Diethyl Ether → N-[3-(3-piperidinomethylphenoxy)propyl]phthalimide

Beteiligte Stoffe

Reaktionsschritte

In an argon stream, 2.2 g of 60% sodium hydride was suspended in 20 ml of N,N-dimethylformamide. The suspension was added dropwise to a solution of 9.6 g of the 3-(1-piperidinomethyl)phenol obtained in Reference Example 1 in 30 ml of N,N-dimethylformamide, followed by stirring at room temperature for 30 minutes. Next, a solution of 14.7 g of N-(3-bromopropyl)phthalimide in 50 ml of N,N-dimethylformamide was added dropwise to the mixture, and the resulting mixture was stirred at 65° C. for 8 hours. After cooling the mixture, a mixture of diethyl ether and water (1:1) was added thereto for extraction, and the organic layer was concentrated under reduced pressure. To the concentrate was added 6N hydrochloric acid for extraction into the aqueous layer, which was then made alkaline with potassium hydroxide, followed by extraction with diethyl ether. The organic layer was dried over magnesium sulfate and distilled under reduced pressure to remove the solvent, giving 16.3 g of transparent oily N-[3-[3-(piperidinomethyl)-phenoxy]propyl]phthalimide (yield 86% ).

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