反应详情

A stirred solution of 2-(2-amino-ethyl)-4-phenyl-1H-pyrrole-3-carboxylic acid ethyl ester, lithium hydroxide monohydrate (840 mg, 20 mmol) in ethanol (20 ml) was heated to reflux under an argon atmosphere for 3 hours. The mixture was added with cold water (150 ml), stirred for 10 minutes, extracted with dichloromethane:methanol=5:1 (50 ml×7), washed with brine, dried with anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude product was recrystallized from dichloromethane and methanol to give 4-oxo-3-phenyl-4,5,6,7-tetrahydro-1H-pyrrolo[3,2-c]pyridine-2-carbaldehyde (280 mg, 38.9%) as a red solid.

1. temperatureto reflux under an argon atmosphere for 3 hours
2. extractionextracted with dichloromethane
3. washmethanol=5:1 (50 ml×7), washed with brine
4. dry with materialdried with anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe crude product was recrystallized from dichloromethane and methanol