N-Methyl-3-chloromethyl-piperidine

To this newly formed 9-thioxanthyl sodium add dropwise, with stirring and cooling, 13.1 g of N-methyl-3-chloromethyl-piperidine in 30 to 40 ml of absolute benzene, then continue stirring at about 25°C for VA hours, and heat subsequently to 40°C for 1 hour. Decompose the resulting mixture by adding carefully a small amount of water, and then extract the newly formed base from the benzene solution by means of dilute hydrochloric acid. 

It may be prepared by the alkylation of the sodium salt of thioxanthene with N-methyl-3-chloromethyl piperidine. 

---