反应详情

To a mixture of 2-(cyclopropanecarbonyl-amino)-4-oxo-4,5-dihydro-imidazole-1-carboxylic acid benzyl ester (109.6 mg, 0.36 mmol), 1,5-naphthyridine-6-carboxaldehyde (47.4 mg, 0.30 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 3.5 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 to give cyclopropanecarboxylic acid (5-[1,5]naphthyridin-2-ylmethylene-4-oxo-4,5-dihydro-1H-imidazol-2-yl)-amide as a light brown solid, 32.6 mg (35.4%). HR-ES (+) m/e calcd. for C16H13N5O2: (M)+ 307.1069. Found: 307.1066.

1. temperaturethe suspension was then heated
2. temperatureunder refluxing for 3.5 hrs
3. customto give a suspension
4. filtrationthe solid was collected by filtration
5. washwashed with MeOH, and ether