反应详情

温度

40 °C

20.4 g (163 mmol) of 3-quinuclidinone and 41.4 g (212 mmol) of (4-toluenesulfonyl)methyl isocyanide are introduced into 435 ml of 1,2-dimethoxyethane and 16 ml of dry ethanol while cooling in ice. 45.7 g (407 mmol) of potassium tert-butoxide are slowly added in such a way that the temperature does not rise above 10° C. The mixture is then heated at 40° C. for 2.5 h. After cooling to RT, the resulting solid is filtered off. The filtrate is concentrated and chromatographed on neutral alumina (mobile phase: dichloromethane→ethyl acetate→ethyl acetate/methanol 50:1). 22.9 g (quant.) of the racemic product are obtained in slightly impure form.

1. temperaturewhile cooling in ice
2. customdoes not rise above 10° C
3. temperatureAfter cooling to RT
4. filtrationthe resulting solid is filtered off
5. concentrationThe filtrate is concentrated
6. customchromatographed on neutral alumina (mobile phase: dichloromethane→ethyl acetate→ethyl acetate/methanol 50:1)
7. custom22.9 g (quant.) of the racemic product are obtained in slightly impure form