反应详情

A solution of 4-(3-aminopropyl)morpholine (10.0 mL, 68.4 mmol) in MeOH (180 mL) was cooled in an ice bath and treated with ethyl glyoxylate (50% solution in toluene, 20.0 mL, 98.0 mmol) and HOAc (12 mL). After stirring for 15 min, NaBH3CN (4.81 g, 76.5 mmol) was added and the mixture was allowed to stir at 0° C. for 2 h. The mixture was diluted with saturated aqueous NaHCO3 (500 mL) and then extracted with EtOAc (5×300 mL) followed by CH2Cl2 (9×200 mL). The combined CH2Cl2 layers were dried over Na2SO4, filtered and the solvent was removed in vacuo to give the title compound (7.44 g, 47%) as a colorless oil: MS (ESI) m/e 231 (M+H)+.

1. stirringto stir at 0° C. for 2 h
2. extractionextracted with EtOAc (5×300 mL)
3. dry with materialThe combined CH2Cl2 layers were dried over Na2SO4
4. filtrationfiltered
5. customthe solvent was removed in vacuo