反应详情

2-(7-Aza-1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate (19.0 g), N-methoxymethanamine (5.0 g), and triethylamine (15.1 g) were added to a solution of 2-cyclopropylacetic acid (5.0 g) in CH2Cl2 (200 mL) at 0° C. The mixture was stirred at room temperature for 3 h. The reaction mixture was then washed with water and the aqueous washing phase was extracted with ethyl acetate (5×50 mL). The combined organic layers were dried (Na2SO4) and concentrated. The residue was purified by chromatography on silica gel (petroleum ether/ethyl acetate 20:1→5:1) to give the title compound. Yield: 4.1 g (58% of theory).

1. washThe reaction mixture was then washed with water
2. extractionthe aqueous washing phase was extracted with ethyl acetate (5×50 mL)
3. dry with materialThe combined organic layers were dried (Na2SO4)
4. concentrationconcentrated
5. customThe residue was purified by chromatography on silica gel (petroleum ether/ethyl acetate 20:1→5:1)