反应详情

A mixture of methyl 2-chlorobenzoxazole-4-carboxylate (620 mg, 2.96 mmol) and (3S,5S)-3,5-dimethylmorpholine (341 mg, 2.96 mmol) and potassium carbonate (1.0 g, 7.4 mmol), in DMF (15 mL), was stirred in a 35° C. oil bath. After 17 h, the reaction mixture was cooled to ambient temperature, diluted with H2O (50 mL) and extracted with EtOAc (2×30 mL). The combined organic layers were washed with H2O (3×20 mL), brine (20 mL), dried (Na2SO4), and concentrated under reduced pressure. Methyl 2-((3 S,5S)-3,5-dimethylmorpholino)benzoxazole-4-carboxylate (770 mg, 89%) was obtained as an amber oil. 1H NMR consistent.

1. extractionextracted with EtOAc (2×30 mL)
2. washThe combined organic layers were washed with H2O (3×20 mL), brine (20 mL)
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated under reduced pressure