1,2-Dimethoxyethane → 1-Azabicyclo(2.2.2)octane-3-carbonitrile

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20.4 g (163 mmol) of quinuclidin-3-one and 41.37 g (211.87 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. 45.72 g (407.45 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. The solid resulting at RT is filtered off. The filtrate is concentrated and chromatographed on neutral alumina (mobile phase: initially dichloromethane, then ethyl acetate→ethyl acetate/methanol 50:1). 22.9 g (103% of theory) of the product are obtained in slightly impure form.

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