反应详情

温度

-10 °C

1-Aza-bicyclo[3.3.1]nonan-4-one (11.92 g, 85.6 mmol) is dissolved in 160 ml MeOH and cooled to −10° C. NaBH4 (1.69 g, 42.9 mmol)) is added portionwise so that the inner temperature does not exceed 0° C. The reaction mixture is stirred at −10° C. for 1 h. Water is added and the solvents are evaporated. The remaining solid is dissolved in MTBE/MeOH, filtered over hyflo and the filtrate is evaporated to give 19.28 g of crude product which is purified by chromatography over aluminum oxide (400 g, eluent: MTBE/MeOH 95:5 to 80:20) to give 10.96 g (91%) (4SR,5RS)-1-aza-bicyclo[3.3.1]nonan-4-ol.

1. customdoes not exceed 0° C
2. customthe solvents are evaporated
3. dissolutionThe remaining solid is dissolved in MTBE/MeOH
4. filtrationfiltered over hyflo
5. customthe filtrate is evaporated
6. customto give 19.28 g of crude product which
7. customis purified by chromatography over aluminum oxide (400 g, eluent: MTBE/MeOH 95:5 to 80:20)