N,N-Dimethyl-1,3-propanediamine → HCID 13534236, compound

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Reaction Steps

A solution, 13 g (0.05 mole) of 3-(3-chlorophenoxy)-1-pyrrolidinecarbonyl chloride in 100 ml of chloroform was stirred at 0° C. for 5 min. Then, the following were added in order: 25 g of ice, 12.8 g of sodium carbonate; and 5.62 g (0.055 mole) of N,N-dimethyl-1,3-propanediamine. The resulting mixture was allowed to come to room temperature and stirred for 72 hours. At this time the reaction mixture was diluted with excess water and the organic phase separated. The chloroform solution was washed with water and extracted with 50 ml of 3N hydrochloric acid. The chloroform portion was washed with 2×25 ml of water. The hydrochloric acid portion was combined with the last 2 washes and the pH adjusted to neutral with 3N sodium hydroxide. The resulting solution was extracted with 3×30 ml of chloroform and the chloroform extracts were combined, dried over magnesium sulfate and concentrated to a dark oil, 13.2 g. All of the samples were converted to the free base, charcoaled, and chromatographed on 25 g of silica gel. Elution with chloroform gave after concentrating a dark orange oil. Trituration of this oil with ethyl ether and concentration of the triturates gave 7 g of a pale yellow viscous oil. This oil was pumped under high vacuum for 24 hours. The oil upon standing crystallized and was recrystallized from ethyl ether/30-60 petroleum ether to give 3.2 g of fine white crystals; m.p. 60°-61° C.

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