反应详情

To suspension of 2-Hydroxy-4-methyl-2-hexadecylmorpholine (5 g, 14.66 mmol) in methanol (150 mL) at 0° C. was added NaBH4 (1.1 g, 29 mmol over a period of 10 min. The reaction mixture was brought to room temperature slowly and stirred at room temperature for 12 hours. Additional NnBH4 (200 mg, 5.2 mmol) was added at room temperature and stirred for 2 hours at room temperature. Methanol was removed by rotavop and the residue was treated with water (100 mL) and extracted with CH2Cl2 (3×50 mL). The combined organic phase was washed with water, brine and dried over Na2SO4. Evaporation of the solvent gave a product which was used without further purification in the next step. Yield 4.92g, 98%. NMR 1H (CDCl3, 200 MHz) 0.88 (3H, t, CH3), 1.26 (28H, s, CH2), 1.40 (2H, m, CH2), 2.32 (3H, s, N--CH3), 2.3-2.7 (4H, m, CH2), 3.66 (3H, m, CH2OH, CHOH). NMR 13C (CDCl3, 50 MHz) 67.6, 64.2, 59.7, 59.3, 42.5, 34.9, 31.9, 29.6, 29.3, 25.6, 22.6, 14.0. IR (KBr) cm-1 3436, 2918, 2850, 1469, 1087, 880, 722.

1. customwas brought to room temperature
2. additionAdditional NnBH4 (200 mg, 5.2 mmol) was added at room temperature
3. stirringstirred for 2 hours at room temperature
4. customMethanol was removed by rotavop
5. additionthe residue was treated with water (100 mL)
6. extractionextracted with CH2Cl2 (3×50 mL)
7. washThe combined organic phase was washed with water, brine
8. dry with materialdried over Na2SO4
9. customEvaporation of the solvent
10. customgave a product which
11. customwas used without further purification in the next step