反应详情

Under nitrogen atmosphere, trimethylaluminium (1.03 M n-hexane solution, 1.80 ml, 1.85 mmol) was dropwise added at room temperature to a dichloromethane (3 ml) solution of N-methylphenethylamine (269 μl, 1.85 mmol), and stirred for 25 minutes. Subsequently, a dichloromethane (3 ml) solution of ethyl 4-cyano-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-2-carboxylate (I-111) (300 mg, 925 μl) was dropwise added and stirred for 14.5 hours. After the reaction, aqueous 1 N hydrochloric acid solution was added to the reaction liquid with cooling with ice, followed by stirring at room temperature, and the reaction liquid was extracted with chloroform.

1. stirringstirred for 14.5 hours
2. additionwas added to the reaction liquid
3. temperaturewith cooling with ice
4. stirringby stirring at room temperature
5. customthe reaction liquid
6. extractionwas extracted with chloroform