dry tetrahydrofuran (200 ml) was stirred at room temperature for 2 hr. with a stream of nitrogen bubbling through it. The suspension was heated at 50° C. under nitrogen for 2 hr, cooled in ice and treated with a solution of dimethylamine in tetrahydrofuran (4.22 g of dimethylamine in 40 ml of tetrahydrofuran.) The solution was stirred at room temperature overnight, more dimethylamine (0.071 mole in 30 ml of tetrahydrofuran) was added, and the reaction mixture was heated at 45° C. for 3 hr. The reaction mixture was concentrated under reduced pressure; the resulting solid was triturated in water, filtered, rinsed twice with water, twice with 5% potassium hydroxide solution and then twice again with water. The solid was dissolved in hot isopropyl alcohol, filtered hot, and cooled. Water was added and the solid filtered and dried at 80° C. under vacuum to yield 3.55 g (33%) of white solid, mp. 181°-183° C.

Provenance & Evidence