反应详情

Under nitrogen bubbling, a mixture of 2-(4-chlorophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (4.0 g, 0.014 mole) and 1,1'-carbonyldiimidazole (2.27 g, 0.014 mole) in 130 ml tetrahydrofuran was stirred at room temperature for 3 hours. Under a nitrogen atmosphere, N-allylamine (1.60 g, 0.028 mole) was added and the reaction mixture was allowed to stir at room temperature overnight. The tetrahydrofuran was evaporated to a solid, which was placed under high vacuum over the weekend. The solid residue was dissolved in isopropyl alcohol, filtered, and diluted with water to initiate crystallization, then refrigerated overnight. The solid was collected by filtration, washed with water, and dried under high vacuum at 50° C. overnight to give 3.0 g (66%) of title compound, mp 208°-9° C.

1. stirringto stir at room temperature overnight
2. customThe tetrahydrofuran was evaporated to a solid, which
3. dissolutionThe solid residue was dissolved in isopropyl alcohol
4. filtrationfiltered
5. additiondiluted with water
6. customcrystallization
7. customrefrigerated overnight
8. filtrationThe solid was collected by filtration
9. washwashed with water
10. customdried under high vacuum at 50° C. overnight