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A solution of 45.2 g. (0.41 mole) of 1-piperidinecarbonitrile and 11 g. (0.05 mole) of a 25% solution of sodium methoxide in methanol in 200 ml. of methanol is stirred at room temperature under a nitrogen atmosphere for 18 hours. The solvent is evaporated and the residue is taken up in ether. The ether solution is filtered through a small pad of Celite and evaporated to constant weight to give 57.8 g. (99%) of a colorless oil.

1. customThe solvent is evaporated
2. filtrationThe ether solution is filtered through a small pad of Celite
3. customevaporated to constant weight
4. customto give 57.8 g