反应详情

To a mixture of 4-oxo-2-(2-trifluoromethyl-benzylamino)-4,5-dihydro-imidazole-1-carboxylic acid benzyl ester (70.4 mg, 0.18 mmol), 1,5-naphthyridine-6-carboxaldehyde (28.7 mg, 0.18 mmol) and iPrOH (5.0 mL) in a 25-mL round bottom flask was added piperidine (0.05 mL) and the suspension was then heated under refluxing for 4 hrs to give a suspension. The reaction mixture was cooled to r.t. and the solid was collected by filtration, washed with MeOH and ether. The solid was then re-crystallized from AcOEt-MeOH to give 5-[1,5]naphthyridin-2-ylmethylene-2-(2-trifluoromethybenzylamino)-1,5-dihydro-imidazol-4-one as a light yellow crystalline material (11.6 mg, 16.2%). HR-ES (+) m/e calcd. for C20H14F3N5O: (M+H)+ 398.1223. Found: 398.1222.

1. temperaturethe suspension was then heated
2. temperatureunder refluxing for 4 hrs
3. customto give a suspension
4. filtrationthe solid was collected by filtration
5. washwashed with MeOH and ether
6. customThe solid was then re-crystallized from AcOEt-MeOH