Hydrochloric Acid → HCID 18377387, compound

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Reaction Steps

An ether solution of 48 g. of 1-piperidino-3,4-dihydronaphthalene as prepared above is treated with gaseous HCl to precipitate the salt. Rapid filtering to avoid hydrolysis by moisture followed by drying over potassium hydroxide in a vacuum dessicator provides a white powder salt which is added portionwise to an ether suspension of excess lithium aluminum hydride. After 1 hour of stirring, the excess reagent is decomposed by the cautious dropwise addition of potassium carbonate solution until a granular white precipitate forms. Filtration and concentration leaves an oil which is fractionally distilled to yield 25 g. of 1-(1-tetrahydronaphthyl)piperidine collected at 102°-106° (0.3 mm.).

Provenance & Evidence