反应详情

A suspension of 2-amino-4-oxo-4,5-dihydro-imidazole-1-carboxylic acid benzyl ester (93.2 mg, 0.40 mmol), 2,4-dimethylbenzylbromide (79.64 mg, 0.40 mmol) and K2CO3 (83.01 mg, 0.60 mmol) in acetonitrile (8 mL) was heated to reflux under argon for 45 min. Partition between EtOAc and water to give a suspension. Filter off the solid to give 2-(2,4-dimethyl-benzylamino)-4-oxo-4,5-dihydro-imidazole-1-carboxylic acid benzyl ester (35.0 mg). The filtrate was separated, dried to give an oil which was purified by preparative TLC, eluted with 50% nHex/EtOAc to give 60.0 mg of 2-(2, 4-dimethyl-benzylamino)-4-oxo-4,5-dihydro-imidazole-1-carboxylic acid benzyl ester as a white solid (total yield: 95.0 mg, 67.7%).

1. temperaturewas heated
2. temperatureto reflux under argon for 45 min
3. customPartition between EtOAc and water
4. customto give a suspension
5. filtrationFilter off the solid