反应详情

温度

150 °C

The mixture of ethyl N-(4-chlorophenyl)glycinate (0.43 g), 5-chloro-2-chloromethylbenzimidazole (0.4 g), and sodium bicarbonate (0.17 g) in N,N-dimethylformamide (2 ml) was stirred at 150° C. for 0.5 h. After cooling to rt the mixture was poured into saturated sodium bicarbonate solution (50 ml) and extracted twice with EtOAc (40 ml). The combined organic layers were washed with 10% sodium carbonate solution (40 ml) and water (40 ml) and dried (sodium sulfate). After concentration the crude (0.66 g) was purified by flash chromatography (dichloromethane/1% methanol) on silica gel to provide an orange solid. The solid was further purified by trituration with diethyl ether to give ethyl N-[(5-chloro-2-benzimidazolyl)methyl]-N-(4-chlorophenyl)glycinate (0.17 g) as a light orange crystals.

1. temperatureAfter cooling to rt the mixture
2. extractionextracted twice with EtOAc (40 ml)
3. washThe combined organic layers were washed with 10% sodium carbonate solution (40 ml) and water (40 ml)
4. dry with materialdried (sodium sulfate)
5. concentrationAfter concentration the crude (0.66 g)
6. customwas purified by flash chromatography (dichloromethane/1% methanol) on silica gel
7. customto provide an orange solid
8. customThe solid was further purified by trituration with diethyl ether