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A solution of 5.54 g (0.019 mole) of 4-(diphenylmethyl)-1-piperidinecarbothioaldehyde in 20 ml of chloroform was treated with 2.65 g (1.16 ml, 0.019 mole) of methyl iodide and refluxed for one hour. The resulting solution was treated with 3.49 g (0.019 mole) of n-dodecylamine, refluxed one and one half hours, cooled, treated with aqueous sodium hydroxide and the organic layer separated. After drying, evaporation yielded an oil which was converted to the fumarate to yield 4-(diphenylmethyl)-1-N-(n-dodecyliminomethyl)piperidine fumarate; m.p. 143°-145.5° C.

1. temperaturerefluxed for one hour
2. temperaturerefluxed one and one half hours
3. temperaturecooled
4. customthe organic layer separated
5. customAfter drying
6. customevaporation
7. customyielded an oil which