1-Bromopropane → 2-[N-(2-cyanoethyl)anilino]ethyl N-propylcarbamate

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To a mixture of 4 g. (.05 mole) of potassium cyanate and 25 ml. of sulfolane at 90° C. are added dropwise 9 ml. (12.3 g, 0.1 mole) of 1-bromopropane over a one-hour period. After 10 minutes of stirring at the same temperature, a solution of 6 g. (0.027 mole) of N-(2-cyanoethyl)-N-(2-hydroxyethyl)aniline in 5 ml. sulfolane is added. The resulting mixture is stirred at 90°-100° C. for three hours and then allowed to cool to 50° C. The mixture is poured into 1 liter of water under agitation, and the resulting layers separated. TLC of the organic layer in 4:1 benzene: acetone shows the absence of starting alcohol with the product of the above formula.

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