反应详情

温度

25 °C

A 14.22 g (0.050 mol) portion of N-dodecanoyl-N′,N′-dimethyl-1,3-diaminopropane and 120 ml of diethyl ether were put into a flask, and 9.93 g (0.050 mol) of 2-phenylethyl chloroacetate was added thereto at 0 to 5° C. spending 5 minutes. The reaction mixture was further stirred at 25° C. for 24 hours, and disappearance of the most part of chloroacetate was confirmed by 1H-NMR. Next, the reaction mixture was slowly added dropwise to 600 ml of hexane which was ice-cooled and vigorously stirred, spending 10 minutes, to effect precipitation of the product as a white solid. Thereafter, in the same manner as described in Inventive Example 1, the title compound (to be referred to as betaine ester (11) hereinafter) was obtained as a white powder. Yield 20.10 g (0.0416 mol; yield 83.2%).

1. temperaturecooled
2. stirringvigorously stirred
3. waitspending 10 minutes
4. customprecipitation of the product as a white solid